| 南海湖沉积物中生物有效态重金属含量及其空间分布 |
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| 引用本文： | 梁英,何江,吕昌伟,樊庆云,宝金花.南海湖沉积物中生物有效态重金属含量及其空间分布[J].农业环境科学学报,2009,28(6). |
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| 作者姓名： | 梁英 何江 吕昌伟 樊庆云 宝金花 |
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| 作者单位： | 1. 内蒙古大学生态与环境科学系,内蒙古,呼和浩特,010021;包头市环境监测站,内蒙古,包头,014030
2. 内蒙古大学生态与环境科学系,内蒙古,呼和浩特,010021 |
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| 摘 要： | 为判识湖泊沉积物中重金属的地球化学行为特征及其控制因素,以包头市南海湖为研究对象,采用连续提取法,系统开展了沉积物中生物有效态重金属的分布研究.结果表明,表层沉积物中重金属生物有效态(前4态之和)的平均比例序列为Cd>Pb>Zn>Cu;Cu的生物有效态占总量的比例为23%,Pb为75%,Zn为42%,Cd为83%.总体而言,表层沉积物中Cd和Ph的潜在危害性最大.湖心区、西南和东北部湖区为表层沉积物中Cu、Ph和Zn的生物有效态含量高值区,Cd仅在两南湖区表现高值.有机物结合态为沉积物柱芯中Cu和Cd生物有效态的主导形态,铁锰氧化物结合态为Pb和Zn生物有效态的主导形态.强还原性条件下,沉积物中以铁锰氧化物结合态为主导形态的Pb、Zn、Cd有一定的潜在风险,Cu的潜在危害较小.与黄河沉积物重金属形态百分比的对比分析表明,南海湖沉积物对重金属的固定能力更强.
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| 关 键 词： | 沉积物 重金属 生物有效态 南海湖 |
Concentration and Spatial Distribution of Bio-available Fraction of Heavy Metals in the Sediments from the Nanhai Lake |
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| LIANG Ying,HE Jiang,LV Chang-wei,FAN Qing-yun,BAO Jin-hua.Concentration and Spatial Distribution of Bio-available Fraction of Heavy Metals in the Sediments from the Nanhai Lake[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2009,28(6). |
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| Authors: | LIANG Ying HE Jiang LV Chang-wei FAN Qing-yun BAO Jin-hua |
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| Institution: | 1. Department of Ecology and Environmental Science;Inner Mongolia University;Huhhot 010021;China;2. Baotou Environmental Monitoring Center;Baotou 014030;China |
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| Abstract: | The contents of bio-available fractions of Cu, Pb, Zn and Cd in sediments of the Nanhai Lake which was an abandoned channel of the Yellow River were analyzed in this work to study the geochemical behavior of heavy metals in lake sediments and the controlling factors. The results showed that the contents of bio-available fractions of Cu, Pb, Zn and Cd in surface sediments were ranked as Zn>Pb>Cu>Cd; The percentages of bio-available fractions in total contents were 23% for Cu, 75% for Pb, 42% for Zn, and 83% ... |
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| Keywords: | sediments heavy metal bio-available fractions the Nanhai Lake |
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