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| 酸雨地区蔬菜对重金属的吸收及重金属健康风险基准的估算 | |
| 引用本文： | 许中坚,邱喜阳,冯涛,向言词,金元昌.酸雨地区蔬菜对重金属的吸收及重金属健康风险基准的估算[J].水土保持学报,2008,22(4). |
| 作者姓名： | 许中坚 邱喜阳 冯涛 向言词 金元昌 |
| 作者单位： | 1. 湖南科技大学,化学化工学院,湖南,湘潭,411201 2. 湖南科技大学,能源学院,湖南,湘潭,411201 3. 湖南科技大学,生命科学学院,湖南,湘潭,411201 |
| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)，湖南省自然科学基金，湖南省社会科学基金，湖南省高校骨干教师培养对象资助项目，湘潭市科技计划项目 |
| 摘 要： | 通过盆栽实验,以小白菜(上海青)、大白菜和萝卜为指示作物,研究了酸雨作用下Cu,Zn,Pb,Cd,Cr和Ni复合污染物在土壤-作物系统中的吸收与富集情况。结果表明,酸雨-重金属复合污染处理使Cu,Pb,Cr和Ni在蔬菜中积累量明显高于对照处理;Zn和Cd一般只有在复合污染处理中外源Zn或Cd含量较高时才明显高于对照处理。与对照相比,酸雨-重金属复合污染处理使Pb和Ni的富集系数增大,Cu的富集系数多数情况下增大,Cd的富集系数多数情况下减小,Zn和Cr富集系数的变化在不同蔬菜之间存在较明显的差异;重金属在不同蔬菜中的富集系数一般表现为萝卜>上海青>大白菜,蔬菜中不同重金属富集系数一般表现为Zn>Cd>Ni>Cu>Pb>Cr。酸雨-重金属复合污染条件下蔬菜中重金属积累量与其在土壤中总量之间的相关性均达到显著或极显著水平。以大宗蔬菜上海青、大白菜和萝卜为指示作物对酸雨地区蔬菜地中重金属的健康风险基准进行了估算,这对开展酸雨地区土壤重金属环境容量评价、重金属污染修复目标及地方性土壤环境质量标准的制订提供了参考依据。 |
| 关 键 词： | 酸雨 重金属 蔬菜 富集 健康风险基准 |
Uptake of Heavy Metals by Vegetables and Estimation of Guidelines for Health Risk to Heavy Metals in Vegetable Plantation Soil in Acid Rain Area |
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| XU Zhong-jian,QIU Xi-yang,FENG Tao,XIANG Yan-ci,JIN Yuan-chang.Uptake of Heavy Metals by Vegetables and Estimation of Guidelines for Health Risk to Heavy Metals in Vegetable Plantation Soil in Acid Rain Area[J].Journal of Soil and Water Conservation,2008,22(4). | |
| Authors: | XU Zhong-jian QIU Xi-yang FENG Tao XIANG Yan-ci JIN Yuan-chang |
| Abstract: | Pot experiments were actualized to investigate uptake and bioconcentration of heavy metals(Cu,Zn,Pb,Cd,Cr and Ni) in Pak-choi(Shanghaiqing),Pe-tsai and Radish under the influence of simulated acid rain.Compared to the control,the soil treated with simulated acid rain and heavy metals significantly enhanced the content of Cu,Pb,Cr and Ni in the vegetables,and generally,increased the content of Zn and Cd only under condition that the added Zn or Cd in the soil was quite high.Acid rain and heavy metal compound pollution makes bioconcentration factors(BCF) of Pb and Ni increased,Cu increased and Cd descended in the most cases,and BCF of Zn and Cr appear obvious difference among various vegetables.BCF of some heavy metal in various vegetables appears Radish > Pak-choi > Pe-tsai,and BCF of heavy metals in some vegetable appears Zn > Cd > Ni > Cu > Pb > Cr.Correlation coefficient between the total content of some heavy metal in the soil and its content in the vegetables attains a significant or a very significant level.Guidelines for health risk to heavy metals in the vegetable plantation soil was estimated according to BCF of heavy metals in Pak-choi,Pe-tsai and Radish.These results are important to develop environmental capacity assessment,and to draw remediation goal of soil heavy metals pollution and parochial soil ambient quality standards. |
| Keywords: | acid rain heavy metal vegetable bioconcentration guidelines for health risk |
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