Adsorptive nanocomposite membranes for heavy metal remediation: Recent progresses and challenges

Nasir, Atikah Mohd; Goh, Pei Sean; Abdullah, Mohd Sohaimi; Ng, Be Cheer; Ismail, Ahmad Fauzi

doi:10.1016/j.chemosphere.2019.05.174

Cited by 145 publications

(47 citation statements)

References 111 publications

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“…Nanoadsorbents/nanocomposites: The applicability of adsorbents that are carbon-based or metal oxide and metal organic frameworks (MOFs), zeolites in the nano-range has been increased in the recent years due to their large surface area and high surface chemistry (Nasir et al, 2019). Zanin et al (2016) assessed the role of natural clinoptilolite zeolite (CL) as adsorbent in the for Fe, Cu and Cr respectively.…”

Section: Microbial Bioadsorbentsmentioning

confidence: 99%

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Rastogi¹,

Kumar²

2020

Environmental Degradation: Causes and Remediation Strategies

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Heavy metal pollution in the ecosystem has attracted worldwide attention due to the persistent non-biodegradable toxic nature that affects not only human beings but also animals and vegetation. Instead of using available conventional techniques, the focus has been shifted to utilize eco-friendly, cost-effective, integrated remediation approaches that are simple, non-conventional with design flexibility and does not harm the prevailing surroundings. The main approaches utilized for remediation of heavy metal contaminated soils are sand capping or land filling, phytoremediation, bioremediation, washing, electro-chemical remediation, stabilization, soil replacement, phytoextraction, phytovoltalization, etc., but again they have their own merits and demerits. Many treatment technologies are employed at industrial scale for HM removal from wastewater effluents such as chemical precipitation, flocculation, coagulation, solvent extraction, adsorption, complexation, electro-kinetics, membrane filtration, etc. Therefore, the present chapter critically highlights the role of non-conventional adsorbents and bacterial surfactants as the best alternative technique for heavy metal remediation from contaminated soil and water systems.

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Section: Microbial Bioadsorbentsmentioning

confidence: 99%

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Rastogi¹,

Kumar²

2020

Environmental Degradation: Causes and Remediation Strategies

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“…To date, various physical, chemical, and biological technologies have been developed for the removal of heavy metals from wastewater and soil, such as chemical precipitation, ion exchange, membrane filtration, biosorption, bioremediation, etc. [25,28,51]. However, there are some technical or economic constraints that always restrict the application of these techniques, including high energy input, excessive chemicals consumption, and substantial toxic waste sludge [35,52,53].…”

Section: Mfcs Performances On Heavy Metal Removal In Wastewatermentioning

confidence: 99%

“…The World Health Organization (WHO) set the guideline value of heavy metals for drinking water, for instance, 2 mg/L Cu, 0.05 mg/L Cr, 0.003 mg/L Cd, 0.01 mg/L Pb, 0.006 mg/L Hg, and 0.01 mg/L As [27]. However, the maximum contaminant levels for these heavy metal are often far exceeded in many water sources because of various wastewater sources [28]. According to the official data, although the overall level of heavy metal emissions in China tended to decrease over the past ten years, the emission of heavy metals from wastewater remains huge.…”

Section: Introductionmentioning

confidence: 99%

The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

Fang

Achal

2019

Microorganisms

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The global energy crisis and heavy metal pollution are the common problems of the world. It is noted that the microbial fuel cell (MFC) has been developed as a promising technique for sustainable energy production and simultaneously coupled with the remediation of heavy metals from water and soil. This paper reviewed the performances of MFCs for heavy metal removal from soil and water. Electrochemical and microbial biocatalytic reactions synergistically resulted in power generation and the high removal efficiencies of several heavy metals in wastewater, such as copper, hexavalent chromium, mercury, silver, thallium. The coupling system of MFCs and microbial electrolysis cells (MECs) successfully reduced cadmium and lead without external energy input. Moreover, the effects of pH and electrode materials on the MFCs in water were discussed. In addition, the remediation of heavy metal-contaminated soil by MFCs were summarized, noting that plant-MFC performed very well in the heavy metal removal. Microorganisms 2019, 7, 697 2 of 13 electrode reaction using acetate as a substrate [6] and a two-chamber MFC setup (Figure 1) are shown below: Anodic reaction : CH 3 COO − +2H 2 O microbes → 2CO 2 +7H + +8e − (1) Cathodic reaction : O 2 +4e − +4H + → 2H 2 O. (2)

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“…These concentrations are low, and thus, further treatment in order to comply with legislation is a difficult task. Conventional techniques such as chemical precipitation, coagulation and flocculation etc., are not efficient and are not able to remove low concentrations of target pollutants to permissible levels [2,9]. Techniques such as membrane filtration and ion exchange work well at low concentrations and achieve high efficacies, but suffer from disadvantages such as high operational cost and operational problems, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption can be an economically sustainable and viable solution for the removal of heavy metals from aqueous solutions. Adsorption has many advantages, such as simple operation, low cost, good Ph tolerance, and large industrial processing capacity [2,9,11,12]. However, there is still a need to develop and study new adsorbents, as many of the commonly applied adsorbent materials (activated carbons, zeolites, clay minerals, solid by-products of industrial processes and biosorbents) do not show satisfactory performance for the removal of heavy metals present in low concentrations [10].…”

Section: Introductionmentioning

confidence: 99%

Comparing the Adsorption Performance of Multiwalled Carbon Nanotubes Oxidized by Varying Degrees for Removal of Low Levels of Copper, Nickel and Chromium(VI) from Aqueous Solutions

Šolić

Maletić

Isakovski

et al. 2020

Water

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Functionalized multiwalled carbon nanotubes (MWCNTs) have drawn wide attention in recent years as novel materials for the removal of heavy metals from the aquatic media. This paper investigates the effect that the functionalization (oxidation) process duration time (3 h or 6 h) has on the ability of MWCNTs to treat water contaminated with low levels of Cu(II), Ni(II) and Cr(VI) (initial concentrations 0.5–5 mg L−1) and elucidates the adsorption mechanisms involved. Adsorbent characterization showed that the molar ratio of C and O in these materials was slightly lower for the oxMWCNT6h, due to the higher degree of oxidation, but the specific surface areas and mesopore volumes of these materials were very similar, suggesting that prolonging the functionalization duration had an insignificant effect on the physical characteristics of oxidized multiwalled carbon nanotubes (oxMWCNTs). Increasing the Ph of the solutions from Ph 2 to Ph 8 had a large positive impact on the removal of Cu(II) and Ni(II) by oxMWCNT, but reduced the adsorption of Cr(VI). However, the ionic strength of the solutions had far less pronounced effects. Coupled with the results of fitting the kinetics data to the Elowich and Weber–Morris models, we conclude that adsorption of Cu(II) and Ni(II) is largely driven by electrostatic interactions and surface complexation at the interface of the adsorbate/adsorbent system, whereas the slower adsorption of Cr(VI) on the oxMWCNTs investigated is controlled by an additional chemisorption step where Cr(VI) is reduced to Cr(III). Both oxMWCNT3h and oxMWCNT6h have high adsorption affinities for the heavy metals investigated, with adsorption capacities (expressed by the Freundlich coefficient KF) ranging from 1.24 to 13.2 (mg g−1)/(mg l−1)n, highlighting the great potential such adsorbents have in the removal of heavy metals from aqueous solutions.

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Adsorptive nanocomposite membranes for heavy metal remediation: Recent progresses and challenges

Cited by 145 publications

References 111 publications

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

Comparing the Adsorption Performance of Multiwalled Carbon Nanotubes Oxidized by Varying Degrees for Removal of Low Levels of Copper, Nickel and Chromium(VI) from Aqueous Solutions

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