The Adsorption Characteristic Research of Pb in Reservior Sediment

REN Lijie; MA Xiulan; BIAN Weitao; WANG Fumin; WANG Yujun; DUAN Junya

doi:10.13870/j.cnki.stbcxb.2016.05.042

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The Adsorption Characteristic Research of Pb in Reservior Sediment

更新时间：2025-03-12

- The Adsorption Characteristic Research of Pb in Reservior Sediment
- Vol. 30, Issue 5, Pages: 255-260(2016)
- 作者机构：
  
  吉林农业大学资源与环境学院,长春,130118
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2016.05.042
  CLC： X524
- Published：2016
- 稿件说明：
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REN Lijie, MA Xiulan, BIAN Weitao, et al. The Adsorption Characteristic Research of Pb in Reservior Sediment[J]. 2016, 30(5): 255-260.
DOI：

REN Lijie, MA Xiulan, BIAN Weitao, et al. The Adsorption Characteristic Research of Pb in Reservior Sediment[J]. 2016, 30(5): 255-260. DOI： 10.13870/j.cnki.stbcxb.2016.05.042.

摘要

为了探究Pb在底泥和土壤中的吸附行为，通过OECD guideline 106平衡吸附法，来探讨Pb在底泥和土壤中的吸附特性以及不同pH、有机质和N、P含量对Pb吸附特性的影响。结果表明：Temkin模型能够更好地拟合底泥对Pb的吸附，r=0.925；Freundlich能够更好地拟合土壤对Pb的吸附，r=0.971。Pb在15，25，35 ℃下吸附条件下，温度升高会促进底泥和土壤对Pb的吸附，ΔＧ＜0，ΔＨ＞0，说明底泥和土壤对Pb吸附为自发的吸热反应；在pH为3～11的条件下，Pb的吸附量随pH的升高呈现出先升高后逐渐趋于平缓的趋势，当pH=5时吸附效果最好。样品去除有机质后，底泥和土壤对Pb的吸附量减少，分别减少了121.6，87.4 mg/kg。随着溶液中N、P浓度的增加底泥和土壤对Pb的吸附量逐渐减小，推断是因为N、P加入时携带加入K+，K+与Pb产生了竞争吸附导致Pb的吸附量的降低。

Abstract

In order to study the adsorption behavior of lead in sediment and soil

the adsorption of Pb adsorption in sediment and soil were investigated by batch equilibrium studies according to OECD guideline 106

and the influence of the pH

organic matter and N

P concentration on adsorption process were also discussed in this study. The results showed that the adsorption isotherm of Pb was well fitted with the Temkin equation in the soil

the correlation constant were 0.925; the adsorption isotherm of Pb was well fitted with the Freundlich equation in the soil

the correlation constant were 0.971. Study showed that

Pb under the adsorption condition of 15

25 and 35℃

with the increase of temperature

the adsorption of Pb in sediment and soil would be strengthened

ΔG＜0

ΔH＞0

revealed that the adsorption of Pb in the sediment and soil was a spontaneously endothermic process. Study showed that

under the pH condition of 3～11

the Pb adsorption quantity increased with the increase of pH

after the first increased and then to be gentled. When the pH was equal to 5

the adsorption effect was best. After removal of the organic matter the adsorption amount of Pb in sediment and soil decreased by 121.6

87.4 mg/kg

respectively. With the increase of N

the adsorption amount of Pb in sediment and soil decreased

which might be due to with the carrying of N

the K+ was added

and it had a competitive adsorption of Pb led to reducing adsorption capacity of Pb.

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