华东师范大学学报(自然科学版) ›› 2006, Vol. 2006 ›› Issue (6): 125-130.

• 环境科学 • 上一篇    下一篇

草木灰对土壤中敌草隆吸附及微生物降解行为的影响

邱宇平1, 程海燕1, 龚兵丽1, 盛光遥1,2   

  1. 1. 华东师范大学 环境科学系，200062 上海； 2. Department of Crop, Soil, and Environmental Sciences, University of Arkansas, AR 72701, USA
  • 收稿日期:2006-08-22 修回日期:2006-09-25 出版日期:2006-11-25 发布日期:2012-11-09
  • 通讯作者: 邱宇平

Influence of Wheat-Straw-Derived Ash on Diuron Sorption and Biodegradation in Soil(Chinese)

QIU Yu-ping1, CHENG Hai-yan1, GONG Bing-li1, SHENG Guang-yao 1,2

  

  1. 1. Department of Environmental Science, East China Normal University, Shanghai 200062, China; 2. Department of Crop, Soil, and Environmental Sciences, University of Arkansas, AR 72701, USA
  • Received:2006-08-22 Revised:2006-09-25 Online:2006-11-25 Published:2012-11-09
  • Contact: QIU Yu-ping

摘要： 研究了小麦秸秆、草木灰、黑碳和含灰土对农药敌草隆的吸附行为以及敌草隆在含灰土和无灰土中的微生物降解速率.研究表明：敌草隆在无灰土和小麦秸秆上的吸附是分配过程，log Koc分别为2.33和2.07；草木灰还田与秸秆还田相比，敌草隆的田间吸附量将提高9.7倍；从草木灰分离的黑碳对敌草隆的吸附能力要比草木灰高7~45倍，敌草隆在含灰土上的吸附量是无灰土的3倍多，陈化1年不能降低含灰土的吸附能力；敌草隆在无灰土和含灰土中的微生物降解符合一级动力学过程，土壤中加入0.5%的草木灰后，敌草隆的降解速率常数下降了45%，半衰期时间延长了66%.

关键词: 草木灰, 敌草隆, 土壤, 吸附, 微生物降解, 草木灰, 敌草隆, 土壤, 吸附, 微生物降解

Abstract: Sorption of diuron by wheat straw, its ash arising from burning, ashbased black carbon and ashamended soil was studied. The sorption of diuron on ashfree soil and wheat straw occurred via partitioning behavior with log Koc values of 2.33 and 2.07, respectively. The ash adsorbed 9.7 times more diuron than wheat straw when leaving them unburned in the field. Black carbon was 7~45 times more effective than ash and ashamended soil was 3 times more effective than ashfree soil in sorbing diuron over the range of the experimental concentrations. Aging of the ash for 1 year in the soil did not influence ash sorptivity. The biodegradation of diuron in the soil in the presence and absence of the ash was fitted to firstorder kinetics. The rate constant reduced by 45% and the half life increased by 66% when 0.5% ash was amended to the soil.

Key words: diuron, soil, sorption, biodegradation, wheat-straw-derived ash, diuron, soil, sorption, biodegradation

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