高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (5): 1180.doi: 10.7503/cjcu20121157

• 物理化学 • 上一篇    下一篇

自然水体中3种固相物质吸附有机氯农药的动力学特征

董德明, 兰馨辉, 郭志勇, 花修艺   

  1. 吉林大学地下水资源与环境教育部重点实验室, 水资源与水环境吉林省重点实验室, 环境与资源学院, 长春 130012
  • 收稿日期:2012-12-24 出版日期:2013-05-10 发布日期:2013-05-10
  • 通讯作者: 郭志勇, 男, 博士, 讲师, 主要从事环境化学方面的研究. E-mail: zyguo@jlu.edu.cn E-mail:zyguo@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 21277056, 20877033)和国家"水体污染控制与治理科技重大专项"基金(批准号: 2012ZX07202-009, 2009ZX07207-001-03)资助.

Sorption Kinetics of Organochlorine Pesticides on Three Types of Solids in Natural Waters

DONG De-Ming, LAN Xin-Hui, GUO Zhi-Yong, HUA Xiu-Yi   

  1. Key Lab of Groundwater Resources and Environment of Ministry of Education, Key Lab of Water Resources and Aquatic Environment of Jilin Province, College of Environment and Resources, Jilin University, Changchun 130012, China
  • Received:2012-12-24 Online:2013-05-10 Published:2013-05-10

PDF (PC)

被引次数

5

摘要：

研究了自然水体中生物膜、 悬浮颗粒物和表层沉积物3种典型固相物质对有机氯农药的吸附动力学特征. 研究结果表明, 有机氯农药在3种固相物质上的吸附动力学过程可分为快吸附阶段和慢吸附阶段. 准二级动力学模型较好地描述了三者对有机氯农药的吸附动力学过程. 吸附平衡时, 3种固相物质对有机氯农药吸附量的大小与它们的有机质含量顺序一致, 即, 生物膜>悬浮颗粒物>表层沉积物; 而在吸附初期阶段, 有机质含量最低的表层沉积物对有机氯农药的吸附速率最快, 吸附量的波动变化幅度最大, 其次为悬浮颗粒物和生物膜.

关键词: 生物膜, 悬浮颗粒物, 沉积物, 有机氯农药, 吸附, 动力学

Abstract:

This study investigates the sorption kinetics of organochlorine pesticides on three typical types of solids involving biofilms, suspended particles and surface sediments sampled from natural waters. Results indicated that the process of sorption kinetics of organochlorine pesticides on the three solids could be divided into two stages: fast sorption and slow sorption. Pseudo-second-order model could provide a more satisfactory fitting performance in this work. Equilibrium sorbed amount of organochlorine pesticides by the three solids showed the order: biofilms>suspended particles>surface sediments, which is consistent with the order of contents of organic matters in these solids. However, during the initial sorption stage, the rate of organochlorine pesticides sorbed by the surface sediments, which contain the least organics, was the fastest and the extent of variation of sorbed amount was the greatest, followed by suspended particles and biofilms.

Key words: Biofilm, Suspended particles, Sediments, Organochlorine pesticide, Sorption, Kinetics

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