Resumo O objetivo foi avaliar a influência da multimorbidade e seus padrões nas atividades básicas de vida diária da pessoa idosa residente na comunidade. Trata-se de estudo de coorte com dados provenientes do Estudo FIBRA, linha de base (2008-2009) e seguimento (2016-2017). As atividades básicas de vida diária (ABVD) foram avaliadas pelo questionário de Katz e as doenças crônicas foram classificadas como (1) multimorbidade e padrões de multimorbidade: (2) cardiopulmonar; (3) vascular-metabólico; e (4) mental-musculoesquelético. Para a análise de dados, utilizou-se o teste qui-quadrado e a regressão de Poisson. Foram analisados 861 indivíduos sem limitação para ABVD na linha de base. As pessoas idosas com multimorbidade (RR = 1,58; IC95%: 1,19-2,10) e classificados nos padrões cardiopulmonar (RR = 2,43; IC95%: 1,77-3,33), vascular-metabólico (RR = 1,50; IC95%: 1,19-1,89) e mental-musculoesquelético (RR = 1,30; IC95%: 1,03-1,65) tiveram maior risco de apresentar declínio funcional nas ABVD no seguimento em comparação aos que não tinham os mesmos padrões de doenças. A multimorbidade e seus padrões aumentaram o risco de incapacidade na pessoa idosa ao longo de nove anos.

Abstract The scope of this article was to evaluate the influence of multimorbidity and associated effects on the activities in the day-to-day lives of community-dwelling elderly individuals. It involved a cohort study with data from the FIBRA Study, the baseline (2008-2009) and follow-up (2016-2017). The basic activities in daily living (ADL) were evaluated using Katz’s index, and the chronic diseases were classified as: (1) multimorbidity and multimorbidity patterns; (2) cardiopulmonary; (3) vascular-metabolic; and (4) mental-musculoskeletal. The chi-square test and Poisson regression data were used for analysis. A total of 861 older adults with no functional dependency at baseline were analyzed. Elderly individuals with multimorbidity (RR = 1.58; 95%CI: 1.19-2.10) and classified according to cardiopulmonary (RR = 2.43; 95%CI: 1.77-3.33), vascular-metabolic (RR = 1.50; 95%CI: 1.19-1.89) and mental-musculoskeletal (RR = 1.30; 95%CI: 1.03-1.65) had a higher risk of presenting functional decline in ADL in the follow-up compared to those who didn’t have the same disease patterns. Multimorbidity and its patterns increased the risk of functional disability in older adults over the nine-year period.

Abstract The scope of this article was to evaluate the influence of multimorbidity and associated effects on the activities in the day-to-day lives of community-dwelling elderly individuals. It involved a cohort study with data from the FIBRA Study, the baseline (2008-2009) and follow-up (2016-2017). The basic activities in daily living (ADL) were evaluated using Katz’s index, and the chronic diseases were classified as: (1) multimorbidity and multimorbidity patterns; (2) cardiopulmonary; (3) vascular-metabolic; and (4) mental-musculoskeletal. The chi-square test and Poisson regression data were used for analysis. A total of 861 older adults with no functional dependency at baseline were analyzed. Elderly individuals with multimorbidity (RR = 1.58; 95%CI: 1.19-2.10) and classified according to cardiopulmonary (RR = 2.43; 95%CI: 1.77-3.33), vascular-metabolic (RR = 1.50; 95%CI: 1.19-1.89) and mental-musculoskeletal (RR = 1.30; 95%CI: 1.03-1.65) had a higher risk of presenting functional decline in ADL in the follow-up compared to those who didn’t have the same disease patterns. Multimorbidity and its patterns increased the risk of functional disability in older adults over the nine-year period.

Resumo O objetivo foi avaliar a influência da multimorbidade e seus padrões nas atividades básicas de vida diária da pessoa idosa residente na comunidade. Trata-se de estudo de coorte com dados provenientes do Estudo FIBRA, linha de base (2008-2009) e seguimento (2016-2017). As atividades básicas de vida diária (ABVD) foram avaliadas pelo questionário de Katz e as doenças crônicas foram classificadas como (1) multimorbidade e padrões de multimorbidade: (2) cardiopulmonar; (3) vascular-metabólico; e (4) mental-musculoesquelético. Para a análise de dados, utilizou-se o teste qui-quadrado e a regressão de Poisson. Foram analisados 861 indivíduos sem limitação para ABVD na linha de base. As pessoas idosas com multimorbidade (RR = 1,58; IC95%: 1,19-2,10) e classificados nos padrões cardiopulmonar (RR = 2,43; IC95%: 1,77-3,33), vascular-metabólico (RR = 1,50; IC95%: 1,19-1,89) e mental-musculoesquelético (RR = 1,30; IC95%: 1,03-1,65) tiveram maior risco de apresentar declínio funcional nas ABVD no seguimento em comparação aos que não tinham os mesmos padrões de doenças. A multimorbidade e seus padrões aumentaram o risco de incapacidade na pessoa idosa ao longo de nove anos.

RESUMO OBJETIVO Descrever os principais resultados de estudos sobre preconceito, estereotipia e discriminação relacionados à idade (ageismo) no contexto da pandemia da covid-19. MÉTODOS Trata-se de uma revisão integrativa da literatura sobre o ageismo no contexto da pandemia da covid-19, realizada entre maio e junho de 2020, a partir das seguintes bases de dados: Medical Literature Analysis and Retrieval System Online (MEDLINE/PubMed), Web of Science (Thompson Reuters), Scopus (Elsevier Science), Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) e Scientific Eletronic Library Online (SciELO). RESULTADOS Foram analisadas 21 publicações que discorreram sobre o ageismo durante a pandemia, suas origens, consequências e implicações ético-políticas. As publicações identificadas são de natureza teórica com abordagem crítico-reflexiva, sendo 90,5% artigos opinativos (n = 19) e 9,5% de pesquisa (n = 2). Os principais resultados encontrados apontam críticas em relação à destinação de recursos e cuidados intensivos baseados exclusivamente no critério etário. São também apontados os impactos do isolamento social, o uso das tecnologias e mídias sociais e as relações intergeracionais no cenário da covid-19. CONCLUSÃO A maioria das publicações indicam que o ageismo sempre esteve presente, mas tornou-se mais evidente durante a pandemia da covid-19 como forma de discriminação contra idosos. Ressalta-se que discursos “ageistas” podem influenciar negativamente na vida dos idosos e causar impactos sociais e psicológicos prejudiciais.

ABSTRACT OBJECTIVE To report the main results of studies on prejudice, stereotyping, and age-based discrimination (ageism) in the context of the COVID-19 pandemic. METHODS This is an integrative review of the literature on ageism in the context of the COVID-19 pandemic, conducted between May and June 2020, with data collected from the following databases: Medical Literature Analysis and Retrieval System Online (MEDLINE/PubMed), Web of Science (Thompson Reuters), Scopus (Elsevier Science), Literatura Latino-Americana e do Caribe em Ciências da Saúde (Lilacs) and Scientific Eletronic Library Online (SciELO). RESULTS Twenty-one publications addressing ageism during the pandemics, its origins, consequences, and ethical and political implications were analyzed. All publications were theoretical with a critical/reflexive approach, being 90,5% opinion articles (n = 19) and 9,5% research (n = 2). The main findings indicate criticisms regarding resources allocation and intensive care based exclusively on age. The results also highlight the impacts of social isolation, the use of technologies and social media, and intergenerational relationships within the COVID-19 scenario. CONCLUSION According to most publications, although ageism has always been present, it became more evident during the COVID-19 pandemic as a form of discrimination against older adults. “Ageist” discourses may exert a negative influence in older adults’ lives, causing severe social and psychological impacts.

RESUMO OBJETIVO Descrever os principais resultados de estudos sobre preconceito, estereotipia e discriminação relacionados à idade (ageismo) no contexto da pandemia da covid-19. MÉTODOS Trata-se de uma revisão integrativa da literatura sobre o ageismo no contexto da pandemia da covid-19, realizada entre maio e junho de 2020, a partir das seguintes bases de dados: Medical Literature Analysis and Retrieval System Online (MEDLINE/PubMed), Web of Science (Thompson Reuters), Scopus (Elsevier Science), Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) e Scientific Eletronic Library Online (SciELO). RESULTADOS Foram analisadas 21 publicações que discorreram sobre o ageismo durante a pandemia, suas origens, consequências e implicações ético-políticas. As publicações identificadas são de natureza teórica com abordagem crítico-reflexiva, sendo 90,5% artigos opinativos (n = 19) e 9,5% de pesquisa (n = 2). Os principais resultados encontrados apontam críticas em relação à destinação de recursos e cuidados intensivos baseados exclusivamente no critério etário. São também apontados os impactos do isolamento social, o uso das tecnologias e mídias sociais e as relações intergeracionais no cenário da covid-19. CONCLUSÃO A maioria das publicações indicam que o ageismo sempre esteve presente, mas tornou-se mais evidente durante a pandemia da covid-19 como forma de discriminação contra idosos. Ressalta-se que discursos “ageistas” podem influenciar negativamente na vida dos idosos e causar impactos sociais e psicológicos prejudiciais.

ABSTRACT OBJECTIVE To report the main results of studies on prejudice, stereotyping, and age-based discrimination (ageism) in the context of the COVID-19 pandemic. METHODS This is an integrative review of the literature on ageism in the context of the COVID-19 pandemic, conducted between May and June 2020, with data collected from the following databases: Medical Literature Analysis and Retrieval System Online (MEDLINE/PubMed), Web of Science (Thompson Reuters), Scopus (Elsevier Science), Literatura Latino-Americana e do Caribe em Ciências da Saúde (Lilacs) and Scientific Eletronic Library Online (SciELO). RESULTS Twenty-one publications addressing ageism during the pandemics, its origins, consequences, and ethical and political implications were analyzed. All publications were theoretical with a critical/reflexive approach, being 90,5% opinion articles (n = 19) and 9,5% research (n = 2). The main findings indicate criticisms regarding resources allocation and intensive care based exclusively on age. The results also highlight the impacts of social isolation, the use of technologies and social media, and intergenerational relationships within the COVID-19 scenario. CONCLUSION According to most publications, although ageism has always been present, it became more evident during the COVID-19 pandemic as a form of discrimination against older adults. “Ageist” discourses may exert a negative influence in older adults’ lives, causing severe social and psychological impacts.

Resumo Objetivo Identificar a prevalência de dor crônica em idosos acima de 70 anos de idade e as relações diretas e indiretas entre dor crônica e variáveis sociodemográficas e de condições de saúde. Método Estudo transversal, realizado com 419 idosos de 72 anos ou mais, entre 2016 e 2017. Os participantes são provenientes do estudo de seguimento do Estudo FIBRA, que incluiu idosos não institucionalizados residentes da zona urbana dos municípios de Campinas e Ermelino Matarazzo, do estado de São Paulo, Brasil. A variável mediadora foi dor crônica, avaliada positivamente pelo autorrelato da presença de dor nos últimos seis meses. As variáveis independentes contempladas foram: sociodemográficas, comportamentos relacionados à saúde, multimorbidade, sintomas depressivos, insônia e autoavaliação de saúde. As relações diretas e indiretas foram testadas por meio da análise de caminhos. Resultados 57,0% da população estudada relatou dor crônica. O sexo feminino, o Índice de Massa Corporal (IMC) elevado, a multimorbidade e os sintomas de insônia e de depressão apresentaram associação direta com dor crônica. A dor crônica figurou como variável mediadora das associações entre autoavaliação de saúde e gênero, IMC, multimorbidade e sintomas de insônia. Conclusão Os dados mostram uma rede de interações da dor crônica com variáveis sociodemográficas e de condições de saúde. Esse conhecimento poderá beneficiar o manejo e o cuidado à pessoa idosa acometida por dor crônica.

Abstract Objective Identify the prevalence of chronic pain in individuals older than 70 years of age and identify relations between chronic pain and both sociodemographic and health-related characteristics to determine the role of chronic pain as a mediator between these variables in relation to self-rated health. Methods A cross-sectional study was conducted with 419 individuals aged 72 years and older, between the years of 2016 and 2017. The participants were from the follow-up of the FIBRA Study, which included non-institutionalized older adults living in urban areas of the cities of Campinas and Ermelino Matarazzo in the state of São Paulo, Brazil. The mediating variable was chronic pain, which was assessed by the self-report of the presence of pain in the previous six months. The independent variables were sociodemographic characteristics, health-related behaviors, multimorbidity, depressive symptoms, insomnia and self-rated health. Direct and indirect relations were tested using path analysis. Results A total of 57.0% of the sample reported chronic pain. The female gender, a high body mass index (BMI), multimorbidity, insomnia, and depressive symptoms were directly associated with chronic pain. Chronic pain figured as a mediator variable in the associations between self-rated health and gender, BMI, multimorbidity, and symptoms of insomnia. Conclusion Data demonstrate a complex network of interactions between chronic pain and both sociodemographic and health-related characteristics. Such knowledge can benefit the management and care of the older adults affected with chronic pain.

Resumo Objetivos investigar a relação entre número de doenças crônicas e autoavaliação de saúde/capacidade funcional em relação a sexo e diferentes níveis educacionais. Métodos foi realizado um estudo transversal com 419 idosos que haviam participado do estudo FIBRA, o qual investiga fragilidade em indivíduos idosos. Foram avaliadas variáveis sociodemográficas, doenças crônicas não transmissíveis, autoavaliação de saúde e capacidade funcional. Foi utilizado o teste qui-quadrado ou exato de Fisher para testar as associações entre número de doenças e autoavaliação de saúde e capacidade funcional, com nível de significância de 5%. Resultados A autoavaliação de saúde negativa foi significativamente associada com número de doenças crônicas na amostra geral, no sexo feminino e em ambas as categorias de escolaridade. Por outro lado, relatar dependência parcial ou total para realizar uma ou mais atividades instrumentais de vida diária (AIVDs) apresentou associação significativa para número de doenças crônicas na amostra completa, sexo feminino e 0 a 4 anos de escolaridade. Conclusão as doenças crônicas possuem um impacto negativo na autoavaliação de saúde, especialmente em mulheres e em relação aos anos de escolaridade; e na dependência funcional para AIVDs, especialmente em mulheres e pessoas com 0 a 4 anos de escolaridade.

Abstract Objectives To investigate the relationship between diseases and self-rated health / functional capacity between gender and in different educational levels. Methods A cross-sectional study was conducted with follow-up of 419 older adults who participated in the FIBRA Study, which investigated frailty in aged individuals. Socio-demographic variables, chronic non-communicable diseases, self-rated health and functional capacity were evaluated. Chi-square test or Fisher’s exact test were used to test associations between the number of diseases and self-rated health and functional capacity, with the significance level set to 5%. Results Negative self-rated health was significantly associated with the number of chronic diseases in the overall sample, among women and in both schooling categories. Having partial or total dependency on at least one or more instrumental activities of daily living (IADLs) showed a significant association for number of chronic diseases in the overall sample, among women and among individuals with 0 to four years of schooling. Conclusion The chronic diseases seem to have a negative impact on self-rated health, especially in women and in relation to years of schooling, and they seem to have a functional disability in relation to instrumental activities of daily living, especially in women and the old people with 0 to 4 years of schooling.

In this article was developed a green synthesis of CuO nanoparticles on vegetal activated carbon (VAC), using pomegranate leaf extract as reducing and stabilizing agent in the removal of multiple pollutants. The impregnated carbons with CuO nanoparticles were characterized morphologically and structurally. The SEM and XRD analysis, after carbons modification, showed that the surface structure remained porous with CuO nanoparticles sizes between 40 and 78 nm. As concern to the contaminants atrazine, caffeine and diclofenac, it is observed that the maximum adsorption capacities practically did not suffer interference by the presence of 1.5% Cu nanoparticles, keeping their values very close to those obtained with pure carbon. The nitrate removal was favored by the impregnation of CuO nanoparticles, from 0.93 mg g-1 to 4.09 mg g-1. The results are promising and demonstrate that it is possible to obtain VAC impregnated whit nanoparticles of CuO by a non-polluting and low cost method.

Resumo Objetivo: Analisar a associação entre o declínio da mobilidade de idosos da comunidade em São Paulo, SP, Brasil, com a sua capacidade de utilização do transporte público e seu impacto na qualidade de vida e participação social. Método: Foi realizado um estudo transversal no qual foram incluídos 32 idosos, de ambos os sexos (59% mulheres), com média de idade de 75,5 anos (±9,2). Os participantes foram avaliados em relação a mobilidade funcional, risco de quedas, medo de cair, independência nas atividades de vida diária e na vida social. Além disso, foi avaliada a percepção dos idosos sobre a mobilidade no transporte público e o seu impacto na sua participação social. Os idosos foram divididos em dois grupos: sem deficiência de mobilidade e com deficiência de mobilidade. Os grupos foram comparados por meio dos testes: exato de Fisher, qui-quadrado, Mann-Whitney e o teste t de Student não pareado. Foi adotado alfa de 0,05 como nível de significância estatística. Resultado: Idosos com maior comprometimento da mobilidade apresentaram maior dificuldade para acessar o transporte público e maior número de quedas durante a sua utilização. Os idosos que relataram ter dificuldade em acessar o transporte público sofreram maior impacto na participação social e na qualidade de vida. Conclusão: Idosos com maior comprometimento da mobilidade apresentam maior número de queixas relacionadas ao transporte público. Além disso, sofrem maior impacto na participação social caracterizado pela limitação na capacidade de deslocamento de forma independente pela cidade, o que limita suas atividades sociais.

Abstract Objective: To analyze the association between the decline in the mobility of community dwelling elderly persons in São Paulo, Brazil and their capacity to use public transportation, and its impact on their quality of life and social participation. Method: A cross-sectional study was conducted of 32 community dwelling elderly persons, of both genders (59% female), with an average age of 75.5 years (±9.2). The participants were evaluated by functional mobility, risk of falls, fear of falls and independence in activities of daily living. In addition, the perception of the elderly persons of their mobility on public transport and its impact on their social participation was evaluated. The elderly persons were divided into two groups: with mobility impairment and without mobility impairment. The groups were compared using the Fisher's Exact, Chi-Squared and Mann-Whitney tests, and the unpaired Student's t-test. An alpha level of 0.05 was adopted as a level of statistical significance. Result: Elderly persons with greater mobility impairment exhibited greater difficulty accessing public transport and a greater number of falls during their use of the same. Elderly persons who reported difficulty accessing public transport suffered greater impact on their social participation and quality of life. Conclusion: Elderly persons with greater mobility impairment had a greater number of complaints related to public transport. Additionally, they suffered a greater impact on their social participation, characterized by limitations in their capacity for independent movement around the city, limiting their social activities.

Inorganic nanoparticles incorporation in polymer membranes for filtration processes has attracted the attention of researchers in order to improve in some ways their performance. In this work, AgNPs were synthesized "in situ" in cellulose acetate (CA) membrane by chemical reduction of a silver salt. The membranes were prepared by the nonsolvent induced phase inversion method. Asymmetric membranes without (CA-M) and with adsorbed AgNPs (CA-Ag-M) were obtained. Ultrafiltration properties were confirmed for both membranes (16 nm of average pore diameter) and average crystallite size of 21 nm for the adsorbed AgNPs was computed. Contact angle measured with Milli-Q water and dry CA-Ag-M is near zero while for the CA-M is around 80°. The CA-M showed water permeability of 214 Lh-1m-2, while the CA-Ag-M permeability was 1651 Lh-1m-2.

Resumo Objetivo: Avaliar o efeito de um programa de treinamento sobre o equilíbrio semiestático de idosos, comparando a forma de aplicação supervisionada em grupo e individual domiciliar. Método: Ensaio clínico cego randomizado controlado com múltiplos braços. Idosos randomizados em Grupo Supervisionado (GS; n=18); Grupo Domiciliar (GD; n=20) e Grupo Controle (GC; n=18). O GS e o GD participaram do treinamento por 10 semanas, duas vezes por semana. O equilíbrio foi avaliado pela posturografia [variáveis velocidade e amplitude média antero-posterior (AP) e médio-lateral (ML)] nas situações: plataforma fixa olhos abertos (PFOA), plataforma fixa olhos fechados (PFOF), tandem olhos abertos (Tandem OA), tandem olhos fechados (Tandem OF) e Unipodal. ANOVA two-way e post-hoc de Tukey foram utilizados nos dados paramétricos, teste de Friedman e post-hoc de Wilcoxon para análise intragrupos e teste de Kruskal-Wallis e post-hoc de Mann-Whitney para análise intergrupos. Resultados: Na análise intragrupo, o GD apresentou melhora na oscilação corporal pós-treinamento nas posições Tandem OF (velocidade e amplitude média AP) e Unipodal (amplitude média ML). O GS apresentou piora na posição Tandem OA em todas as variáveis. Na análise intergrupo, o GD apresentou melhora na posição PFOA (amplitude média ML), Tandem OF (velocidade média ML) e Unipodal (amplitude média AP e ML). Já o GS apresentou melhora na posição PFOA (amplitude média ML) e Unipodal (amplitude média AP), contudo apresentou piora na posição PFOA (variável velocidade média AP) e na Tandem OA (amplitude média AP). Conclusão: Os exercícios proporcionaram benefícios para o equilíbrio dos idosos investigados, embora o GD tenha apresentado os melhores resultados. REBEC: RBR-3S9M65.

Abstract Objective: The aim of the present study was to evaluate the influence of a balance training program on the semi-static balance of elderly persons by comparing a supervised group with individual home-based application. Method: A blinded randomized controlled multi-arm trial was conducted. The elderly individuals were randomized into: Supervised Group (SG; n=18); Domiciliary Group (DG; n=20) and Control Group (CG; n=18). The SG and DG participated in twice weekly training sessions for 10 weeks. A posturography evaluation was performed based on velocity, anterior-posterior (AP) and medial-lateral (ML) medial amplitude variables in firm surface with eyes open (FSEO) and closed (FSEC), tandem stance with eyes open (Tandem EO) and closed (Tandem EC), and single-leg stance (SL) situations. Two-way ANOVA and Tukey's post-hoc were used for parametric data, the Friedman and Wilcoxon post-hoc tests were used for intragroup analysis and the Kruskal-Wallis and Mann-Whitney post-hoc tests were used for intergroup analysis. Results: In intergroup analysis, the DG group showed improvement in body sway in the Tandem EC (velocity and medial amplitude AP) and single-leg stance (medial amplitude ML) situations. The SG showed a decline in the Tandem EO situation in all the variables. In intergroup analysis, the DG showed improvement in the FSEO position (medial amplitude ML), in the Tandem EC position (medial velocity ML), and the single-leg stance position (medial amplitude AP and ML). The SG showed improvement in the FSEO position (medial amplitude ML) and the single-leg stance position (medial amplitude AP), but showed a decline in the FSEO (variable medial velocity AP) and Tandem EO position (medial amplitude AP). Conclusion: The exercises were beneficial for the balance of the elderly individuals, with the DG presenting the best results. REBEC: RBR-3S9M65.

Poly(glycolide-co-lactide) (PLGA) nanospheres containing magnetic materials have been extensively studied because of its biomedical applications. Therefore, it is very important to know thermal properties of these materials in addition to other physical properties. Thermal degradation activation energy (Eα) of PLGA nanospheres with maghemite entrapment (PLGA-Mag), PLGA nanospheres (hollow spheres) (PLGA-H) obtained by an emulsion method and unprocessed PLGA (PLGA-R) were calculated by isoconversional Vyazovkin method based on data of TG analysis in order to evaluate modifications in thermal behavior caused by nanospheres obtainment process or by maghemite entrapment. Both hydrodynamic diameter in the range of 200-250 nm and polydispersity index lower than 0.3 are considered satisfactory. Thermal degradation of PLGA-R begins at higher temperatures than those of PLGA-H and PLGA-Mag, but processed samples presented increase in thermal stability, which was greater before processing by emulsion and in the presence of the magnetic materials. PLGA-Mag presents superparamagnetic behavior at room temperature.

New techniques for treating wastewater, particularly the removal or degradation of organic pollutants and heavy metals, among other pollutants, have been extensively studied. The use of nanostructured iron oxides as adsorbent and photocatalyst for the removal of these contaminants has proved a promising approach, not only because of their high treatment efficiency, but also for their cost-effectiveness, having the flexibility for in situ and ex situ applications. In this review, we briefly introduced the most used kinds of iron oxide nanoparticles, some synthesis techniques for iron oxide nanostructure formation, their potential benefits in environmental clean-up, and their recent advances and applications in wastewater treatment. These advances range from the direct applications of synthesized nanoparticles as adsorbents for removing toxic contaminants or as catalysts to oxidize and break down noxious contaminants (including bacteria and viruses) in wastewater, to integrating nanoparticles into conventional treatment technologies, such as composite photocatalytic filters (membranes, sand and ceramic) that combine separation technology with photocatalytic activity. Finally, the impact of nanoparticles on the environment and human health is briefly discussed.