研究报告

  • 邓敏杰,陈硕,全燮,于洪涛,赵慧敏.天然/模拟海水中2,4,6-三溴苯酚的光化学行为研究[J].环境科学学报,2017,37(9):3427-3433

  • 天然/模拟海水中2,4,6-三溴苯酚的光化学行为研究
  • Photochemical reaction of 2,4,6-tribromophenol in natural/artificial seawater
  • 基金项目:国家自然科学基金重大项目课题(No.21590813)
  • 作者
  • 单位
  • 邓敏杰
  • 大连理工大学 环境学院, 大连 116024
  • 陈硕
  • 大连理工大学 环境学院, 大连 116024
  • 全燮
  • 大连理工大学 环境学院, 大连 116024
  • 于洪涛
  • 大连理工大学 环境学院, 大连 116024
  • 赵慧敏
  • 大连理工大学 环境学院, 大连 116024
  • 摘要:有机溴代苯酚类污染物在水体中普遍存在,尤其在海洋环境中,除人为污染源外,它还存在广泛的天然来源.以2,4,6-三溴苯酚为模型化合物,以氙灯(λ> 290 nm) 作为模拟太阳光源,研究了海水中溴代苯酚的光化学过程,并系统考察了溴代苯酚初始浓度、Cl-、Fe(Ⅲ)和pH值等环境因素的影响.实验结果表明,在海水中,2,4,6-三溴苯酚能够快速发生光化学反应,通过产物分析发现其主要产物为通过光致脱溴氯代过程产生的2,4-二溴-6-氯苯酚,并且该产物随2,4,6-三溴苯酚初始浓度、Cl-浓度、Fe(Ⅲ)浓度的增大及溶液pH值的降低而增加.以明亮发光杆菌为受试生物的毒理学实验表明,2,4,6-三溴苯酚在海水中光化学的前期,系统的毒性效应增强,而毒性的增加可能主要由光致氯代过程导致.
  • Abstract:Organic bromophenol pollutants (BPs) are widely present in aquatic environment, especially in marine environment. They can be formed through a variety of natural processes in addition to anthropogenic pollution. In this study, 2,4,6-tribromophenol (2,4,6-TBP) was chosen to investigate the photochemical transformation of BPs in natural/artificial seawater under simulated sunlight (Xe lamp, λ> 290 nm). The effects of initial concentration of 2,4,6-TBP, Cl-, Fe(Ⅲ) and pH on the photochemical process of 2,4,6-TBP were also studied. The results showed that photochlorination was the main photochemical transformation process of 2,4,6-TBP in seawater under simulated sunlight. Meanwhile, the photo-formation of the main product 2,4-dibromo-6-chlorophenol was enhanced by increasing initial concentrations of 2,4,6-TBP, Cl- and Fe(Ⅲ), as well as under lower pH. Besides, results of toxicity evaluation performed with photobacterium phosphoreum indicated that the toxicity of seawater spiked with 2,4,6-TBP significantly increased in early irradiation period, which might be ascribed to the chlorination of 2,4,6-TBP.

  • 摘要点击次数: 151 全文下载次数: 313