| 模拟酸雨作用下红壤中CU2+的释放动力学 |
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| 引用本文： | 王芳,蒋新,王代长,余贵芬.模拟酸雨作用下红壤中CU2+的释放动力学[J].环境化学,2003,22(4):340-344. |
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| 作者姓名： | 王芳 蒋新 王代长 余贵芬 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金项目 ( 4 0 0 71 0 46,4983 1 0 0 5 )，国家重点基础研究发展规划项目 (G1 9990 1 1 80 1 3 ) . 2 ) |
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| 摘 要： | 利用土柱研究了模拟酸雨淋溶下红壤中铜离子的释放动力学 .结果表明 :铜离子的累积释放量随时间的延长迅速增加 ,2 4h后基本达到平衡 ,48h后铜离子的释放明显受酸雨pH值的影响 ,pH >3 5时铜离子的释放规律依然相同 ,但pH 2 5时释放量却再次增加 .该过程可分为快速释放阶段和准平衡阶段 ,可用修正的Elovich方程和双常数速率方程来描述 ,且修正的Elovich方程更优
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| 关 键 词： | 酸雨 红壤 Cu^2＋ 释放动力学 铜离子 环境污染 环境保护 |
KINETICS OF Cu2+ RELEASE FROM RED SOIL AS INFLUENCED BY SIMULATED ACID RAIN |
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| WANG Fang,JIANG Xin,WANG Dai zhang,YU Gui fen.KINETICS OF Cu2+ RELEASE FROM RED SOIL AS INFLUENCED BY SIMULATED ACID RAIN[J].Environmental Chemistry,2003,22(4):340-344. |
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| Authors: | WANG Fang JIANG Xin WANG Dai zhang YU Gui fen |
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| Abstract: | The soil columns were used to study the kinetics of copper release from red soil at the presence of simulated acid rain.Results showed that during the first 24 hours,the amount of Cu 2 accumulated in leachate rapidly increased and then almost remained at the same level as time went by.After 48 hour,the released copper kept unchanged at pH>3 5,while it increased very fast at pH 2 5 .The process of Cu 2 release could be divided into two stages:fast leaching stage and quasi equilibrium stage.The kinetics of Cu 2 release could be quantitatively described by modified Elovich equation and power function equation,and the former is better. |
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| Keywords: | simulated acid rain red soil Cu 2 kinetics |
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