An environment friendly approach for heavy metal removal from industrial wastewater using chitosan based biosorbent: A review

Sheth, Yashvi; Dharaskar, Swapnil; Khalid, Mohammad; Sonawane, Shriram S.

doi:10.1016/j.seta.2020.100951

Cited by 88 publications

(52 citation statements)

References 156 publications

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“…There are not many research papers that use multiple types of adsorbents in a single frame to eliminate them. The classification of various types of adsorbent like natural, synthetic and modified adsorbents have been covered in this review which otherwise was not included in any of the reviews published before [ 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

A Review of Adsorbents for Heavy Metal Decontamination: Growing Approach to Wastewater Treatment

Gupta¹,

Sharma

Sharma³

et al. 2021

Materials

140

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Heavy metal is released from many industries into water. Before the industrial wastewater is discharged, the contamination level should be reduced to meet the recommended level as prescribed by the local laws of a country. They may be poisonous or cancerous in origin. Their presence does not only damage people, but also animals and vegetation because of their mobility, toxicity, and non-biodegradability into aquatic ecosystems. The review comprehensively discusses the progress made by various adsorbents such as natural materials, synthetic, agricultural, biopolymers, and commercial for extraction of the metal ions such as Ni2+, Cu2+, Pb2+, Cd2+, As2+ and Zn2+ along with their adsorption mechanisms. The adsorption isotherm indicates the relation between the amount adsorbed by the adsorbent and the concentration. The Freundlich isotherm explains the effective physical adsorption of the solute particle from the solution on the adsorbent and Langmuir isotherm gives an idea about the effect of various factors on the adsorption process. The adsorption kinetics data provide valuable insights into the reaction pathways, the mechanism of the sorption reaction, and solute uptake. The pseudo-first-order and pseudo-second-order models were applied to describe the sorption kinetics. The presented information can be used for the development of bio-based water treatment strategies.

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Section: Introductionmentioning

confidence: 99%

A Review of Adsorbents for Heavy Metal Decontamination: Growing Approach to Wastewater Treatment

Gupta¹,

Sharma

Sharma³

et al. 2021

Materials

140

View full text Add to dashboard Cite

show abstract

“…They are mainly extracted from marine resources (shrimp shell and algal biomass, respectively). These biopolymers are very versatile both physically (elaborating different shaping and conditionings) and chemically (reactivity of functional groups for chemical reaction and grafting of specific reactive groups) [19][20][21][22][23][24]. Chitosan is characterized by the presence of hydroxyl groups (providing hydrophilic behavior) and amine groups, which are highly reactive for metal binding.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

et al. 2021

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The necessity of decontaminating effluents for the dual purpose of environmental beneficiation and valorization of low-grade resources is driving the development of new sorbents. The functionalization of biopolymers is a promising strategy for improving sorption performance. Incorporating magnetic micro-particles offers an opportunity for the facilitated recovery of spent micron-size sorbent. Combining magnetic facilities and biopolymer functionalization represents a winning strategy. Magnetic glycine-grafted chitosan (G@MChs) was synthesized for the sorption of Ni(II), Zn(II), and Hg(II) before being applied to the removal of hazardous and strategic metals from tailing leachates. The sorbent was characterized using Fourier transform infrared spectroscopy and scanning electron microscopy, before and after metal sorption. The acid–base properties of functionalized sorbent were also determined (pHPZC). Uptake kinetics were studied in mono- and multi-component solutions using different equations for kinetic modeling at optimized pH (i.e., pH0: 5.5). Langmuir and Sips equations were applied to model sorption isotherms in single-component solutions. In addition, sorption isotherms in multi-component solutions were used to evaluate the preference for selected metals. Maximum sorption capacities were 0.35 mmol Hg g−1, 0.47 mmol Zn g−1, and 0.50 mmol Ni g−1. Acidified urea solution (pH 2.7) successfully desorbs metal ions from G@MChs (desorption > 90%). The sorbent was tested for the recovery of hazardous and strategic metal ions from acidic leachates of tailings. This study demonstrates the promising performance of G@MChs for the treatment of complex metal-bearing solutions.

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“…Thus far, different kinds of aerogels have been proposed for air and water treatments; however, those based on cellulose, chitosan, graphene oxide, and silica are among the most commonly employed [ 17 , 19 , 30 , 31 , 32 ]. Generally speaking, over the years, aerogels’ evolution began with the appearance of silica aerogels in the 1970s, followed by carbon-based aerogels; then, the novel aerogels of the 2010s were proposed, such as those based on graphene [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

2021

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Aerogels are open, three-dimensional, porous materials characterized by outstanding properties, such as low density, high porosity, and high surface area. They have been used in various fields as adsorbents, catalysts, materials for thermal insulation, or matrices for drug delivery. Aerogels have been successfully used for environmental applications to eliminate toxic and harmful substances—such as metal ions or organic dyes—contained in wastewater, and pollutants—including aromatic or oxygenated volatile organic compounds (VOCs)—contained in the air. This updated review on the use of different aerogels—for instance, graphene oxide-, cellulose-, chitosan-, and silica-based aerogels—provides information on their various applications in removing pollutants, the results obtained, and potential future developments.

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An environment friendly approach for heavy metal removal from industrial wastewater using chitosan based biosorbent: A review

Cited by 88 publications

References 156 publications

A Review of Adsorbents for Heavy Metal Decontamination: Growing Approach to Wastewater Treatment

A Review of Adsorbents for Heavy Metal Decontamination: Growing Approach to Wastewater Treatment

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

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