Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
Environ Sci Pollut Res Int. 2021 Aug;28(31):42444-42457. doi: 10.1007/s11356-021-13717-9. Epub 2021 Apr 4.
One hundred two semivolatile organic compounds (SVOCs), including 20 organochlorine pesticides (OCPs) and 12 organophosphorus pesticides (OPPs), were determined in the main rivers of Shenzhen, China. As a result, p,p'-dichlorodiphenyldichloroethane (DDD), aldrin, and benzoepin sulfate were the main OCPs detected in surface water, and p,p'-DDD, heptachlor, and endrin aldehyde were the main compounds in sediment. In addition, diazinon was the most frequent OPP detected in both water and sediment. At most sites, SVOCs were at similar concentration levels in 2017 and 2018. Compared with other areas, diazinon and malathion had comparative high concentrations in Maozhou River in this study. Analyzed from the SVOCs concentrations in water and sediment, p,p'-DDD was from the quick degradation of p,p'-dichlorodiphenyltrichloroethane (DDT), and no recent DDT was input around the investigated area. Besides, the interrelationships among these pollutants were calculated, revealing that OPPs were mainly from the chronically cumulative content, rather than the directly transferring from surface water to sediment. According to the risk assessment, the occurrence of p,p'-DDD and p,p'-DDT affected the aquatic community. All in all, further investigations on the occurrence and source of these pollutants are still needed to avoid the potential risk for human beings living around the contaminated environment.
在中国深圳的主要河流中，测定了 102 种半挥发性有机化合物（SVOCs），包括 20 种有机氯农药（OCPs）和 12 种有机磷农药（OPPs）。结果表明，水中主要的 OCPs 为 p,p'-二氯二苯二氯乙烷（DDD）、艾氏剂和苯并噻嗪硫酸盐，而沉积物中的主要化合物为 p,p'-DDD、七氯和异狄氏剂醛。此外，水中和沉积物中最常见的 OPP 是敌百虫。在大多数采样点，SVOCs 的浓度在 2017 年和 2018 年相似。与其他地区相比，在本研究中，毛洲河的敌百虫和马拉硫磷浓度相对较高。从水中和沉积物中 SVOCs 的浓度分析，p,p'-DDD 是由 p,p'-二氯二苯三氯乙烷（DDT）的快速降解产生的，而且在研究区域周围没有最近输入的 DDT。此外，还计算了这些污染物之间的相互关系，结果表明 OPPs 主要来自于长期累积的含量，而不是直接从地表水转移到沉积物中。根据风险评估，p,p'-DDD 和 p,p'-DDT 的出现影响了水生群落。总之，仍需要进一步调查这些污染物的存在和来源，以避免生活在污染环境周围的人类面临潜在风险。
