摘要
研究了江苏省苏州吴中区农田土壤中持久性有毒污染物(PTS),包括六六六(HCHs)、滴滴涕(DDTs)、多氯联苯(PCBs)和多环芳烃(PAHs)的现状。土壤样品用微波萃取后分别用GC、GC/MS和HPLC方法进行分析。结果表明,HCHs、DDTs、PCBs和PAHs的浓度分别在<0.10μg/kg^916μg/kg、<0.10μg/kg^113μg/kg、5.53μg/kg^22.4μg/kg和3.40μg/kg^36.6μg/kg。HCHs和DDTs的含量与23年前比,已有显著降低;PCBs和PAHs的毒性效应评估处于低水平。β-HCH、PCB28以及4环、5环和6环的PAHs检出率较高,4环和5环的PAHs含量之间还具有较好的相关性。总体而言,吴中区农田土壤中的上述污染物含量较低,但具有较长农耕历史的地区污染情况仍值得关注。
Contamination status of persistent toxic substances （PTS） including HCHs, DDTs, PCBs and PAHs was studied in agricultural soil of Wuzhong District of Suzhou, Jiangsu Province. The soil was analyzed by GC, GC/MS and HPLC coupled with microwave extraction. Results showed that the concentrations of HCHs, DDTs, PCBs and PAHs ranged from 〈0.10-9i6μg/kg, 〈0.10-133μg/kg, 5.53-22.4μg/kg and 3.40-36.6μg/kg respectively. Compared with data 23 years ago, concentrations of HCHs and DDTs had significantly decreased. None of soil PCBs and PAHs concentration suggested a serious biological threat in investigated area. β- HCH, PCB28 and PAHs with 4, 5 and 6 rings were frequently detected. Significant relationships were found between the concentration of PAHs with 4 rings and with 5 rings. Levels of pollutants in soil of the area were relatively low, but cautions should be taken for areas with long agricultural history.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第12期113-116,124,共5页
Environmental Science & Technology
基金
国土资源部中国地质调查局与江苏省人民政府合作项目--“江苏省国土生态地球化学调查”合作研究专题资助(20031230008
200312300009-03)
