Qu Chengkai, Albanese Stefano, Li Jiji, Cicchella Domenico, Zuzolo Daniela, Hope David, Cerino Pellegrino, Pizzolante Antonio, Doherty Angela L, Lima Annamaria, De Vivo Benedetto
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China; Department of Earth Sciences, Environment and Resources, University of Naples Federico II, Naples 80125, Italy.
Department of Earth Sciences, Environment and Resources, University of Naples Federico II, Naples 80125, Italy.
Sci Total Environ. 2019 Jul 15;674:159-170. doi: 10.1016/j.scitotenv.2019.04.029. Epub 2019 Apr 4.
This study comprehensively interprets the contamination status of organochlorine pesticides (OCPs) in the soils from Benevento provincial territory, southern Italy, and its implications for environmental health by means of a systematic grid sampling method and geostatistics. The total concentrations of OCPs in the soils ranged from 0.058 to 16.9 ng/g, with a geometric mean (GM) of 0.72 ng/g and an arithmetic mean (AM) of 1.71 ng/g. The levels of OCPs were dominated by p,p'-DDE, p,p'-DDD, HCB, contributing together to 73.5% of the total OCPs. The higher levels of HCB, DDTs, and HCHs found in southwestern, central and east Benevento provincial territory, all occurring adjacent to landfill sites. The residues of OCPs in soil are largely ascribed to their historical use. The OCP inventories in soils of Benevento provincial territory ranged from 0.13 to 4.84 metric tons, with GM = 0.42 metric tons and AM = 0.44 metric tons. The soil is likely to be a sink for DDTs under the influence of regional air transport from pollution hotspots and has the potential to release other chemicals with a high vapor pressure, e.g., HCB, HCHs, and α-Endosulfan. And the mean level of the air-soil exchange flux of HCB, HCHs, and DDTs is estimated to be -1.59, -0.72, and 0.10 ng/m/day respectively. The potential ecological and human health risks caused by OCPs in the soils are deemed essentially negligible in Benevento provincial territory.
本研究采用系统网格采样法和地统计学方法，全面阐释了意大利南部贝内文托省土壤中有机氯农药（OCPs）的污染状况及其对环境健康的影响。土壤中OCPs的总浓度范围为0.058至16.9 ng/g，几何平均值（GM）为0.72 ng/g，算术平均值（AM）为1.71 ng/g。OCPs的含量以p,p'-DDE、p,p'-DDD、六氯苯（HCB）为主，三者合计占总OCPs的73.5%。在贝内文托省西南部、中部和东部地区发现的HCB、滴滴涕（DDTs）和六氯环己烷（HCHs）含量较高，这些区域均紧邻垃圾填埋场。土壤中OCPs的残留主要归因于其历史使用情况。贝内文托省土壤中OCPs的存量范围为0.13至4.84公吨，GM = 0.42公吨，AM = 0.44公吨。在来自污染热点地区的区域空气传输影响下，土壤可能是DDTs的汇，并且有可能释放其他高蒸气压化学品，例如HCB、HCHs和α-硫丹。据估计，HCB、HCHs和DDTs的气-土交换通量平均水平分别为-1.59、-0.72和0.10 ng/m/天。在贝内文托省，土壤中OCPs造成的潜在生态和人类健康风险基本可忽略不计。
