University Joint Laboratory of Guangdong Province, Hong Kong and Macao Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
State Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Guangzhou 510655, China.
Sci Total Environ. 2022 Dec 20;853:158623. doi: 10.1016/j.scitotenv.2022.158623. Epub 2022 Sep 8.
Organophosphate esters (OPEs) are well-known persistent organic pollutants with their ubiquitous environmental presence and adverse ecological and human health impacts. To study the transport and fate of OPEs in a subtropical environment, nine OPE compounds were analyzed in the gas phase (air samples), dissolved phase (water samples), and plankton samples collected over one year from or in the vicinity of an urban lake in Guangzhou, South China. The mean concentrations of ∑OPEs were 2.93 ± 1.68 ng/m in the air, 455 ± 236 ng/L in the dissolved phase, 81.3 ± 41.2 ng/L in phytoplankton, and 4.79 ± 1.94 ng/L in zooplankton. Although the compositional profiles of OPEs varied among different media, tris (1-chloro-2-propyl) phosphate (TCPP) was the predominant OPE in most samples. Less hydrophobic OPEs such as TCPP and tris (2-chloroethyl) phosphate (TCEP) had lower bioaccumulation potential in the lake. The biological pump export played an important role in eliminating OPEs from the surface water, with fluxes ranging from 30.5 to 361 ng/m/d. The more phytoplankton biomass in surface water, the greater the role of the biological pump. The fugacity fractions and air-water exchange fluxes suggested that TCPP and tris (1,3-dichloro-2-propyl) phosphate (TDCP) would enter the urban lake by gaseous deposition. Nevertheless, the lake acted as an important "secondary source" for TCEP and triphenyl phosphate (TPhP). The bio-pump might influence the air-water exchange processes of OPEs.
有机磷酸酯（OPEs）是众所周知的持久性有机污染物，它们在环境中普遍存在，对生态和人类健康有不利影响。为了研究有机磷酸酯在亚热带环境中的迁移和归宿，我们在中国南方广州市的一个城市湖泊及其周边地区，采集了一年来的空气样品（气相）、水样（溶解相）和浮游生物样本，共分析了 9 种有机磷酸酯化合物。空气中∑OPEs 的平均浓度为 2.93±1.68ng/m，溶解相中为 455±236ng/L，浮游植物中为 81.3±41.2ng/L，浮游动物中为 4.79±1.94ng/L。尽管不同介质中 OPEs 的组成谱有所不同，但磷酸三（1-氯-2-丙基）酯（TCPP）是大多数样品中的主要 OPE。TCPP 和磷酸三（2-氯乙基）酯（TCEP）等疏水性较弱的 OPE 在湖中具有较低的生物累积潜力。生物泵的输出对消除湖泊表层水中的 OPEs 起着重要作用，通量范围为 30.5-361ng/m/d。表层水中浮游植物生物量越大，生物泵的作用越大。逸度分数和气-水交换通量表明，TCPP 和磷酸三（1,3-二氯-2-丙基）酯（TDCP）将通过气态沉积进入城市湖泊。然而，该湖泊是 TCEP 和三苯基磷酸酯（TPhP）的重要“二次源”。生物泵可能会影响 OPEs 的气-水交换过程。
