| 呼和浩特市大气降尘中镉赋存形态分析 |
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| 引用本文： | 赵锁志,王沛东,包凤琴,高征西,樊永刚,钟仁,张宝.呼和浩特市大气降尘中镉赋存形态分析[J].岩矿测试,2009,28(4):329-332. |
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| 作者姓名： | 赵锁志 王沛东 包凤琴 高征西 樊永刚 钟仁 张宝 |
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| 作者单位： | 1. 中国地质大学(北京)水资源与环境学院,北京,100083;内蒙古自治区地质调查院,内蒙古,呼和浩特,010020
2. 内蒙古自治区地质调查院,内蒙古,呼和浩特,010020 |
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| 基金项目： | 国土资源地质大调查--内蒙古河套农业经济区生态地球化学调查项目 |
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| 摘 要： | 采用Tessier连续提取法对呼和浩特市不同区域的9个大气降尘样品中镉的赋存形态进行了研究。结果表明,各形态含量在总镉中所占比例由大到小排列顺序依次是:铁锰氧化物结合态>残渣态>碳酸盐结合态>强有机结合态>可交换态。大气降尘中镉的5种形态占总镉的平均质量分数由大到小为:铁锰氧化物结合态31.80%,残渣态24.42%,碳酸盐结合态19.04%,强有机结合态14.61%,可交换态10.13%;铁锰氧化物结合态是主要存在形态;铁锰氧化物结合态镉、有机结合态镉、残留态镉这三种形态镉生物有效性很低,但当环境改变时可能发生镉释放,应予以关注。汽油和煤的燃烧以及工厂排放镉能加大城市大气降尘中的镉含量。
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| 关 键 词： | 镉 形态分析 大气降尘 呼和浩特市 |
| 收稿时间： | 2008/11/6 0:00:00 |
| 修稿时间： | 1/4/2009 12:00:00 AM |
Speciation Analysis of Cadimum in Dustfall of Huhhot City |
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| ZHAO Shuo-zhi,WANG Pei-dong,BAO Feng-qin,GAO Zheng-xi,FAN Yong-gang,ZHONG Ren,ZHANG Bao.Speciation Analysis of Cadimum in Dustfall of Huhhot City[J].Rock and Mineral Analysis,2009,28(4):329-332. |
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| Authors: | ZHAO Shuo-zhi WANG Pei-dong BAO Feng-qin GAO Zheng-xi FAN Yong-gang ZHONG Ren ZHANG Bao |
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| Institution: | 1.School of Water Resources & Environment, China University of Geosciences, Beijing 100083, China; 2.Institute of Inner Mongolia Geological Survey, Huhhot 010020, China) |
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| Abstract: | The speciation of Cd in 9 dustfall samples from different regions of Huhhot city was studied using Tessier extraction method. The results indicated that the distribution of Cd species in dusffall was in the order of: the species bound to Fe-Mn oxides (31.80%) > residual species (24.42%) > the species bound to carbonates (19.04%) > the species bound to organic (14.61%) > exchangeable species (10.13%). The bioactivity of exchangeable species and the species bound to carbonates are much higher than that of the other three species. But much attention should be paid for Cd releasing when environment changes. According to the analytical data, coal and petrol burning can increase Cd content in dusrfall of atmosphere in the city. |
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| Keywords: | cadimum speciation analysis dusffall Huhhot city |
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