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地球科学进展  2008, Vol. 23 Issue (11): 1193-1200    DOI: 10.11867/j.issn.1001-8166.2008.11.1193
研究论文     
干旱区绿洲土壤共存重金属元素形态变化及生物有效性实验分析
赵转军,南忠仁,王胜利,刘晓文,陶燕
兰州大学西部环境教育部重点实验室,资源环境学院,甘肃 兰州 730000
Experiments on Speciation and Bioavailability of Selected Heavy Metals in Arid Oasis Soil, Northwest of China
Zhao Zhuanjun,Nan Zhongren,Wang Shengli,Liu Xiaowen,Tao Yan
Key Laboratory of Western China's Environmental System(Ministry of Education), College of Resource and Environment, Lanzhou University, Lanzhou 730000, China
 全文: PDF(1369 KB)  
摘要:

采用盆栽试验,初步研究了干旱区绿洲土壤—胡萝卜系统中镉、锌、镍3种重金属的形态变化特征及其生物有效性问题。结果表明:供试绿洲土壤原状土中,Cd、Zn、Ni均以稳定的残渣态形式存在,而处理土壤中重金属被钝化的量有限,Cd的存在形式主要以碳酸盐态为主,Zn、Ni则主要以铁锰氧化态为主;3种元素的活性大小依次为Cd>Ni>Zn。根据回归分析,元素Zn对胡萝卜块茎和茎叶吸收Zn量贡献最大的分别是Zn的碳酸盐结合态和铁锰氧化态;元素Ni对胡萝卜各部位吸收贡献最大的均为Ni的铁锰氧化态。

关键词: 绿洲土壤重金属Cd、Zn、Ni形态分析复合作用生物有效性    
Abstract:

Using the Tessier A method, the three chemical forms of selected heavy metals were determined to investigate the speciation and bioavailability of selected heavy metals in arid oasis soil-plant system. The findings showed that the chemical form contents of metal Cd, Zn, and Ni mainly existed in residual fraction in untreated soils, while in treated oasis soils those about the exotic metal Cd, Zn, and Ni were found predominantly in carbonate forms to element Cd, and Fe-Mn oxides bound forms to metal Zn and Ni. The passivation of these heavy metals in oasis soil fluctuated smoothly and the activity order of selected heavy metals was Cd>Ni>Zn. According to the results of regression analysis, it was found that CAB-Zn and FMO-Zn made the significant contribution to the accumulation of metal Zn in the tuber and stem of Daucus Carota, and FMO-Ni to the accumulation of metal Ni in both tissues.

Key words: Oasis soils    Cd, Zn and Ni    Speciation analysis    Composite Action    Bioavailability
收稿日期: 2008-06-08 出版日期: 2008-11-10
:  P595  
基金资助:

国家自然科学基金项目“灌溉水pH与共存元素变化下干旱区绿洲土壤重金属纵向分异机理研究”(编号:40671167);国家环境保护公益性项目“干旱区绿洲土壤重金属污染生态风险评估与管理技术规范”(编号:200809098)资助.

通讯作者: 南忠仁(1962-),男,陕西渭南人,博士生导师,主要从事水土环境污染与生态修复方面的研究.     E-mail: nanzhongren@lzu.edu.cn
作者简介: 赵转军(1977-),女,甘肃秦安人,博士研究生,主要从事污染过程与生态修复方面的研究.E-mail:zhj_zhao@lzu.edu.cn
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引用本文:

赵转军,南忠仁,王胜利,刘晓文,陶燕. 干旱区绿洲土壤共存重金属元素形态变化及生物有效性实验分析[J]. 地球科学进展, 2008, 23(11): 1193-1200.

Zhao Zhuanjun,Nan Zhongren,Wang Shengli,Liu Xiaowen,Tao Yan. Experiments on Speciation and Bioavailability of Selected Heavy Metals in Arid Oasis Soil, Northwest of China. Advances in Earth Science, 2008, 23(11): 1193-1200.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2008.11.1193        http://www.adearth.ac.cn/CN/Y2008/V23/I11/1193

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