%0 Journal Article
%T Study on characterization of mercury sorption by natural and thiol modified zeolites<br>天然和巯基改性沸石吸附水溶液中重金属Hg~(2+)的特征研究
%A Zhang Xinyan
%A Wang Qichao Zhang Shaoqing
%A Sun Xiaojing
%A Zhang Zhongsheng
%A <br>张新艳
%A 王起超
%A 张少庆
%A 孙晓静
%A 张仲胜
%J 环境工程学报
%D 2009
%I 
%X This work, using cysteamine hydrochloride to modify natural clinoptilolite zeolites, results in great enhancement of absorption capacity. The effects of absorber dosage, pH values, temperature, adsorption time and Hg2+ concentration on Hg2+ adsorption and adsorption mechanism are researched. The result shows that the mercury retention by the modified zeolite is attributed to the metal-chelating S functionality, while the one by the natural zeolite is cation exchange. The pH and temperature factors that have slightly effect on the modified zeolite adsorption could significantly affect the natural zeolite; the higher the temperature is, the lower the sorption rate is. Within a high rate of the adsorption process, the modified zeolite takes 0.5 h to reach the adsorption equilibrium, while the natural zeolite takes 1 h. The Langmuir isotherm model and the adsorption conditions experiment both indicate that the modification has greatly enhanced the adsorption capacity for Hg2+, the maximum capacity is increased by 146.65%, from 8.06 mg/g to 19.88 mg/g Hg.
%K Hg2<br>巯基
%K 改性沸石
%K 天然沸石
%K 吸附条件
%K 吸附机理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=74E1A626B8C4A723A093680F5B0149C3&yid=DE12191FBD62783C&vid=38B194292C032A66&iid=38B194292C032A66&sid=366B1248A15658C5&eid=E0172F1A638CE984&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=2&reference_num=16