%0 Journal Article
%T Effect of pH on transport of Pb2+, Mn2+, Zn2+ and Ni2+ through lateritic soil: Column experiments and transport modeling<br>Effect of pH on transport of Pb（2＋）,Mn（2＋）,Zn（2＋）and Ni（2＋） through lateritic soil： Column experiments and transport modeling
%A Srilert Chotpantarat
%A Say Kee Ong
%A Chakkaphan Sutthirat
%A Khemarath Osathaphan
%A <br>Srilert Chotpantarat
%A Say Kee Ong
%A Chakkaphan Sutthirat
%A Khemarath Osathaphan
%J 环境科学学报(英文版)
%D 2011
%I 
%X This study investigated the effects of pH on the transport of Pb2+, Mn2+, Zn2+ and Ni2+ through lateritic soil columns. Model results by fitting the symmetric breakthrough curves (BTCs) of bromide (Br-) with CXTFIT model suggested that physical non-equilibrium processes were absent in the columns. The heavy metal BTCs were, however, asymmetrical and exhibited a tailing phenomenon,indicating the presence of chemical non-equilibrium processes in the columns. The retardation factors of Pb2+ were the largest of the four metal ions at both pH 4.0 (33.3) and pH 5.0 (35.4). The use of Langmuir isotherm parameters from batch studies with HYDRUS-1D did not predict the BTCs well. Rather the two-site model (TSM) described the heavy metal BTCs better than the equilibrium linear/nonlinear Langmuir model. The fraction of instantaneous sorption sites (f) of all four metal ions on the lateritic soil was consistently about 30%-44% of the total sorption sites.
%K pH e ect
%K heavy metals
%K HYDRUS-1D
%K two-site model
%K lateritic soil<br>pH值
%K Langmuir模型
%K 柱实验
%K 重金属离子
%K 运输
%K 非平衡过程
%K 铅
%K 模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=B850B4026F41EAA9BAA963101344B2FA&yid=9377ED8094509821&vid=EA389574707BDED3&iid=E158A972A605785F&sid=DB7B2C790D19BE6E&eid=421C41B8FD4D3EBA&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=35