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High crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin for heavy metal adsorption: its characteristics and mechanisms

High crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin for heavy metal adsorption: its characteristics and mechanisms
High crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin for heavy metal adsorption: its characteristics and mechanisms
A lower expansive heavy metal adsorbent, high crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide)resin (HCAA), has been prepared by enhancing the crosslinking degree of the traditional water-absorbing polymer under the graftcopolymerization reaction. Further heavy metal adsorption experiments, morphology analysis, and structure characteristic ob-servations indicate that HCAA resin has an excellent heavy metal adsorption properties for Cr3+, Cu2+, Ni2+, and Zn2+of 80.08,158.07, 155.71, and 137.15 mg/g, respectively. The nanoholes in network structures of HCAA resin expanding in solutionprovide an effective diffusion and exchange channels for heavy metal ions and Na+. The adsorption process of HCAA containing –COONa is attributed to ion exchange process, and its essence is to form the coordination bond with heavy metals. Theadsorption capacity differences of –COO−have been explained by using the coordination chemistry theory. In addition, theadsorption selectivity of an expansive adsorbent containing–COONa are heavy metals > H2O >> Na+. Our research puts forwardan insight that increasing the crosslinker content on the basis of the traditional super absorbent resin can obtain a lower expansiveadsorbent to heavy metal pollutants
Carboxylic group, Expansive adsorbent, Heavy metal adsorption, Ion exchange, Mechanism
0944-1344
38617-38630
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Yang, Ping
eead0b00-bbdf-42d9-a2b9-6f69632799fb
Lan, Guihong
fd98a25b-e8f1-4a24-a163-a73f2048b130
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Cai, Qin
0ccb84a1-cc9b-4d1f-a8e8-16cec26ae7ba
Xi, Junnan
4b8bdd06-4728-48e3-8026-739aca66b2c0
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Yang, Ping
eead0b00-bbdf-42d9-a2b9-6f69632799fb
Lan, Guihong
fd98a25b-e8f1-4a24-a163-a73f2048b130
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Cai, Qin
0ccb84a1-cc9b-4d1f-a8e8-16cec26ae7ba
Xi, Junnan
4b8bdd06-4728-48e3-8026-739aca66b2c0

Zhang, Ming, Yang, Ping, Lan, Guihong, Liu, Yongqiang, Cai, Qin and Xi, Junnan (2020) High crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide) resin for heavy metal adsorption: its characteristics and mechanisms. Environmental Science and Pollution Research, 27 (31), 38617-38630. (doi:10.1007/s11356-020-09945-0).

Record type: Article

Abstract

A lower expansive heavy metal adsorbent, high crosslinked sodium carboxyl methylstarch-g-poly (acrylic acid-co-acrylamide)resin (HCAA), has been prepared by enhancing the crosslinking degree of the traditional water-absorbing polymer under the graftcopolymerization reaction. Further heavy metal adsorption experiments, morphology analysis, and structure characteristic ob-servations indicate that HCAA resin has an excellent heavy metal adsorption properties for Cr3+, Cu2+, Ni2+, and Zn2+of 80.08,158.07, 155.71, and 137.15 mg/g, respectively. The nanoholes in network structures of HCAA resin expanding in solutionprovide an effective diffusion and exchange channels for heavy metal ions and Na+. The adsorption process of HCAA containing –COONa is attributed to ion exchange process, and its essence is to form the coordination bond with heavy metals. Theadsorption capacity differences of –COO−have been explained by using the coordination chemistry theory. In addition, theadsorption selectivity of an expansive adsorbent containing–COONa are heavy metals > H2O >> Na+. Our research puts forwardan insight that increasing the crosslinker content on the basis of the traditional super absorbent resin can obtain a lower expansiveadsorbent to heavy metal pollutants

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Zhang2020HiGhCrosslinkedSodiumCarboxylM - Accepted Manuscript
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Accepted/In Press date: 29 June 2020
e-pub ahead of print date: 5 July 2020
Published date: 1 November 2020
Additional Information: Funding Information: The authors would like to thank the financial support by the supporting program of the Science and Technology Department in Sichuan province (2015SZ0009) and China Postdoctoral Science Function (Grant No. 2015M572477). Publisher Copyright: © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
Keywords: Carboxylic group, Expansive adsorbent, Heavy metal adsorption, Ion exchange, Mechanism

Identifiers

Local EPrints ID: 442844
URI: http://eprints.soton.ac.uk/id/eprint/442844
ISSN: 0944-1344
PURE UUID: cc91cebd-3fc7-4df3-85b5-60664c562bf5
ORCID for Yongqiang Liu: ORCID iD orcid.org/0000-0001-9688-1786

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Date deposited: 29 Jul 2020 16:30
Last modified: 17 Mar 2024 05:46

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Contributors

Author: Ming Zhang
Author: Ping Yang
Author: Guihong Lan
Author: Yongqiang Liu ORCID iD
Author: Qin Cai
Author: Junnan Xi

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