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Journal ArticleDOI

Physico-chemical treatment techniques for wastewater laden with heavy metals

TL;DR: In this article, the technical applicability of various physico-chemical treatments for the removal of heavy metals such as Cd(II), Cr(III, Cr(VI), Cu(II, Ni(II) and Zn(II).
About: This article is published in Chemical Engineering Journal.The article was published on 2006-05-01. It has received 1732 citations till now. The article focuses on the topics: Wastewater & Ion exchange.
Citations
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Journal ArticleDOI
TL;DR: It is evident from the literature survey articles that ion-exchange, adsorption and membrane filtration are the most frequently studied for the treatment of heavy metal wastewater.

6,844 citations


Cites background from "Physico-chemical treatment techniqu..."

  • ...…it is important to mention that the selection of the most suitable treatment techniques depends on the initial metal concentration, the component of the wastewater, capital investment and operational cost, plant flexibility and reliability and environmental impact, etc. (Kurniawan et al., 2006)....

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Journal ArticleDOI
TL;DR: In this article, the authors reviewed the recent developments and technical applicability of various treatments for the removal of heavy metals from industrial wastewater and evaluated their advantages and limitations in application, including adsorption on new adsorbents, membrane filtration, electrodialysis, and photocatalysis.

2,419 citations


Cites background from "Physico-chemical treatment techniqu..."

  • ...However, with reduced chemical costs (such as utilizing of low-cost adsor- bents) and a feasible sludge disposal, physico-chemical treatments have been found as one of the most suitable treatments for inorganic effluent (Kurniawan et al., 2006)....

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  • ...There are different types of membrane filtration such as ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) Kurniawan et al., 2006....

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  • ...A noticeable disadvantage was that corrosion could become a significant limiting factor, where electrodes would frequently have to be replaced (Kurniawan et al., 2006)....

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  • ...Fouling has many adverse effects on the membrane system such as flux decline, an increase in transmembrane pressure (TMP) and the biodegradation of the membrane materials (Kurniawan et al., 2006)....

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Journal ArticleDOI
Ming Hua1, Shujuan Zhang1, Bingcai Pan1, Weiming Zhang1, Lu Lv1, Quanxing Zhang1 
TL;DR: The present review mainly focuses on NMOs' preparation, their physicochemical properties, adsorption characteristics and mechanism, as well as their application in heavy metal removal.

1,828 citations


Cites methods from "Physico-chemical treatment techniqu..."

  • ...Nowadays, numerous methods have been proposed for fficient heavy metal removal from waters, including but not imited to chemical precipitation, ion exchange, adsorption, memrane filtration and electrochemical technologies [5–9]....

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Journal ArticleDOI
TL;DR: The heavy metal adsorption capacities for these modified cellulose materials were found to be significant and levels of uptake were comparable, in many instances, to both other naturally occurring adsorbent materials and commercial ion exchange type resins.

1,127 citations


Cites background or methods from "Physico-chemical treatment techniqu..."

  • ...Paints and pigments Pb, Cr, As, Ti, Ba, Zn Aqueous waste from m deterioration and soil p tion/coagulation, membrane technology, electrolytic reduction, ion exchange and adsorption (Kurniawan et al., 2006; Wang et al., 2003)....

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  • ...Various methods exist for the removal of heavy metal ions from wastewater which include chemical precipita- tion/coagulation, membrane technology, electrolytic reduction, ion exchange and adsorption (Kurniawan et al., 2006; Wang et al., 2003)....

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  • ...Li et al. (2007a) prepared an citric acid modified orange peel cellulose adsorbent for the removal of Cd(II) from aqueous solutions....

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Journal ArticleDOI
TL;DR: This Review considers several aspects of the most prominent sustainable organicsolvents in use today, ionic liquids, deep eutectic solvents, supercritical fluids, switchable solVents, liquid polymers, and renewable solvent, giving a more complete picture of the current status of sustainable solvent research and development.
Abstract: Sustainable solvents are a topic of growing interest in both the research community and the chemical industry due to a growing awareness of the impact of solvents on pollution, energy usage, and contributions to air quality and climate change. Solvent losses represent a major portion of organic pollution, and solvent removal represents a large proportion of process energy consumption. To counter these issues, a range of greener or more sustainable solvents have been proposed and developed over the past three decades. Much of the focus has been on the environmental credentials of the solvent itself, although how a substance is deployed is as important to sustainability as what it is made from. In this Review, we consider several aspects of the most prominent sustainable organic solvents in use today, ionic liquids, deep eutectic solvents, supercritical fluids, switchable solvents, liquid polymers, and renewable solvents. We examine not only the performance of each class of solvent within the context of the...

1,051 citations

References
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Journal ArticleDOI
TL;DR: In this article, the development, design and applications of electrochemical technologies in water and wastewater treatment are reviewed with particular focus on electrodeposition, electrocoagulation, electroflotation (EF), and electrooxidation.

2,577 citations

Journal ArticleDOI
TL;DR: By ion exchange undesirable ions are replaced by others which don't contribute to contamination of the environment by means various modern types of ion exchangers.

1,400 citations

Journal ArticleDOI
TL;DR: It is evident that adsorbents chemically modified with an oxidizing agent demonstrate better Cr(VI) removal capabilities than as-received adsorbent in terms of adsorption rate.

846 citations

Journal ArticleDOI
TL;DR: Low-cost adsorbents can be viable alternatives to activated carbon for the treatment of metals-contaminated wastewater and vary, depending on the characteristics of the individual adsorbent, the extent of surface modification and the initial concentration of the adsorbate.

712 citations

Journal ArticleDOI
TL;DR: It was found that more than 95% removal was achieved under optimal conditions and ion exchange resins investigated showed reversible uptake of chromium and, thus, have good application potential for the removal/recovery of Chromium from aqueous solutions.

641 citations