首页 | 本学科首页   官方微博 | 高级检索  
     检索      

Effect of incubation temperature and wet-dry cycle on the availabilities of Cd, Pb and Zn in soil
作者姓名:SI Ji-tao  TIAN Bao-guo  WANG Hong-tao
作者单位:Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
基金项目:The Strategic Environment Research and Development Program, USA and Alcoa Foundation "Sustainable Development of Rural Area in China
摘    要:The effect of incubation temperature and wet-dry cycle on the availabilities of Cd, Pb and Zn was studied. Three soils with pH ranging from 3.8 to 7.3, organic carbon (OC) from 0.7% to 2.4%, and clay from 12.3% to 35.6% were selected. Soils were spiked with reagent grade Cd(NO3)2, Pb(NO3)2, and Zn(NO3)2 at concentrations of 30 mg Cd/kg soil, 300 mg Zn/kg soil and 2000 mg Pb/kg soil. The soils were incubated at 35, 60, 105℃, respectively and went through four wet-dry cycles. Metal availability in soils was estimated by soil extraction with 0.1 mol/L Ca(NO3)2. According to this study, the effect of the spiking temperature on the metal availabilities was different among the metals, soils and wet-dry cycles. Mostly, 35 ~C was the first recommended spiking temperature for Cd and Pb while no spiking temperature was obviously better than others for Zn. Three wet-dry cycles was recommended regardless of the type of metals and incubation temperature.

关 键 词:    土壤污染化学  温度  
文章编号:1001-0742(2006)06-1119-05
收稿时间:2005-11-21
修稿时间:2006-01-23

Effect of incubation temperature and wet-dry cycle on the availabilities of Cd, Pb and Zn in soil
SI Ji-tao,TIAN Bao-guo,WANG Hong-tao.Effect of incubation temperature and wet-dry cycle on the availabilities of Cd, Pb and Zn in soil[J].Journal of Environmental Sciences,2006,18(6):1119-1123.
Authors:SI Ji-tao  TIAN Bao-guo and WANG Hong-tao
Institution:Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
Abstract:The effect of incubation temperature and wet-dry cycle on the availabilities of Cd, Pb and Zn was studied. Three soils with pH ranging from 3.8 to 7.3, organic carbon (OC) from 0.7% to 2.4%, and clay from 12.3% to 35.6% were selected. Soils were spiked with reagent grade Cd(NO3)2, Pb(NO3)2, and Zn(NO3)2 at concentrations of 30 mg Cd/kg soil, 300 mg Zn/kg soil and 2000 mg Pb/kg soil. The soils were incubated at 35, 60, 105°C, respectively and went through four wet-dry cycles. Metal availability in soils was estimated by soil extraction with 0.1 mol/L Ca(NO3)2. According to this study, the effect of the spiking temperature on the metal availabilities was different among the metals, soils and wet-dry cycles. Mostly, 35°C was the first recommended spiking temperature for Cd and Pb while no spiking temperature was obviously better than others for Zn. Three wet-dry cycles was recommended regardless of the type of metals and incubation temperature.
Keywords:availability  wet-dry cycle  cadmium (Cd)  zinc (Zn)  lead (Pb)
本文献已被 CNKI 维普 万方数据 ScienceDirect PubMed 等数据库收录!
点击此处可从《环境科学学报(英文版)》浏览原始摘要信息
点击此处可从《环境科学学报(英文版)》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号