Social, Environmental and Ethical Impacts of Nanotechnology

Purohit, Rajesh; Mittal, Aditya; Dalela, Srajan; Warudkar, Vilas; Purohit, Kiran; Purohit, Surabhi

doi:10.1016/j.matpr.2017.05.058

Cited by 46 publications

(24 citation statements)

References 6 publications

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“…Also, the period that the particle remains in the ecosystems reflects in its toxicity, the longer the period, the more toxic it becomes (PUROHIT et al, 2017) many trophic chains, are exposed to nanomaterials, many severe effects could occur on the whole trophic chain (MOTTIER et al, 2017).…”

Section: Potential Risks To the Environmentmentioning

confidence: 99%

Applications of Nanotechnology in Water Treatment

Machado

Rodrigues

Feksa

et al. 2019

RCO

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The industrial contamination, along with domestic effluents, agricultural and urban runoff are contaminating rivers and making it difficult for conventional water treatment to remove all the pollutants. This contamination can impact in the quality of rivers, in the quality of life of aquatic animals and can impact in the human health through the consumption of water. In order to improve the water quality, nanotechnology has been studied as an alternative to better remove contaminants, such as, heavy metals, oily water separation and antimicrobial activity. Besides, with the increase in industrialization along with the contamination of rivers, seawater could be an interesting alternative for drinking water source after adequate treatment. Nanomaterials are being studied as a possibility to remove salt from seawater, making it possible to drink. Howerver, there is a need to elucidate the potential risks to the environemt that these nanomaterials can cause. Therefore, the aim of this review is to describe some applications of nanotechnology in water treatment regarding metals, oil removal from water, antimicrobial activity and desalination in order to improve water quality, as well, as discuss their potential risk to the environment. RESUMOA contaminação industrial, juntamente com efluentes domésticos, agricultura e escoamento urbano, estão contaminando os rios e dificultando para os tratamentos de água convencionais removerem todos os poluentes. Esta contaminação pode impactar na qualidade dos rios, na qualidade de vida dos animais marinhos e pode impactar na saúde humana através do consumo de água. Com a finalidade de melhorar a qualidade da água, a nanotecnologia tem sido estudada como uma alternativa para melhor remover os poluentes, como, metais pesados, separar óleo da água e atividade antimicrobiana. Além disso, com o aumento da industrialização juntamente com a contaminação dos rios, a água do mar poderia ser uma alternativa interessante como fonte de água potável após o tratamento adequado. Nanomateriais estão sendo estudado como uma possibilidade para remover o sal da água do mar, tornando-a possível de ser ingerida. Entretanto, há a necessidade de elucidar os potenciais riscos para o meio ambiente que estes nanomateriais podem causar. Sendo assim, o objetivo deste artigo de revisão é descrever algumas aplicações da nanotecnologia no tratamento de água em relação à remoção de metais e óleo da água, atividade antimicrobiana e a dessalinização a fim de melhorar a qualidade da água, assim como, discutir os potenciais riscos para o meio ambiente. Palavras-chave: Atividade antimicrobiana. Contaminação da água. Nanotecnologia. Poluentes. Riscos ambientais.

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Section: Potential Risks To the Environmentmentioning

confidence: 99%

Applications of Nanotechnology in Water Treatment

Machado

Rodrigues

Feksa

et al. 2019

RCO

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“…In turn, there are doubters and sceptics who point that toxic materials are used in the production of nanostructures and that industrial scale production of nanostructures is far-fetched. The manufacturing process is resource-and energy-intensive (Purohit, et al, 2017).…”

Section: Nanotechnologymentioning

confidence: 99%

Development: Crossing the Bridge Pondering Socio-Economic and Techno-Science

2019

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Applied science, society needs and economy development are three main pillars of the technology progress nowadays. As they are quite independent of each other they have their own path for advancing. Nevertheless, science, society and economy should bring the world in the Future together. It is stated that there is a strong need for pondering these advancing sciences, because they affect one another and so they may increase their effectiveness. Several techno-science empirical observations seem to support the hypothesis that interaction and reciprocal influence is necessary with social and economic sciences.

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“…As nanopartículas podem ser utilizadas em diferentes áreas, como na indústria de cosméticos, integrando novos produtos, indústria farmacêutica, na tecnologia da informação e comunicação, na indústria automobilística, na síntese química, na purificação da água, em aplicações elétricas e magnéticas, na indústria alimentícia e na biotecnologia (Purohit et al, 2017).…”

Section: Aplicações E Impactos Das Nanopartículasunclassified

“…Na indústria alimentícia, as nanopartículas são utilizadas para aprimorar o acondicionamento dos produtos, aumentando a vedação das embalagens e reduzindo o gasto com matérias primas. Ademais, alimentos frescos e vegetais podem ser protegidos de odores, umidade e gases através do uso de nanopelículas comestíveis (Purohit et al, 2017). Segundo Purohit et al (2017), já existem muitos produtos alimentícios disponíveis no mercado que contêm nanopartículas de nutracêuticos (nutrientes específicos presentes nos alimentos com capacidade de tratar doenças) em cápsulas e nanocápsulas de sabores.…”

Section: Aplicações E Impactos Das Nanopartículasunclassified

“…Como exemplo desse processo há a técnicas de aglomeração de átomos e moléculas e síntese biológica através de bactérias, leveduras, fungos e algas (Khan et al, 2017). O primeiro método é preferível para aplicações industriais, enquanto o segundo é aconselhável quando se deseja nanoestruturas com precisão atômica (Purohit et al, 2017). As propriedades associadas a nanoestrutura variam conforme a rota e os precursores adotados para a síntese (Iqbal et al, 2012).…”

Section: Introductionunclassified

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Modelagem matemática da separação de nanopartículas em campo elétrico

Borges¹

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In recent decades, has been a growing interest in study of nanotechnology applied to engineering systems and related fields. This is due to numerous applications that can be developed, including employment in chemical and pharmaceutical industries, in separation processes and in different fields of medicine. Thus, characterizing a nanoparticle stream with respect to its particle size distribution has fundamental importance in order to understand how they may interfere with people's daily lives. For this purpose, one of the used devices is the Differential Mobility Analyzer (DMA). In general, DMA is based on electric mobility technique, which consists in separating charged particles with a certain charge when crossing a specific electric field. Thus, for each particle size running through the equipment, a different profile is observed, and only particles with a certain size range will be collected in the DMA classification slit, obtaining a monodisperse aerosol stream from a polydisperse stream at the equipment entrance. The main objective of this study is to propose a systematic methodology for the characterization of the aerosol flow at entrance of two DMAs equipment, designed and built at FEQUI/UFU, by formulating and solving an inverse problem using the Differential Evolution (DE) algorithm. For this, the experimental data reported by Gomes (2018) and Camargo (2019) for different saline concentrations in polydispersed aerosol were considered, which were treated using methodologies present in literature, as well as new approaches proposed in this study. The results showed that the DMA devices used could be treated by the proposed models, identifying the potential of these devices to be adopted as an alternative to commercial equipment; as well as the convergence potential of the DE tool for the same solution from different runs. In addition, one of the adopted models showed the ability to estimate the particle size distribution for a given inlet aerosol intermediate concentration from information of two other concentrations.

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Social, Environmental and Ethical Impacts of Nanotechnology

Cited by 46 publications

References 6 publications

Applications of Nanotechnology in Water Treatment

Applications of Nanotechnology in Water Treatment

Development: Crossing the Bridge Pondering Socio-Economic and Techno-Science

Modelagem matemática da separação de nanopartículas em campo elétrico

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