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Rapid removal of Pb(II) from aqueous solution by chitosan-g-poly(acrylic acid)/attapulgite/ sodium humate composite hydrogels.
Environ Technol. 2011 Apr; 32(5-6):523-31.ET

Abstract

A series of novel granular chitosan-g-poly(acrylic acid)/attapulgite/sodium humate (CTS-g-PAA/APT/SH) composite hydrogels were successfully prepared by one-step free radical graft polymerization and applied as adsorbents for the removal of Pb(II) from aqueous solution. The effects of adsorbent composition (including the contents of APT, SH and CTS) on adsorption capacity and adsorption rate were investigated in detail. Results from kinetic experiments showed that the rate of Pb(II) adsorption on the composite hydrogels was quite fast, that more than 90% of the equilibrium adsorption capacity occurs within two minutes and that the adsorption equilibrium could be achieved within 10 minutes. The adsorption kinetics fit well with the pseudo-second order equation. The introduced SH is helpful for both adsorption capacity and adsorption rate. The -COOH and -COO of PAA, -NH2 of CTS, Ph-O and -COO- of SH, as well as cation exchange and Si-OH of APT, participate in adsorption of Pb(II). The synergistic effect of these groups is responsible for the high adsorption capacity and rate.

Authors+Show Affiliations

Key Laboratory for Attapulgite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huaian, People's Republic of China.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21877533

Citation

Zhang, Junping, et al. "Rapid Removal of Pb(II) From Aqueous Solution By Chitosan-g-poly(acrylic Acid)/attapulgite/ Sodium Humate Composite Hydrogels." Environmental Technology, vol. 32, no. 5-6, 2011, pp. 523-31.
Zhang J, Jin Y, Wang A. Rapid removal of Pb(II) from aqueous solution by chitosan-g-poly(acrylic acid)/attapulgite/ sodium humate composite hydrogels. Environ Technol. 2011;32(5-6):523-31.
Zhang, J., Jin, Y., & Wang, A. (2011). Rapid removal of Pb(II) from aqueous solution by chitosan-g-poly(acrylic acid)/attapulgite/ sodium humate composite hydrogels. Environmental Technology, 32(5-6), 523-31.
Zhang J, Jin Y, Wang A. Rapid Removal of Pb(II) From Aqueous Solution By Chitosan-g-poly(acrylic Acid)/attapulgite/ Sodium Humate Composite Hydrogels. Environ Technol. 2011;32(5-6):523-31. PubMed PMID: 21877533.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rapid removal of Pb(II) from aqueous solution by chitosan-g-poly(acrylic acid)/attapulgite/ sodium humate composite hydrogels. AU - Zhang,Junping, AU - Jin,Yeling, AU - Wang,Aiqin, PY - 2011/9/1/entrez PY - 2011/9/1/pubmed PY - 2011/10/6/medline SP - 523 EP - 31 JF - Environmental technology JO - Environ Technol VL - 32 IS - 5-6 N2 - A series of novel granular chitosan-g-poly(acrylic acid)/attapulgite/sodium humate (CTS-g-PAA/APT/SH) composite hydrogels were successfully prepared by one-step free radical graft polymerization and applied as adsorbents for the removal of Pb(II) from aqueous solution. The effects of adsorbent composition (including the contents of APT, SH and CTS) on adsorption capacity and adsorption rate were investigated in detail. Results from kinetic experiments showed that the rate of Pb(II) adsorption on the composite hydrogels was quite fast, that more than 90% of the equilibrium adsorption capacity occurs within two minutes and that the adsorption equilibrium could be achieved within 10 minutes. The adsorption kinetics fit well with the pseudo-second order equation. The introduced SH is helpful for both adsorption capacity and adsorption rate. The -COOH and -COO of PAA, -NH2 of CTS, Ph-O and -COO- of SH, as well as cation exchange and Si-OH of APT, participate in adsorption of Pb(II). The synergistic effect of these groups is responsible for the high adsorption capacity and rate. SN - 0959-3330 UR - https://www.unboundmedicine.com/medline/citation/21877533/Rapid_removal_of_Pb_II__from_aqueous_solution_by_chitosan_g_poly_acrylic_acid_/attapulgite/_sodium_humate_composite_hydrogels_ L2 - http://www.tandfonline.com/doi/full/10.1080/09593330.2010.504748 DB - PRIME DP - Unbound Medicine ER -