%0 Journal Article
%T 活性炭对卷烟烟气中汞和铅的吸附
%A 杨继亮
%A 岳贤田
%A 周建斌
%J 林业工程学报
%D 2016
%R 10.13360/j.issn.2096-1359.2016.01.013
%X 为探究活性炭孔隙结构及表面化学性质对卷烟主流烟气中重金属元素汞和铅吸附作用的影响,分别以H3PO4及H3PO4复合KH2PO4活化法制备的两种杏壳活性炭作为卷烟滤嘴的吸附剂材料,研究了活性炭不同的孔隙结构及表面含氧官能团含量在吸附中的作用。结果表明:活性炭的孔隙结构是影响重金属元素吸附性能的重要因素之一,活性炭中孔径范围在0.852～1.096 nm的孔隙有利于卷烟主流烟气中重金属元素汞的吸附,孔径范围在1.245～1.534 nm的孔隙有利于卷烟主流烟气中重金属元素铅的吸附; 比表面积与汞、铅元素的吸附无明显相关性; 提高活性炭表面含氧酸性官能团含量有利于卷烟烟气中汞和铅的吸附; 汞和铅在活性炭表面的吸附位一致,存在竞争吸附现象。</br>In order to investigate the effects of pore structure and surface chemical properties of activated carbon on absorption of Hg and Pb in cigarette mainstream smoke, activated carbons were prepared from almond shells by chemical activation with H3PO4 or H3PO4-KH2PO4 composite. The samples were characterized by Boehm titration and N2 adsorption-desorption to study their surface chemical properties and pore structure. Then the activated carbons were used as adsorbents in the cigarette filters to reduce the contents of Hg and Pb in mainstream cigarette smoke. The role of pore structure and content of surface oxygen-containing functional group on absorption were explored. It was found that the pore structure of the activated carbon was one of the key factors affecting the heavy metal adsorption properties. The pores with the size of 0.852-1.096 nm were conducive to the adsorption of Hg in cigarette mainstream smoke, while the pores with the size of 1.245-1.534 nm were conducive to the adsorption of Pb. There was no obvious relationship between the surface area and Hg/Pb adsorption amount. The surface acidic oxygen-containing functional groups on activated carbon played an important role in the adsorption process. The adsorption of Hg and Pb in cigarette mainstream smoke can be improved by increasing the content of carboxyl groups on the surface of the activated carbon. Competitive adsorption phenomenon existed between Hg and Pb for the same active sites
%K 活性炭
%K 理化性质
%K 主流烟气
%K 重金属
%K 吸附&lt
%K /br&gt
%K activated carbon
%K physicochemical property
%K mainstream smoke
%K heavy metal
%K adsorption
%U http://lkkf.njfu.edu.cn//oa/darticle.aspx?type=view&id=201601013