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Citation: SHI Xiao-Wen, DU Yu-Min, QIN Cai-Qin, XIAO Ling. Preparation of Crosslinked Carboxymethyl Chitosan Microsphere and Its Adsorption for Pb²⁺[J]. Chinese Journal of Applied Chemistry, ;2003, 20(8): 715-718. shu

Preparation of Crosslinked Carboxymethyl Chitosan Microsphere and Its Adsorption for Pb²⁺

1.
Department of Environmental Sciences, Wuhan University, Wuhan 430072

Corresponding author: DU Yu-Min,
Received Date: 29 September 2002
Available Online: 12 May 2003
Fund Project: 国家自然科学基金资助课题(29977014) (29977014)

The chitosan microsphere under protection of amino groups was cross linked with epichlorohydrin to get adsorbent insoluble in acid, which was reacted with chloroacetic acid to give carboxymethyl chitosan resin(CMCS). The FT-IR spectra and adsorption experiment for Pb²⁺ of the product showed that most Pb²⁺ were adsorbed on CMCS in the first 1 h and the pH value of the medium has great influence on the adsorption capacity. The adsorption capacity of CMCS towards Pb²⁺ was 1.12 mmol/g at pH=5, 70% higher than that of chitosan resin.
- carboxymethyl chitosan,
- microsphere,
- adsorption,
- Pb²⁺
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Preparation of Crosslinked Carboxymethyl Chitosan Microsphere and Its Adsorption for Pb²⁺