Electroplating for chromium removal from tannery wastewater

Silva, G. S. da; Santos, Fernando; Roth, Gustavo; Frankenberg, Claudio Luis Crescente

doi:10.1007/s13762-019-02494-1

Cited by 22 publications

(6 citation statements)

References 25 publications

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“…The mass ratio of monomer is 5:1, the amount of initiator is 1.2%, and the absorption rate of ionized water is 2216 g g −1 wastewater. [112][113][114][115][116][117][118][119][120][121][122] The ordinate is the content of each component based on Log10; all units are expressed in mg L −1 with the exception of pH.…”

Section: Cross-linked Oxidized Starchmentioning

confidence: 99%

Current Advances in Design of Starch‐Based Superabsorbent Polymers and Their Removal of Typical Pollutants from Tannery Wastewater

et al. 2023

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With the vigorous development of leather industry, the environmental pollution problem originated from tannery wastewater is becoming increasingly serious, which could be solved by using the advanced adsorption technology. As a biodegradable natural biomaterial, starch displays a wide range of sources and has gradually become one of the best choices for preparing superabsorbent polymers. The excellent characteristics of starch‐based superabsorbent polymer make it widely applied in wastewater treatment. Therefore, this paper reviewed the research progress of starch‐based superabsorbent polymer in recent years by removing metal ions and typical organic compounds from tannery wastewater. Firstly, the synthesis methods and characteristics of starch‐based superabsorbent polymers were discussed. Secondly, the main factors influencing the adsorption performance of starch‐based superabsorbent polymer have been introduced. Thirdly, the present situation of treating tannery wastewater with starch‐based superabsorbent polymer was summarized. Finally, some problems existing in the practical application of starch‐based superabsorbent polymer were proposed. Although starch‐based superabsorbent polymer showed excellent adsorption properties, there remained several issues such as recycling needed to be addressed. This review would benefit for the high‐value utilizations of starch‐based superabsorbent polymers in reducing the environmental pollution caused by tannery wastewater.This article is protected by copyright. All rights reserved

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Section: Cross-linked Oxidized Starchmentioning

confidence: 99%

Current Advances in Design of Starch‐Based Superabsorbent Polymers and Their Removal of Typical Pollutants from Tannery Wastewater

et al. 2023

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“…Sheet electrodes of steel, copper, and lead materials were investigated in one study for Cr cathode deposition, 99% recover of total chromium was achieved within 2 h mainly in the form of Cr(OH) 3 from TWW sample [143]. A cost-effective electrochemical system employed with graphite and aluminum as anode and cathode was observed with 96.5% removal efficacy of total chromium in one real TWW treatment experiment [144]. Since segregation and recovery of chromium always has a priority in case of TWW treatment, combination of anode oxidation and cathode reduction may provide a new direction for simultaneous removal of recalcitrant organic pollutants and Cr (III).…”

Section: Electrochemical Reduction and Microbial Fuel Cellsmentioning

confidence: 99%

Tannery wastewater treatment: conventional and promising processes, an updated 20-year review

Jun

Tang

et al. 2022

J Leather Sci Eng

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Mismanagement of various wastes especially waste water produced by tanning processes has caused serious environmental problems and ultimately impaired human health. Constant efforts have been making to alleviate the pollution of tannery wastewater (TWW), yet terminal treatment still takes dominance. In this review, research on TWW treatment from 2000 to 2021 was summarized, and main methods such as coagulation and flocculation, adsorption, biological treatment, membrane filtration, advanced oxidation process were briefly discussed. More detailed introduction was given to the method of electrochemical treatment since it has excellent performance such as environmental friendliness and high efficiency, hence attracting more and more research attention in recent years. In view of the harsh physi-chemical conditions of TWW, integrated or combined treatment methods are accordingly recommended with better performance and multi-function, however comprehensive studies on optimization of methods combination and cost-effectiveness are needed. The certain issues that the residue Cr in treatment sludge and high salinity in effluent still remain were put forward in this work and potential solutions were provided. Moreover, this review proposed the perspective that realizing multi-function, recycling, and intensification should be the developing direction for future TWW treatment. This review is expected to provide a general guide for researchers who aspire to ameliorate TWW pollution problems and understand various methods utilized in this field. Graphical abstract

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“…These electrolytes can be a real alternative; however, the electrochemical reactions that take place in the electrodeposition of chromium from Cr(III) salt solutions are complicated and their understanding still needs to be studied. In an electrodeposition process using electroplating, the removal of chromium ions from tannery wastewater was evaluated in a synthetic trivalent chromium solution; 96.5% of the total chromium content was removed in the untreated effluent [ 88 ]. Finally the route dictated by the thermodynamics of the multistep reduction of Cr(III) to Cr evidences that metallic chromium is probably deposited through the discharge of electroactive hydroxo complexes of bivalent chromium that form in the near-cathode layer due to the dissociation of water molecules [ 89 , 90 ], but it is still necessary to evaluate this process more extensively in tannery wastewater.…”

Section: Technologies For the Treatment Of Tannery Wastewatermentioning

confidence: 99%

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

2021

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The tannery industry is one of the economic sectors that contributes to the development of different countries. Globally, Europe and Asia are the main producers of this industry, although Latin America and Africa have been growing considerably in recent years. With this growth, the negative environmental impacts towards different ecosystem resources as a result of the discharges of recalcitrated pollutants, have led to different investigations to generate alternative solutions. Worldwide, different technologies have been studied to address this problem, biological and physicochemical processes have been widely studied, presenting drawbacks with some recalcitrant compounds. This review provides a context on the different existing technologies for the treatment of tannery wastewater, analyzing the physicochemical composition of this liquid waste, the impact it generates on human health and ecosystems and the advances in the different existing technologies, focusing on advanced oxidation processes and the use of microalgae. The coupling of advanced oxidation processes with biological processes, mainly microalgae, is seen as a viable biotechnological strategy, not only for the removal of pollutants, but also to obtain value-added products with potential use in the biorefining of the biomass.

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Electroplating for chromium removal from tannery wastewater

Cited by 22 publications

References 25 publications

Current Advances in Design of Starch‐Based Superabsorbent Polymers and Their Removal of Typical Pollutants from Tannery Wastewater

Current Advances in Design of Starch‐Based Superabsorbent Polymers and Their Removal of Typical Pollutants from Tannery Wastewater

Tannery wastewater treatment: conventional and promising processes, an updated 20-year review

Advanced Oxidation Processes and Biotechnological Alternatives for the Treatment of Tannery Wastewater

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