| 绿洲土Cd、Pb、Zn、Ni复合污染下重金属的形态特征和生物有效性 |
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| 引用本文： | 武文飞,南忠仁,王胜利,周婷,廖琴,李程程.绿洲土Cd、Pb、Zn、Ni复合污染下重金属的形态特征和生物有效性[J].生态学报,2013,33(2):619-630. |
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| 作者姓名： | 武文飞 南忠仁 王胜利 周婷 廖琴 李程程 |
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| 作者单位： | 兰州大学资源环境学院,西部环境教育部重点实验室,兰州730000 |
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| 基金项目： | 国家自然科学基金(51178209, 91025015) |
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| 摘 要： | 通过模拟基于干旱区绿洲土壤Cd-Pb-Zn-Ni复合污染下的油菜盆栽试验,采用Tessier五步连续浸提法探究了重金属复合污染对油菜生长的影响及其各形态的转化归趋和生物有效性.结果显示,随着Cd-Pb-Zn-Ni复合胁迫水平的升高,油菜的干重先增加后减小,根系的生长由促进作用转变为抑制作用；对照土壤中4种重金属元素均以残渣态为主要赋存形态,可交换态的含量均很小；随着外源重金属的添加,油菜种植土壤中4种重金属元素的各形态含量随之增加,Cd、Pb、Zn的可交换态和Ni的碳酸盐结合态对外界胁迫响应强度最大,Cd、Pb、Zn、Ni的活性增加,且Cd、Pb的主要赋存形态迅速转变为碳酸盐结合态和铁锰氧化态,Zn的主要赋存形态由残渣态和碳酸盐结合态过渡到碳酸盐结合态和铁锰氧化态,Ni的主要赋存形态为碳酸盐结合态；Cd、Zn在茎叶中的含量大于根系,Pb、Ni反之,油菜能将Cd、Zn更多的运输至茎叶,Pb、Ni则主要积累在根系；油菜茎叶吸收Cd和油菜各部位吸收Zn的主要贡献形态为可交换态,根吸收Cd的主要贡献形态由可交换态转变为有机结合态,根吸收Pb和油菜各部位吸收Ni的主要贡献形态为碳酸盐结合态.
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| 关 键 词： | 重金属 复合污染 形态特征 生物有效性 |
| 收稿时间： | 2011/11/20 0:00:00 |
| 修稿时间： | 8/3/2012 12:00:00 AM |
Fractionation character and bioavailability of Cd, Pb, Zn and Ni combined pollution in oasis soil |
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| WU Wenfei,NAN Zhongren,WANG Shengli,ZHOU Ting,LIAO Qin and LI Chengcheng.Fractionation character and bioavailability of Cd, Pb, Zn and Ni combined pollution in oasis soil[J].Acta Ecologica Sinica,2013,33(2):619-630. |
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| Authors: | WU Wenfei NAN Zhongren WANG Shengli ZHOU Ting LIAO Qin and LI Chengcheng |
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| Institution: | Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China;Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China;Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China;Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China;Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China;Key Laboratory of Western China's Environmental Systems (Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University, Lanzhou 730000, China |
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| Abstract: | |
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| Keywords: | heavy metals combined pollution fractionation character bioavailability |
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