| 绿洲区土壤镍的吸附解吸特性 |
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| 引用本文： | 王胜利,武文飞,南忠仁,廖琴,周婷,刘姣,晋王强,赵翠翠,王兵.绿洲区土壤镍的吸附解吸特性[J].干旱区研究,2010,27(6). |
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| 作者姓名： | 王胜利 武文飞 南忠仁 廖琴 周婷 刘姣 晋王强 赵翠翠 王兵 |
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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,甘肃,兰州,730000 |
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| 基金项目： | 兰州大学中央高校基本科研业务费专项资金，国家环境保护公益性项目，兰州大学西部环境教育部重点实验室开放课题基金 |
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| 摘 要： | 土壤重金属的移动性和生物有效性与重金属的吸附解吸及形态分布密切相关.通过序批试验、单步提取和连续提取的方法,研究绿洲区土壤镍(Ni)的吸附解吸特性.结果发现:①所研究的土壤呈现碱性,具低有机质含量和高碳酸盐含量特征,土壤未被镍所污染;②Freundlich可以用来模拟绿洲区土壤对镍的吸附行为.吸附能力与土壤粉粒、黏粒、全磷、有机质、CEC成显著正相关,而与砂粒成显著负相关,土壤pH并不是影响绿洲区土壤吸附镍的重要因子,绿洲区土壤对镍的吸附不是哪一个土壤理化参数所控制,而可能是土壤理化参数的联合控制;③绿洲区土壤镍的解吸量随土壤中镍吸附量的增加而增加,土壤镍解吸量与解吸前吸附量的关系可以用幂函数进行模拟;④在添加50 mg/L镍的条件下,绿洲区土壤吸附的镍主要以铁-锰结合态、碳酸盐结合态和可交换态为主.
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| 关 键 词： | 绿洲 土壤 重金属 镍(Ni) 吸附量 解吸量 形态分布 张掖 |
Study on Sorption and Desorption of Nickel in Soil Samples Collected from Oases |
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| WANG Sheng-li,WU Wen-fei,NAN Zhong-ren,LIAO Qin,ZHOU Ting,LIU Jiao,JIN Wang-qiang,ZHAO Cui-cui,WANG Bing.Study on Sorption and Desorption of Nickel in Soil Samples Collected from Oases[J].Arid Zone Research,2010,27(6). |
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| Authors: | WANG Sheng-li WU Wen-fei NAN Zhong-ren LIAO Qin ZHOU Ting LIU Jiao JIN Wang-qiang ZHAO Cui-cui WANG Bing |
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| Institution: | WANG Sheng-li,WU Wen-fei,NAN Zhong-ren,LIAO Qin,ZHOU Ting,LIU Jiao,JIN Wang-qiang,ZHAO Cui-cui,WANG Bing ( Key Laboratory of Western China's Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China) |
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| Abstract: | The mobility and bioavailability of heavy metals depend on the sorption,desorption and chemical forms. Laboratory experiments,single extraction procedure,sequential extraction and simple correlation analysis were carried out to study the sorption and desorption of nickel ( Ni) in soil samples collected from oases and the speciation of sorbbed Ni. Soil samples were characterized by the low organic matter content and high CaCO3 and could be considered uncontaminated. Sorption of Ni in soils was well described... |
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| Keywords: | oasis soils heavy metals nickel sorption desorption fraction distribution Zhangye City |
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