The remediation of contaminated soil and water is a relevant topic, being the focus of intense research. The use of nanoparticles to degrade contaminants has been consolidated as a sustainable remediation technology, with promising results worldwide. In this scenario, the zero-valent iron nanoparticles (nZVI) which, due to their properties, prove to be an important element to be used in remediation techniques, in addition to being efficient and low cost. In this article the objective is to present a bibliographic review on nanotechnology applied to soil and groundwater remediation, especially the application of nZVI, considering its main characteristics, reactivity performance, pollutants that can be degraded, application and transport techniques and main advantages and disadvantages. Issues related to toxicity and factors related to in situ applications are also presented. It is considered the results that have been observed, there is feasibility for the research to intensify even more, due to the efficiency of this nanomaterial on pollutants present in soils and waters, and it is important to expand the studies in Brazilian soils, since most of the research is international, and it is not possible to directly transfer knowledge acquired from temperate soils to residual soils of tropical and subtropical climate.

Abstract Adequate preparation, learning, and training is required for Sales and Operations Planning (S&OP) to aid organizations in achieving the full expected benefits from its implementation. This paper presents a case method for S&OP and the learning experience of its application at the University of Münster (Germany). The “constructive alignment principle” was applied with a “team teaching” approach, involving an executive from the case company. Students improved their knowledge on S&OP and their analytical skills by understanding the conceptual S&OP building blocks and by learning how to deal with them to provide a solution for a case based on a real-life situation. The learning results were evaluated positively during the discipline’s student evaluation of teaching (SET). The applied case method enhanced the student’s motivation and engagement (e.g., higher preparation effort and class attendance), which were considered higher than in other disciplines with the traditional lecture-based education.

A utilização de resíduos e subprodutos industriais na construção civil apresenta-se como uma alternativa efetiva para diminuição do impacto ambiental deste setor. O presente trabalho tem como principal objetivo avaliar a viabilidade do emprego de solo-cimento e resíduo de beneficiamento de pedras preciosas em estacas escavadas (SCR) para utilização em habitação unifamiliar. Inicialmente foi definida uma mistura ótima com os materiais que constituiriam as estacas. A mistura que melhor atendeu as características de resistência e trabalhabilidade foi àquela composta por 50% de resíduo de beneficiamento de pedras preciosas e 50% de solo, com 10% de teor de cimento Portland, em relação a massa seca dos materiais. Para os ensaios de campo foram executadas três estacas escavadas de 0,23m de diâmetro e 3 metros de profundidade. Os resultados obtidos através das provas de carga estática foram comparados a resultados de estacas escavadas com mesmas características geométricas e compostas por concreto convencional. O estudo concluiu que o emprego da mistura de solo-cimento e resíduo de beneficiamento de pedras preciosas em estacas escavadas moldadas in loco é tecnicamente viável, uma vez que apresentam capacidade de carga semelhante às executadas com concreto convencional. Além disso, a partir da análise de custos, onde se comparou o valor de execução para estacas de concreto e estacas de solo-cimento e resíduo, verificou-se que o custo final de uma estaca escavada produzida com a mistura proposta apresenta uma economia de 38%, se comparado ao custo final de uma estaca escavada composta por concreto convencional.

The use of residues and industrial by-products in construction is an effective alternative for reducing environmental impact of this sector. The aim of this study is to evaluate the feasibility of using soil-cement and residue from precious stones in bored piles for housing construction. The mixture that presented the best strength and workability characteristics consisted of 50% residues, 50% soil and 10% Portland cement (in dry weight of materials). For the field tests, three bored piles measuring 0.23 m in diameter and 3 meters in depth were executed. The results obtained using static load tests with soil-cement and residue piles were compared with results of bored piles with the same geometrical characteristics and made with conventional concrete. The study concluded that it is technically feasible to use the mixture of soil-cement and the residue of precious stones for bored piles, since the load capacity is similar to that of those performed by conventional concrete. In addition, the cost analysis showed that the final price of a bored pile made with soil-cement and residue is up to 38% lower than the price of those made with traditional concrete.