| 土壤富里酸对铅的吸附作用与影响因素的研究 |
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| 引用本文： | 翟莹雪,魏世强.土壤富里酸对铅的吸附作用与影响因素的研究[J].农业环境科学学报,2010,29(Z1). |
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| 作者姓名： | 翟莹雪 魏世强 |
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| 作者单位： | 1. 西南大学地理科学学院,重庆,400715
2. 西南大学资源与环境学院,重庆,400715 |
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| 基金项目： | 西南大学青年基金项目(SWNUQ2004009) |
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| 摘 要： | 采用改进的连续电位滴定法,研究了土壤富里酸对重金属铅吸附量的主要影响因素。通过调节富里酸溶液的pH值、富里酸浓度、温度和离子强度,得到吸附量的变化情况,结果表明:溶液pH从10.0滴定至2.5,富里酸对铅的吸附量降低,pH对吸附量的影响可用自然对数方程进行拟合,通过各处理中自然对数方程的比较得出,富里酸浓度越小、金属离子浓度越大,方程的斜率越大,说明吸附量的大小同时与二者密切相关;溶液中富里酸浓度升高,相应的吸附量降低,但吸附率升高;温度升高,吸附量增加;离子强度在设定的范围内,从0.1 mol.L-1加大至0.5 mol.L-1,吸附量逐步降低。
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| 关 键 词： | 富里酸 铅 电位滴定 吸附 |
Influencing Factors and Lead Adsorption by Soil Fulvic Acid |
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| ZHAI Ying-xue,WEI Shi-qiang.Influencing Factors and Lead Adsorption by Soil Fulvic Acid[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2010,29(Z1). |
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| Authors: | ZHAI Ying-xue WEI Shi-qiang |
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| Institution: | 1.School of Geographical Sciences/a>;Southwest University/a>;Chongqing 400715/a>;China/a>;2.School of Resources and Environment/a>;China |
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| Abstract: | In soil,FA(fulvic acid) can control the lead ions' biologic validity,which can be influenced by several soil conditions such as FA concentration,pH,temperature and ion strength in FA-lead solution.In this study the modified potentiometrictitration was used.We changed the pH,the concentration of FA,the temperature and the ion strength in FA-lead solution and found that this four matters above can all affect the interaction of FA with lead ions.By titrating the FA-lead solution,the conclusion could be drawn a... |
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| Keywords: | fulvic acid lead potentiometrictitration adsorption |
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