节点文献

紫色土干湿交替条件下邻苯二甲酸二甲酯迁移释放研究

Migration and Release of Dimethyl Phthalate in Purple Soil under Dry-Wet Alternation

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 易平曾微罗萌方丹丹王强

【Author】 YI Ping;ZENG Wei;LUO Meng;FANG DANDan;WANG Qiang;College of Resources and Enviorment Sciences,Southwest University;Chongqing Key Laboratory of Agricultural Resources and Environment Research;Chongqing Shengya Environmental Protection Consulting Co.,Ltd.;

【通讯作者】 王强;

【机构】 西南大学资源环境学院重庆市农业资源与环境研究重点试验室重庆盛雅环保咨询有限公司

【摘要】 以三峡库区消落带典型土壤(紫色土)为对象,探讨消落带干湿交替过程中邻苯二甲酸二甲酯(DMP)在上覆水-间隙水-土壤之间的迁移释放特征。结果表明:土壤中DMP含量在两次淹水初期(0~2 d)明显下降,从第3天有反弹增高的趋势;间隙水、上覆水中DMP浓度总体呈现出微弱的增加、降低、再增加、再降低的振荡变化;两次落干初期(0~1 d),土壤中DMP均有不同程度的上升,在2~4 d有不同程度的下降,8~20 d时基本稳定在同一水平。土壤中初始DMP含量10~100mg·kg-1淹水后在三相间的迁移释放趋势相似,然而当土壤初始DMP含量增加至200 mg·kg-1后,上覆水DMP含量出现了与其他三组不同的变化趋势,三相间DMP的分配波动更大。准二级动力学方程可以很好地描述间隙水和上覆水中DMP向土壤中迁移的过程,相关性分析表明,间隙水和上覆水DMP浓度存在显著正相关的关系(P<0.05),而土壤与间隙水中DMP浓度呈现较弱的负相关。

【Abstract】 【Objective】This paper is to characterize dimethyl phthalate(DMP) migration and release between overlying water, pore water and soil in the water level fluctuating zone of the Three-Gorges Reservoir during the wetting-drying alternation period.【Method】For the study a flooding experimental device was designed to carry out cyclical wet-dry alternation test using the "flooding-drying" model. 【Result】DMP content was found decreasing significantly in the soil during the first days(0~2 d) of the two flooding periods, but increasing from the third day on, and fluctuating slightly in the pore water and overlying water;it displayed a rising trend to a varying extent in the soil on the first days(0~1 d) of the two drying periods, and a declining one varying in degree on the following two days(2~4 d), and then leveled off during the late period(8~20 d). Soils with initial DMP content varying in the range of 10~100 mg·kg-1, when flooded, showed a similar trend in DMP migration and release between the three phases. However, DMP content in the overlying water showed a different trend from the other three groups, and the DMP distribution fluctuated greatly in the three phases,when soil initial DMP content was 200 mg·kg-1.【Conclusion】The quasi-second-order kinetic equation can be used to well describe migration of DMP in pore water and overlying water into the soil. Correlation analysis shows a significant positive correlation(P<0.05) exists between pore water and overlying water in DMP concentration, but a mildly negative one between soil and pore water.

【基金】 国家重点研发计划重点专项项目(2017YFD0801000);西南大学生态学重点学科“211工程”建设项目共同资助~~
  • 【文献出处】 土壤学报 ,Acta Pedologica Sinica , 编辑部邮箱 ,2019年05期
  • 【分类号】X53
  • 【网络出版时间】2019-04-03 15:05
  • 【被引频次】1
  • 【下载频次】132
节点文献中: 

本文链接的文献网络图示:

本文的引文网络