New generation nano-adsorbents for the removal of emerging contaminants in water

Basheer, Al Arsh

doi:10.1016/j.molliq.2018.04.021

Cited by 422 publications

(98 citation statements)

References 111 publications

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“…Biological AMD treatment by SRB is an example of an environmentally friendly technology to both ameliorate the effluent quality and open the possibility for the development of new products with aggregated value. Previous studies applying the biological AMD treatment by SRB, showed the potential for metal sulfide nanoparticle synthesis [6], which can be used as adsorbents, due to their small size, high reactivity, and large surface energy; with quick sorption capacity [7], solar cells components due to its optical activities [8], and fungicide beyond other industrial applications [9].…”

Section: Introductionmentioning

confidence: 99%

Covellite (CuS) Production from a Real Acid Mine Drainage Treated with Biogenic H2S

Silva

Lucheta

Bitencourt

et al. 2019

Metals

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Acid Mine Drainage (AMD) is an environmental problem associated with mining activities, which resulted from the exposure of sulfur bearing materials to oxygen and water. AMD is a pollution source due to its extreme acidity, high concentration of sulfate, and soluble metals. Biological AMD treatment is one alternative to couple environmental amelioration for valuable dissolved metals recovery, as a new source of raw materials. Covellite (CuS) particles were synthetized from an AMD sample collected in a Brazilian copper mine, after 48 and 96 h of exposure to hydrogen sulfide (H 2 S) produced in a bioreactor containing acidophilic sulfate reducing bacteria (SRB). The time of exposure affected the morphology, nucleation, and size of CuS crystals. CuS crystals synthetized after 96 h of H 2 S exposure showed better ordination as indicated by sharp and intense diffractograms obtained by X-ray diffraction (XRD), and the predominance of placoid sheets with hexagonal habit structure as observed by scanning electrons microscopy (SEM). Energy dispersive X-ray fluorescence (EDXRF) spectrometry indicated a Cu:S molar ratio in agreement with CuS. Granulometric analysis demonstrated that 90% of CuS particles were less than 22 µm size. AMD biological treatment is a potential economical CuS recovery option for metallurgical process chain incorporation, or new industrial applications, since the alteration of synthesis conditions can produce different crystal forms with specific characteristics.

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Section: Introductionmentioning

confidence: 99%

Covellite (CuS) Production from a Real Acid Mine Drainage Treated with Biogenic H2S

Silva

Lucheta

Bitencourt

et al. 2019

Metals

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“…The pH of the dye solution plays an essential role in the entire adsorption process and the adsorption capacity, influencing the loads of the NZVI-DE and DE. This changes the degree of ionization and dissociation of the functional groups in the active sites of the adsorbent materials (Basheer, 2018). At the beginning, the pH of the treatments was 7.4, however at the end of the removal experiments, NZVI-DE-1 had 8.9; and NZVI-DE-2 had 8.7; while NZVI had a more neutral pH of 7.7; and DE-1 and 2 had an acid pH of 4 and 4.6., respectively.…”

Section: Resultsmentioning

confidence: 99%

Using nano zero valent iron supported on diatomite to remove acid blue dye: synthesis, characterization and toxicology test

Justo-Cabrera

Flores-Rojas

Schnabel

et al. 2019

Preprint

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Using nano zero valent iron supported on diatomite to remove acid blue dye: 46 synthesis, characterization and toxicology test 47 48 49 50 Abstract 51The aim of this work was to synthesize and characterize nanoscale zero-valent iron 52 (NZVI) supported on diatomaceous earth (DE) at two different molar concentration 3 M 53 and 4M (nZVI-DE-1 nZVI-DE-2), to test the decolorization treatment of acid blue dye 54 (AB) and perform a toxicological test using zebrafish. The synthesis of the nanoparticles 55 was obtained using the chemical reduction method and the material was characterized by 56 X-ray diffraction, Scanning Electron Microscopy (SEM), Energy-Dispersive X-Ray 57 (EDX), and transmission electron microscopy and Specific Surface Area (BET). The 58 results showed spherical forms in clusters between 20 to 40 nm of zero valent iron 59 supported on diatomaceous earth. The removal of 1 g/l of AB from water treated with 60 NZVI-DE-1 and NZVI-DE-2 reached the decolorization of 90% and 98% of all dye. 61While controls like NZVI and DE-1 and DE-2 achieved the removal of 40, 37 and 24 % 62 of the dye. Toxicological analysis using zebrafish showed that AB causes a severe defect 63 in development and embryos die after exposure. However, the water samples treated with 64 NZVI-DE-1 and NZVI-DE-2 are not harmful for the zebrafish embryos during the first 65 24 hours. We conclude that the use of NZVI-DE-1 and NZVI-DE-2 is a promising 66 treatment for dye pollution. 67 68 69 Keywords: nanoparticles, water treatment, dyes, zero-valent iron, acid blue 70 71 72The concentration of dyes in industrial effluents can reach 500 mg/L and pollute local 73 freshwater, reducing the efficiency of sunlight and thereby impeding the process of 74 photosynthesis. (Jung et al., 2016). As a result, the water temperature of the stream 75 decreased, and photoautotrophs organism like algae, euglena, and cyanobacteria could no 76 longer survive (Bide, 2007). The death of these organisms is an ecological loss because 77 they play an essential role in the cycle of nutrients and are capable of absorbing organic 78 matter present in the stream. They can also remove carbon dioxide from the atmosphere, 79 are an indispensable source of food and oxygen for several organisms (Callieri, 2014). 80Pollution due to synthetic dyes also affects the health of aquatic and terrestrial organisms 81 (Samchetshabam et al., 2017). 82Acid blue (AB) was selected for this study because it is used widely by the industrial 83 sector, including for cosmetics, food coloring or for dyeing different fibers, and is 84 commonly mixed with sulfuric acid to make it more soluble before industrial application 85 thereby increasing the toxicity (Ammar et al., 2006). AB is not only toxic for aquatic life 86 but can also cause skin irritation, cornea damage, and promote the development of tumors 87 and cancer (Khelifi et al., 2008). 88 Several kinds of research have been carried out with the aim of removing dyes from water 89 using aerobic or anaerobic degradation, filtration, adsorption,...

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“…These nanoparticles are developed and used to remove different types of contaminants. This kind of material have important characteristics, such as, catalytic potential, small size, high reactivity, and large surface energy (BASHEER et al, 2018). They can be classified based on their adsorption process, which includes metallic nanoparticle, nanostructured mixed oxides, magnetic nanoparticles and metallic oxide nanoparticles (ANJUM et al, 2016).…”

Section: Nanotechnologymentioning

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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New generation nano-adsorbents for the removal of emerging contaminants in water

Cited by 422 publications

References 111 publications

Covellite (CuS) Production from a Real Acid Mine Drainage Treated with Biogenic H2S

Covellite (CuS) Production from a Real Acid Mine Drainage Treated with Biogenic H2S

Using nano zero valent iron supported on diatomite to remove acid blue dye: synthesis, characterization and toxicology test

Applications of Nanotechnology in Water Treatment

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