| 外源硅对不同pH水田土壤吸附铅的影响 |
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| 引用本文： | 刘鸣达,陈蕾蕾,王耀晶. 外源硅对不同pH水田土壤吸附铅的影响[J]. 环境工程学报, 2012, 6(5): 1658-1662 |
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| 作者姓名： | 刘鸣达 陈蕾蕾 王耀晶 |
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| 作者单位： | 1. 沈阳农业大学土地与环境学院,沈阳,110866
2. 沈阳农业大学理学院,沈阳,110866 |
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| 基金项目： | 国家自然科学基金资助项目（41101290）；辽宁省教育厅创新团队项目（2009T086）；辽宁省自然科学基金资助项目（201102188） |
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| 摘 要： | 通过等温吸附实验,研究了加硅对2种不同pH水田土壤吸附铅特性的影响。实验中用硝酸中和硅酸钠的碱性,各处理间钠离子和硝酸根离子的差异以硝酸钠补齐,消除了因硅酸盐的加入改变体系pH及伴随离子对土壤吸附铅可能产生的影响。结果表明,在本实验条件下,Langmuir方程、Freundlich方程和Temkin方程都能较好地描述不同硅浓度条件下两种土壤对铅的吸附特征,但以Freundlich模型为最优;加硅促进了酸性土壤对铅的吸附,抑制了碱性土壤对铅的吸附。
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| 关 键 词： | 硅 铅 吸附 Freundlich方程 |
| 收稿时间： | 2010-09-07 |
Influence of silicon on adsorption of lead on paddy soil with different pH |
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| Liu Mingd,Chen Leilei and Wang Yaojing. Influence of silicon on adsorption of lead on paddy soil with different pH[J]. Techniques and Equipment for Environmental Pollution Control, 2012, 6(5): 1658-1662 |
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| Authors: | Liu Mingd Chen Leilei Wang Yaojing |
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| Affiliation: | 1.College of Land and Environmental Science,Shenyang Agricultural University,Shenyang 110866,China; 2.College of Science,Shenyang Agricultural University,Shenyang 110866,China) |
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| Abstract: | Adsorption isotherm experiments were conducted to investigate the effect of silicon on the adsorption of lead on paddy soils with different pH.HNO3 was used to neutralize the alkalinity of Na2SiO3.The difference of sodium ion and nitrate ion was completed with NaNO3.The effect of silicon addition on the pH of soil and the affection caused by the attendant ion were eliminated.The results showed that among the three isothermal absorption models(Langmuir,Freundlich and Temkin),the Freundlich was optimal to simulate the adsorption.When added the same amount silicon the impact of the adsorption of lead on the two soils was different,the adsorption capacity of lead in acid soils increased,and the capacity in alkaline soil decreased. |
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| Keywords: | silicon lead adsorption Freundlich equation |
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