生态学杂志2011，Vol.30Issue(3)：424-429,6.
2,4-二氯苯酚在土壤与河流底泥中降解动力学
Degradation dynamics of 2,4-dichlorophenol in soil and river sediment
摘要
Abstract
Soil and sediment samples were collected from the sites along the banks of the fourth Liuhe River and in the River in Nanjing Chemical Industrial Park, and, through soil sterilization and the controlling of temperature and 2,4-DCP initial concentration, the degradation dynamics of 2,4-dichlorophenol (2,4-DCP) in the soils and river sediment and related affecting factors were studied. Microbes played dominant roles in degrading 2,4-DCP. Within 45 d, the degradation rate of 2,4-DCP in non-sterilized soils and river sediment was 1.5-3 and 1.4-2. 8 times of that in sterilized soils and river sediment, respectively. The microbe-degraded amount of 2,4-DCP in the soils and river sediment was 0. 128-0. 599 and 0. 113-0. 718 mg · kg-1 , respectively, and the half-life time of 2,4-DCP was shorter in non-sterilized than in sterilized treatment.Within the range of (10±1) ℃-(30±1 ) ℃, the degradation of 2,4-DCP was accelerated with increasing temperature. At (30± 1 ) ℃ , the residual amount of 2,4-DCP in the soils and river sediment was 0. 305 and 0. 203 mg · kg-1 , respectively, and the residual amount and half-life time were the smallest and shortest. The degradation speed of 2,4-DCP in the soils and river sediment was the fastest when its initial concentration was 0.5 mg · kg-1. With the increase of 2,4-DCP initial concentration, the degradation speed of 2,4-DCP had a decreasing trend, and the half-life time became longer.关键词
2,4-二氯苯酚/土壤/河流底泥/降解动力学/影响因子分类
资源环境引用本文复制引用
侯永侠,杨继松,陈红亮,宋雪英,胡晓钧,李玉双..2,4-二氯苯酚在土壤与河流底泥中降解动力学[J].生态学杂志,2011,30(3):424-429,6.基金项目
国家高技术研究计划项目(2007AA06A405)、国家水体污染控制与治理科技重大专项(2008ZX07208-009-005)、国家科技支撑计划课题(2011BAJ06B02)和辽宁省科技计划项目(2009223004)资助. （2007AA06A405）
