| 模拟酸雨对南方红壤镉释放的影响 |
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| 引用本文： | 许中坚,刘广深.模拟酸雨对南方红壤镉释放的影响[J].生态与农村环境学报,2004,20(4):27-31. |
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| 作者姓名： | 许中坚 刘广深 |
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| 作者单位： | 1. 湖南科技大学,化学化工学院,生物与环境工程系,湖南,湘潭,411201
2. 浙江大学,环境科学研究所,浙江,杭州,310029 |
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| 基金项目： | 国家自然科学基金资助项目(49973031) |
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| 摘 要： | 采用室内模拟酸雨淋溶土柱的方法,研究了酸雨对2种红壤镉释放的影响。结果表明,酸雨加速了红壤中镉的释放。在pH4.5的酸雨作用下,镉的平均释放水平是对照的1.6～1.7倍,在pH3.5的酸雨作用下,镉的平均释放水平是对照的2.0～6.5倍。经过相当于9150～10650mm降水量的淋溶后,pH4.5的酸雨使红壤镉的累积释放量提高63.0%～80.0%,pH3.5的酸雨使其提高102.7%～630.6%。红壤镉的释放与铝、铁的释放具有极显著或显著相关性。酸雨对镉释放的影响可增加水体中镉的负荷,从而加重镉对人类的直接或潜在危害。
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| 关 键 词： | 酸雨 红壤 镉 释放 |
| 文章编号： | 1001-5906(2004)04-0027-05 |
| 修稿时间： | 2004年2月23日 |
Effect of simulated acid rain on release of cadmium from red soils |
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| XU Zhong-jian,LIU Guang-shen.Effect of simulated acid rain on release of cadmium from red soils[J].Journal of Ecology and Rural Environment,2004,20(4):27-31. |
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| Authors: | XU Zhong-jian LIU Guang-shen |
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| Institution: | XU Zhong-jian~1,LIU Guang-shen~2 |
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| Abstract: | A soil column leaching experiment was designed and conducted to investigate effect of simulated acid rain on release of cadmium from two kinds of red soils.The results show that acid rain can accelerate release of cadmium from red soils.The average release rate of cadmium was 1.6-1.7 times as high as the control under the impact of acid rain of pH 4.5,and 2.0-6.5 times when the acid rain was pH 3.5.After leaching with 9 150-10 650 mm acid rain of pH 4.5,the cumulative Cd release increased by 63.0%-80.0% and that of pH 3.5 by 102.7%-630.6%.The release of Cd was in significant or extremely significant correlation with the release of Al and Fe.The effect of acid rain on release of cadmium from soils can increase the load of cadmium in water,thus directly or indirectly undermining health of the people. |
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| Keywords: | acid rain red soil cadmium |
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