从西北干旱的乌鲁木齐收集了68个城市地面灰尘和土壤配对样品以及4个大气灰尘样品。分析了这些样品中的13种有机磷酸酯(OPEs)的特性,来源,生物可达性,和OPEs的健康风险。所研究的OPEs在城市地表灰尘中被广泛检测到,土壤,和灰尘,Σ13OPEs(总浓度为13OPEs)为1362、164.0和1367ng/g,分别,以三(2-氯乙基)磷酸盐(TCEP)为主,三(2-氯异丙基)磷酸酯(TTiPP),磷酸三(1,3-二氯异丙基)酯(TDCiPP)和磷酸三(2-丁氧基乙基)酯(TBOEP),TBOEP和磷酸三(2-乙基己基)酯(TEHP),和TCEP,TTiPP,TBOEP,磷酸三苯酯和TEHP,分别。地表灰尘和城市土壤的低频和高频磁化率可能表明其中OPEs的污染。在西部发现了地表灰尘和城市土壤中的Σ13OPEs水平升高,南,在乌鲁木齐市的东北部。受降尘约束的13个OPEs的总沉积通量范围为86.5至143ng/m2/天,平均值为105ng/m2/天。表面灰尘和城市土壤中的OPEs与含有OPEs的室内和室外产品的排放有关,大气的干沉降和湿沉降,以及交通的排放。磷酸三甲酯,磷酸三乙酯,磷酸三丙酯,磷酸三异丁酯,TCEP,TTiPP,TDCiPP,TBOEP在地表灰尘和城市土壤中具有较高的生物可达性。OPEs的生物可及性主要受OPEs理化性质的影响。人类暴露于地表灰尘和城市土壤中的OPEs的非癌症和癌症风险相对较低或可以忽略不计。当前的研究结果可为预防和控制OPEs的污染和风险提供科学支持。
Sixty-eight paired samples of urban surface dust and soil as well as four samples of atmospheric dustfall were collected from the arid city of Urumqi in Northwest China. Thirteen organophosphate esters (OPEs) in these samples were analyzed for the characteristics, sources, bio-accessibility, and health risks of OPEs. The studied OPEs were widely detected in the urban surface dust, soil, and dustfall, with Σ13OPEs (total concentration of 13 OPEs) of 1362, 164.0, and 1367 ng/g, respectively, dominated by tris(2-chloroethyle) phosphate (TCEP), tri(2-chloroisopropyl) phosphate (TCiPP), tri(1, 3-dichloroisopropyl) phosphate (TDCiPP) and tris(2-butoxyethyl) phosphate (TBOEP), TBOEP and tri(2-ethylhexyl) phosphate (TEHP), and TCEP, TCiPP, TBOEP, triphenyl phosphate and TEHP, respectively. The low and high frequency magnetic susceptibility of surface dust and urban soil might indicate the pollution of OPEs in them. Elevated levels of the Σ13OPEs in the surface dust and urban soil were found in the west, south, and northeast of Urumqi city. The total deposition flux of dustfall-bound 13 OPEs ranged from 86.5 to 143 ng/m2/day, with a mean of 105 ng/m2/day. OPEs in the surface dust and urban soil were associated with the emissions of indoor and outdoor products containing OPEs, the dry and wet deposition of atmosphere, and the emissions of traffic. Trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tri-isobutyl phosphate, TCEP, TCiPP, TDCiPP, and TBOEP in surface dust and urban soil had relatively high bio-accessibility. The bio-accessibility of OPEs was mainly affected by the physio-chemical properties of OPEs. The non-cancer and cancer risks of human exposure to OPEs in surface dust and urban soil were relatively low or negligible. The current research results may provide scientific supports for prevention and control of pollution and risks of OPEs.