| 腐殖酸对钴、镉作用的研究 |
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| 引用本文： | 吕福荣,刘艳.腐殖酸对钴、镉作用的研究[J].大连大学学报,2002,23(4):63-67. |
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| 作者姓名： | 吕福荣 刘艳 |
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| 作者单位： | 大连大学,化学与化学工程系,辽宁,大连,116622 |
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| 摘 要： | 本文采用碱溶酸沉法提取土壤中的腐殖酸,研究对Co2+、Cd2+的吸附作用机理.结果表明:最佳pH范围为6～7,吸附过程属于放热过程.用该种腐殖酸样品吸附Co2+服从Langmuir和Freudlich吸附等温模型,19℃、35℃、45℃的饱和吸附量为12.51、9.52、8.30mg/g;吸附Cd2+在19℃、35℃时服从Langmuir和Freundlich吸附等温模型,饱和吸附量为33.90、33.43mg/g,但在45℃时主要服从Freundlich吸附等温模型.腐殖酸对Co2+、Cd2+的吸附是通过两级络合反应形成配合物的方式结合.
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| 关 键 词： | 腐殖酸 钴 镉 吸附 |
| 文章编号： | 1008-2395(2002)04-0063-05 |
| 修稿时间： | 2000年12月5日 |
Study on adsorption of Co2+, Cd2+ on humic acid |
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| L.Study on adsorption of Co2+, Cd2+ on humic acid[J].Journal of Dalian University,2002,23(4):63-67. |
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| Authors: | L |
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| Abstract: | The humic acid (HA), extracted from soils by alkali and acid was used to study the adsorption mechanism of Co2+, Cd2+. The results show that the best pH ranges from 6 to 7 and the adsorption procedure is exothermic reaction. The adsorption of Co2+ on HA fits for Langmuire and Freundlich adsorption equation, the amount of adsorption at the temperature of 19℃、 35℃、 45℃ are 12.51, 9.52, 8.30 mg/g respectively. The adsorption of Cd2+ on HA fits for Langmuire and Freundlich adsorption equation at the temperature of 19℃、 35℃, the amount of adsorption are 33.90, 33.30 mg/g respectively; however, at 45℃ it mainly fits for Freundlich adsorption equation. The adsorption of Co2+ ,Cd2+ on HA is in the way of forming complex compound through second order complex reaction. |
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| Keywords: | humic acid Co2 + Cd2 + adsorption |
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