活性炭負載殼聚糖吸附Hg²⁺的研究

李路華，張文艷，史訓立，賀會蘭，高愛舫

摘要：將脫乙酰度94.2%的殼聚糖溶解于0.5%醋酸溶液中，配制成0.5%的殼聚糖溶液，然后按照殼聚糖與活性炭質量比1∶50使殼聚糖負載在活性炭上， 制成固體復合吸附劑，用于去除污水中汞離子（Hg2+）。試驗表明，水中Hg2+含量100 mg/L、pH 3.7、吸附時間25 min、吸附劑用量為2.5 g/L時，水樣中Hg2+的去除率為99.56%，與只用活性炭吸附相比提高了17.22個百分點。

關鍵詞：活性炭負載殼聚糖；汞離子；吸附

中圖分類號：X52 文獻標識碼：A 文章編號：0439-8114（2013）05-1027-03

Studies on the Adsorption of Hg2+ by Activated Carbon-Chitosan Compound Adsorbent

LI Lu-hua1，ZHANG Wen-yan2，SHI Xun-li1，HE Hui-lan1，GAO Ai-fang1

（1. College of Mathematics and Science， Shijiazhuang University of Economics， Shijiazhuang 050031， China；

2. Law Department， Xingtai Open University， Xingtai 054000， Hebei， China）

Abstract： Chitosan with 94.2% of deacetylation degree was dissolved into 0.5% acetic acid to get 0.5% chitosan-acetic acid solution. Then solid carbon -chitosan compound adsorbent was made with mass ratio of chitosan to carbon at 1∶50 to remove Hg2+ in waste water. The results indicated that when the Hg2+ content in water was 100 mg/L， pH at 3.7， the adsorption time was 25 min and the adsorbent dosage was 2.5 g/L， the removal rate of Hg2+ was 99.56%； which increased by 17.22 percentage point compared with using activated carbon only.

Key words： activated carbon-chitosan； Hg2+； adsorption