Synthesis of crosslinked starch-graft-polyacrylamide-co-sodium xanthate and its performances in wastewater treatment

Chang, Qing; Hao, Xuekui; Duan, Lili

doi:10.1016/j.jhazmat.2008.02.053

Cited by 122 publications

(59 citation statements)

References 12 publications

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“…Recently, [67] prepared a novel cross-linked starch-graftpolyacrylamide-co-sodium xanthate (CSAX) by grafting copolymerization reaction of corn starch, acrylamide (AM), and sodium xanthate using epichlorohydrin (EPI) as cross-linking reagent [a] Proposed structure of the metal chelate with CMS carboxymethylate starch.…”

Section: Maleate Starch Semi-ester Maleate Starch Di-estermentioning

confidence: 99%

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Ms¹,

Arm²

2016

J Pollut Eff Cont

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The recent researches are moving to removal of the agricultural and industrial pollutants from sewage treatment and discuss the possibility of the re-use of this water for agricultural purposes. The chemical contaminants represent the most dangerous types of contaminants found in the water for a many reasons, they are non-biodegradable environmentally and their high toxicity at very low concentrations in addition to the cumulative impact in the bodies of living organisms. The most toxic heavy metals are lead, mercury and chromium. It was estimated that the estimated that global impact of lead is 18-22 million people and of mercury 15 to 19 million people at 2010 according to Blacksmith Institute's World worst pollution problems. Contamination of the water resources with these elements, leads to polluting of the entire food chain and represents a real threat to the ecosystem. Thus, pure water shortage becomes a crucial problem worldwide. Among the most important research that can contribute to solving the problem of those related to water purification and improving the quality and re-use even in agriculture, for example, instead of wasted and discarded. There are many scientific methods applied in this regard. They include adsorption, precipitation, ion exchange, reverse osmosis, electrochemical treatments, membrane filtration, evaporation, flotation, and oxidation and biosorption processes. Some of these techniques however, have disadvantages such as incomplete metal removal, high reagent and energy requirements and generation of toxic sludge or other waste products. Among all these techniques, the adsorption is economically favorable and technically easy to separate. Instead of using commercial materials researchers have worked on inexpensive materials such as natural and agricultural products. Several works concerned the removal of heavy metals but the present work focuses on the sorbents based on biomass and their efficiency in removal of heavy metals from waste water.

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Section: Maleate Starch Semi-ester Maleate Starch Di-estermentioning

confidence: 99%

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Ms¹,

Arm²

2016

J Pollut Eff Cont

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“…CSA was observed to have significantly lower Cu 2+ removal rate compared to 62 and CSX; whereas CSX showed only slightly lower Cu 2+ removal rate with respect to 62. 91 The studies also concluded that the presence of high solution turbidity and Cu 2+ ions in the simulated wastewater complemented each other. The xanthate functional group on the flocculant underwent complexation with Cu 2+ ions to form precipitates, which were observed to be entrained by large flocs as they settled down and vice versa for fine suspended solid particles.…”

Section: Anionically-modified Polysaccharidesmentioning

confidence: 88%

“…The xanthate functional group on the flocculant underwent complexation with Cu 2+ ions to form precipitates, which were observed to be entrained by large flocs as they settled down and vice versa for fine suspended solid particles. 91,92 In addition, Cu 2+ ions also neutralized the negative charges on the suspended solids, which decreased the repulsion between the particles and the polymeric chains, hence enhanced the flocculation efficiency. 91 Mishra et al reported another modified polysaccharide 63, this time, focused on polyacrylic acid grafted onto carboxymethyl cellulose by MWI synthesis.…”

Section: Anionically-modified Polysaccharidesmentioning

confidence: 99%

Synthesis, properties and performance of organic polymers employed in flocculation applications

2016

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A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. Flocculation is a common technique that is widely used in many industrial applications to promote solid-liquid separation processes. The addition of a polymeric flocculant allows for destabilization of suspended colloidal particles, and thus significantly increases their sedimentation rate. Polymeric flocculants are generally divided into four categories, which include non-ionic, cationic, anionic, and amphoteric polymers. This minireview article summarises important information on the recent design and synthesis of polymeric materials from these four categories. In addition, their properties and flocculation efficiency are also presented and discussed.

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“…In addtion to the CSAX has the length of PAM pendant chains that remove turbidity by bridging flocculation. So it is possible that the CSAX use as flocculant to reduce the subsequent units in wastewater treatment [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Characteristic of Macromolecule Heavy Metal Flocculant and Trapping CSAX of Hg²+ from Aqueous Solutions

Li¹,

Hao²,

Chang³

2017

Proceedings of the 3rd 2017 International Conference on Sustainable Development (ICSD 2017)

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Abstract. In this paper, the flocculant and trapping performance of the crosslinked starch-graft-polyacrylamide-co-sodium xanthate (CSAX) was evaluated using wastewater that contains Hg 2+ as the target. Some factors affect the removal rate of Hg 2+ were investigated. The experimental results show that the CSAX was successfully synthesized and it has functions of removing both turbidity and Hg 2+ from aqueous solution. With the increase of pH value and CSAX dosage, the removal rate of Hg 2+ is increased gradudlly. If the presences of alkali metal and alkaline-earth metal ions in wastewater, the removal rate of Hg 2+ is improved too. Then the presences of SO 4 2-and EDTA in wastewater inhibit the removal rate of Hg 2+. Meanwhile when Hg 2+ and turbidity coexist in the wastewater, the removal rate of Hg 2+ can be promoted.

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Synthesis of crosslinked starch-graft-polyacrylamide-co-sodium xanthate and its performances in wastewater treatment

Cited by 122 publications

References 12 publications

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Synthesis, properties and performance of organic polymers employed in flocculation applications

The Characteristic of Macromolecule Heavy Metal Flocculant and Trapping CSAX of Hg²+ from Aqueous Solutions

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