| 水溶性巯基壳聚糖对污染土壤吸附态汞的解吸作用研究 |
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| 引用本文： | 张伟安,汪玉庭,杨智宽,刘良栋,周连凤,吴小刚,丁惠君.水溶性巯基壳聚糖对污染土壤吸附态汞的解吸作用研究[J].环境污染与防治,2007,29(6):411-414. |
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| 作者姓名： | 张伟安 汪玉庭 杨智宽 刘良栋 周连凤 吴小刚 丁惠君 |
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| 作者单位： | 1. 武汉大学资源与环境科学学院,湖北,武汉,430079;江西省环境保护科学研究院,江西,南昌,330029
2. 武汉大学资源与环境科学学院,湖北,武汉,430079 |
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| 摘 要： | 用两种巯基化试剂半胱氨酸(Cys)和硫代乙醇酸(Thi)与壳聚糖(CTS)反应,制备了两种水溶性巯基壳聚糖,即Cys-CTS和Thi-CTS,对比研究了这两种巯基壳聚糖与CTS对被染毒土壤中吸附态汞的提取能力.结果表明,Thi-CTS在pH=3、质量浓度为0.5g/L、用量为20 mL的条件下.对汞的提取率为59.44%,相同条件下CTS和cys-CTS对汞的最高提取率只有31.81%和10.15%.
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| 关 键 词： | 汞 土壤 巯基壳聚糖 整合 解吸 |
Sulfhydryl chitosan for enhanced extraction of mercury from contaminated soil |
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| Zhang Weian,Wang Yuting,Yang Zhikuan,Liu Liangdong,Zhou Lianfeng,Wu Xiaogang,Ding Huijun.Sulfhydryl chitosan for enhanced extraction of mercury from contaminated soil[J].Environmental Pollution & Control,2007,29(6):411-414. |
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| Authors: | Zhang Weian Wang Yuting Yang Zhikuan Liu Liangdong Zhou Lianfeng Wu Xiaogang Ding Huijun |
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| Institution: | 1. College of Resources and Environmental Science ,Wuhan University ,Wuhan Hubei 430079 ;2. Jiangxi Academy of Environmental Sciences, Nanchang Jiangxi 330029 |
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| Abstract: | Cys-CTS and Thi-CTS were prepared by reaction of sulfhydryl reagents cysteine and thioglycollic acid with chitosan(CTS).The effectiveness of chelating additives CTS,Cys-CTS and Thi-CTS in removing Hg2 from the artificially contaminated soil was studied.All three additives enhanced the Hg extraction efficiency of 1% acetic acid;Thi-CTS was the most effective,followed by CTS.The extraction efficiency increased with the additive dose,and it declined as pH was raised above 3.At a pH of 3,by 20 mL of 1% acetic acid solution containing 0.5 g/L of Thi-CTS,CTS and Cys-CTS removed 59.44%,31.81% and 10.15% of Hg2 from the 1 g soil sample,respectively. |
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| Keywords: | Mercury Soil Sulfhydryl chitosan Chelating additive Desorption |
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