In situ fabrication of dynamic nano zero-valent iron/activated carbon nanotubes membranes for tellurium separation

Yu, Hanqiang; Zhang, Tao; Jing, Zhou; Xu, Jicheng; Qiu, Fengxian; Yang, Dongya; Long, Yu

doi:10.1016/j.ces.2019.05.012

Cited by 46 publications

(6 citation statements)

References 32 publications

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“…The next step, to attach the Fe2+ ions to the surface of the membrane, the ACNTs membrane was first immersed in 75 ml of FeSO4 solution of concentration 0.1 mol l −1 , after which the same volume NaBH4 of 3 mol l −1 concentration is added to the solution at the rate of 2 drops per second. The entire procedure took place in a nitrogen environment to prevent NZVI from oxidation [47].…”

Section: Preparation Of Functionalized and Modified Cnts By Nano-zero...mentioning

confidence: 99%

A review of the function of using carbon nanomaterials in membrane filtration for contaminant removal from wastewater

Chadha

Selvaraj

Thanu

et al. 2022

Mater. Res. Express

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Water is a necessity for all living and non-living organisms on this planet. It is understood that clean water sources are decreasing by the day, and the rapid rise of Industries and technology has led to an increase in the release of toxic effluents that are discharged into the environment. Wastewater released from Industries, agricultural waste, and municipalities must be treated before releasing into the environment as they contain harmful pollutants such as organic dyes, pharmaceuticals wastes, inorganic materials, and heavy metal ions. If not controlled, they can cause serious risks to human beings' health and contaminate our environment. Membrane filtration is a proven method for the filtration of various harmful chemicals and microbes from water. Carbon nanomaterials are applied in wastewater treatment due to their high surface area, making them efficient adsorbents. Carbon nanomaterials are being developed and utilized in membrane filtration for the treated wastewater before getting discharged with the rise of nanotechnology. This review studies carbon nanomaterials like fullerenes, graphenes, and CNTs incorporated in the membrane filtration to treat wastewater contaminants. We focus on these CNM based membranes and membrane technology, their properties and applications, and how they can enhance the commonly used membrane filtration performance by considering adsorption rate, selectivity, permeability, antimicrobial disinfectant properties, and compatibility with the environment.

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Section: Preparation Of Functionalized and Modified Cnts By Nano-zero...mentioning

confidence: 99%

A review of the function of using carbon nanomaterials in membrane filtration for contaminant removal from wastewater

Chadha

Selvaraj

Thanu

et al. 2022

Mater. Res. Express

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show abstract

“…There is tremendous variability amongst SPE systems, and each different extractant has advantages and disadvantages for metal recovery and purification purposes. Modern experimental sorbents range from prawn carapace 19 to bacteria, 20,21 clay minerals, 22,23 mesoporous silica, 12,24 carbon nanotubes, 25,26 and many others. The ideal adsorbent would exhibit both a high capacity and a high selectivity for the desired metal or metals and would be inexpensive, readily available/scalable, mechanically and chemically stable, and environmentally-friendly.…”

Section: Solid-phase Extractionmentioning

confidence: 99%

A perspective on developing solid-phase extraction technologies for industrial-scale critical materials recovery

2022

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“…Zero-valent iron (ZVI) is one of metallic reducing agents used the most commonly for the treatment of toxic pollutants from wastewater, and remediation of contaminated land and groundwater [6], because of it s ready availability, low cost, and high reactivity [7]. Owing to the reductive activity, convenient transport, and high adsorption efficiency, the ZVI particles show good performance in extraction of various heavy metals from wastewater, for examples Cr (VI) [8,9], Pb (II) [10], Se [11], Te [12]. On the other hand, ZVI particles also possess a significant surface area-to-weight ratio, which leads to a large density of reactive sites and contaminant removal capacity.…”

Section: Introductionmentioning

confidence: 99%

Treatment of wastewater from the flocculation process of waste cutting fluid by zerovalent iron catalyst

Le¹,

Pham²,

Hoang³

et al. 2022

Vietnam j. catal. adsorp.

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Waste cutting fluids are considered as hazardous wastes because they contain numerous different components causing environmental problems. Normally, a flocculation method is applied to treat preliminarily. However, the output wastewater still needs treating further to meet the national standards of industrial wastewater before disposal. So, this research reports the secondary treatment stage of the waste cutting fluid collected from an industrial factory in Vietnam using zero valent iron (ZVI) catalyst. This catalyst was synthesized via a redox reaction between sodium borohydride (NaBH4) and ferric chloride (FeCl3). Key factors affecting the quality of the ZVI particles such as the concentration of the NaBH4 reductant, reaction temperature, and dropping rate were investigated systematically. At the optimum synthesis conditions, viz. the NaBH4 concentration of 0.2 M, reaction temperature of 25 oC and the dropping rate of 3 ml/min, the synthesized ZVI exhibited a narrow range of particle size distribution with a mean size of 3.9 μm, followed by a high surface area, and good catalytic activity. As a catalyst for secondary treatment of the waste cutting fluid, the synthesized ZVI demonstrated a moderate chemical oxygen demand (COD) removal performance of 49%, corresponding to COD reduction for from 4023 mg/l to about 2059 mg/l.

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In situ fabrication of dynamic nano zero-valent iron/activated carbon nanotubes membranes for tellurium separation

Cited by 46 publications

References 32 publications

A review of the function of using carbon nanomaterials in membrane filtration for contaminant removal from wastewater

A review of the function of using carbon nanomaterials in membrane filtration for contaminant removal from wastewater

A perspective on developing solid-phase extraction technologies for industrial-scale critical materials recovery

Treatment of wastewater from the flocculation process of waste cutting fluid by zerovalent iron catalyst

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