Study of Atrazine Desorption on Different Soils in Jilin Province

SUN Jing; MA Xiulan; LIU Xin; ZHANG Jing; LI Ting; ZHANG Hao; WANG Yujun

doi:10.13870/j.cnki.stbcxb.2019.04.044

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Study of Atrazine Desorption on Different Soils in Jilin Province

更新时间：2025-03-12

- Study of Atrazine Desorption on Different Soils in Jilin Province
- Vol. 33, Issue 4, Pages: 315-320(2019)
- 作者机构：
  
  1. 吉林农业大学资源与环境学院,长春,130118
  2. 农业部产地环境污染防控重点实验室, 天津市农业环境与农产品安全重点实验室,天津,300011
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.04.044
  CLC： S-3
- Published：2019
- 稿件说明：
移动端阅览
SUN Jing, MA Xiulan, LIU Xin, et al. Study of Atrazine Desorption on Different Soils in Jilin Province[J]. 2019, 33(4): 315-320.
DOI：

SUN Jing, MA Xiulan, LIU Xin, et al. Study of Atrazine Desorption on Different Soils in Jilin Province[J]. 2019, 33(4): 315-320. DOI： 10.13870/j.cnki.stbcxb.2019.04.044.

摘要

为了探究莠去津污染土壤中莠去津的解吸特性，通过批量平衡法，研究了莠去津在白浆土、黑土、盐碱土上的解吸特征及影响因子。结果表明：3种土壤类型中莠去津的解吸过程经历了快速解吸、慢速解吸、最终达到解吸平衡3个阶段，平衡时间为720 min；采用准二级动力学方程拟合效果最好。Freundlich方程可以较好地描述莠去津在3种土壤中的解吸等温曲线（R2>0.969）。ΔG<0，ΔH>0，ΔS>0说明其解吸为自发吸热且无序的过程。莠去津在盐碱土中的解吸率最高，其次为黑土，白浆土解吸率最低。土壤pH升高或添加生物炭均能够降低莠去津在土壤中的解吸。

Abstract

To investigate the desorption characteristics of atrazine in different soils contaminated by atrazine

the desorption behavior and its affecting factors were studied by batch balance method in albic soil

black soil

and saline soil. The results showed that the process of atrazine desorption in the three soils experienced three stages:rapid desorption

slow desorption and finally desorption equilibrium

and the equilibrium time was 12 h. Freundlich equation could better describe the desorption isotherm curve of atrazine in three soils (R2>0.969). ΔG<0

ΔH>0

ΔS>0. This indicated that desorption was a spontaneous and disordered process of heat absorption. Atrazine had the highest desorption rate in saline soil

followed by black soil and albic soil. Increasing the pH value of soil or adding biochar could reduce the desorption capacity of atrazine in soil.

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