| Hg在玲珑金矿区典型农田土壤中的吸附特征研究 |
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| 引用本文： | 王斐,王敏,唐景春,张磊.Hg在玲珑金矿区典型农田土壤中的吸附特征研究[J].环境科学,2011,32(9):2669-2675. |
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| 作者姓名： | 王斐 王敏 唐景春 张磊 |
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| 作者单位： | 南开大学环境科学与工程学院，环境污染过程与基准教育部重点实验室，天津 300071;南开大学环境科学与工程学院，环境污染过程与基准教育部重点实验室，天津 300071;南开大学环境科学与工程学院，环境污染过程与基准教育部重点实验室，天津 300071;青岛农业大学资源与环境学院,青岛 266109 |
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| 基金项目： | 山东省自然科学基金项目(2009ZRB019E5) |
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| 摘 要： | 采集烟台玲珑金矿区不同性质的土壤,通过吸附解析实验研究了矿区2种典型农田土壤对重金属汞的吸附特征.等温吸附-解吸实验结果表明,酸性土壤对Hg（Ⅱ）的平均吸附率高于中性土壤,中性土对Hg（Ⅱ）的最大吸附量为156.9μg/g,酸性土达到201.38μg/g.2种土壤结合Hg（Ⅱ）的解吸量和解吸率都较低,且酸性土的解吸率（...
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| 关 键 词： | 汞 金矿区 土壤 吸附 pH 动力学方程 |
| 收稿时间： | 2010/10/24 0:00:00 |
| 修稿时间： | 2010/12/16 0:00:00 |
Absorption of Hg in Typical Farmland Soils in the Linglong Gold Mining Area |
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| WANG Fei,WANG Ming,TANG Jing-chun and ZHANG Lei.Absorption of Hg in Typical Farmland Soils in the Linglong Gold Mining Area[J].Chinese Journal of Environmental Science,2011,32(9):2669-2675. |
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| Authors: | WANG Fei WANG Ming TANG Jing-chun and ZHANG Lei |
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| Institution: | WANG Fei1,WANG Ming1,TANG Jing-chun1,ZHANG Lei2(1.Key Laboratory of Pollution Process and Environmental Criteria(Ministry of Education),College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China,2.College of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,China) |
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| Abstract: | This study focused on the adsorption properties of Hg in 2 typical farmland soils in the Linglong gold mining area in Yantai area of China. The adsorption-desorption of Hg(II) research result showed higher adsorption of Hg in neutral soil with the value of 201.38 microg/g than that in acid soil with the value of 156.9 microg/g. The desorption of Hg in both soils was low with neutral soil showing a higher desorption ratio (13%) than acid soil (12%). Hg(II) adsorption isotherms were well fitted by Langmuir and Freundlich equation in the acid soil, with the correlation coefficient r value of 0.995 6 and 0.982 6, respectively. Langmuir equation can best describe Hg(II) adsorption isotherm in the neutral soil and acid soil, with the r value of 0.995 6 and 0.955 9, respectively. The adsorption was a bi-phasic process which started with a fast-adsorption phase and a slow-adsorption phase. The adsorption amount and rate of Hg in the fast reaction phase were much larger than that in the slow one. The adsorption kinetic can be better fitted by Elovich equation with correlation coefficient of 0.971 4 and 0.967 2, respectively. At pH 3.0 - 5.5, the equilibrium adsorption amount of Hg(II) increased with higher pH, and then decreased when the pH reached 6.5. |
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| Keywords: | Hg gold mining area soil adsorption pH kinetic equation |
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