Ho-Young Lee, Sung-Deuk Choi, Min-Kyu Park, Yoon-Se Lee, Chul-Su Kim, Cheol-Hee Kim, Lim-Seok Chang
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引用次数: 0

摘要

来自亚洲大陆的跨境空气污染物对韩国的影响一直是人们关注的焦点。尽管有机氯杀虫剂(OCPs)已被禁用几十年,但在韩国环境中仍能检测到它们。然而,有关有机氯农药在韩国(尤其是背景地区)的远距离大气迁移(LRAT)的研究仍然有限。本研究调查了朝鲜半岛西海岸附近的一个背景地点--德积岛的 OCPs 大气水平、来源和行为。24 种 OCPs 的总浓度介于 53.6 至 325 皮克/立方米之间,低于韩国国家持久性有机污染物监测网络报告的水平,与东北亚其他背景地区的水平相似。六氯代苯(62.7 皮克/立方米,45%)和五氯苯(46.6 皮克/立方米,33%)是气相中最主要的 OCPs,而滴滴涕则是颗粒相中最主要的 OCPs(1.65 皮克/立方米,44%)。气态 OCPs 主要受过去使用和再排放的影响,而持续排放和 LRAT 是微粒 OCPs 的主要来源。灭蚁灵的持续检测为 LRAT 提供了有力证据。此外,相关性分析和 Clausius-Clapeyron 方程表明,滴滴涕受到 LRAT 的显著影响。浓度加权轨迹图显示,华东、华北和东北地区是气态 OCPs 的主要来源地区,主要由再排放驱动;而颗粒 OCPs 的主要来源地区是北京、河北、天津和山东。大多数 OCPs(五氯苯除外)的空气/土壤逸散分量显示为平衡或净沉降,表明 OCPs 受过去使用和 LRAT 影响的动态环境行为。本研究提供了 OCPs 对韩国的 LRAT 证据,表明了跨境污染的重大影响。这些结果突显了在东北亚受体地点对历史上和目前使用的农药进行持续监测的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Long-range atmospheric transport of organochlorine pesticides from China to South Korea: Evidence from Deokjeok Island.

The influence of transboundary air pollutants originating from the Asian continent on South Korea has been a major concern. Although organochlorine pesticides (OCPs) have been banned for several decades, they continue to be detected in the Korean environment. However, studies on the long-range atmospheric transport (LRAT) of OCPs in South Korea, particularly in background areas, remain limited. This study investigated the atmospheric levels, sources, and behavior of OCPs at Deokjeok Island, a background site near the west coast of the Korean Peninsula. Total concentrations of 24 OCPs ranged from 53.6 to 325 pg/m3, which are lower than those reported by the national POPs monitoring network of South Korea and similar to levels found in other background regions in Northeast Asia. HCB (62.7 pg/m3, 45%) and PeCB (46.6 pg/m3, 33%) were the most dominant OCPs in the gaseous phase, whereas DDTs were predominant (1.65 pg/m3, 44%) in the particulate phase. Gaseous OCPs were strongly influenced by past use and re-emissions, while ongoing emissions and LRAT were the major sources of particulate OCPs. The consistent detection of mirex provides strong evidence of LRAT. In addition, correlation analysis and the Clausius-Clapeyron equation indicated that DDTs were significantly influenced by LRAT. Concentration-weighted trajectory maps identified East, North, and Northeast China as the major source regions for gaseous OCPs, driven by re-emissions, while the primary source areas for particulate OCPs were Beijing, Hebei, Tianjin, and Shandong. Air/soil fugacity fractions showed equilibrium or net deposition for most OCPs (except PeCB), indicating the dynamic environmental behavior of OCPs influenced by past use and LRAT. This study provides evidence of LRAT of OCPs to South Korea, demonstrating the significant impact of transboundary pollution. These results highlight the importance of ongoing monitoring of both historically and currently used pesticides at receptor sites in Northeast Asia.

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