Occurrence of polycyclic aromatic hydrocarbons in groundwater from rural areas in eastern China: Spatial distribution, source apportionment and health cancer risk assessment

Occurrence of polycyclic aromatic hydrocarbons in groundwater from rural areas in eastern China: Spatial distribution, source apportionment and health cancer risk assessment
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中国东部农村地区地下水中多环芳烃的赋存:空间分布、来源解析与健康癌症风险评估

DOI:
10.1016/j.chemosphere.2020.127534
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发表时间:
2020-07
期刊:
影响因子:
8.8
通讯作者:
an Xu
an Xu
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Ming Liang;H;ong Liang;Zhu Rao;D;an Xu

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井水中的多环芳烃(PAHs)污染越来越普遍,特别是在农村地区。小作坊的发展带来了经济增长;然而,由于化石燃料的燃烧,污染程度也急剧增加。缺乏有效的措施来控制环境污染和严格的立法,在这些地区可能会导致更高的多环芳烃排放。本文报道了中国东部农村井水中16种多环芳烃的分布和水平。16种优先监测的多环芳烃总浓度为4 ~ 169 ng/L,算术平均值为38 ± 25 ng/L。山东井水中多环芳烃含量最高,平均浓度为60 ± 48 ng/L。16种多环芳烃的分布总体上呈现出由北向南逐渐减少的趋势。而2环和4环多环芳烃在江苏和河北省的分布较高。多环芳烃的源解析结果表明,该区域多环芳烃的主要来源为燃煤和生物质燃烧,这与当地的实际情况相吻合。计算了健康癌症风险值,结果表明9种非致癌污染物的健康风险系数均小于1,可能不具有负健康风险。然而,对于致癌的多环芳烃,皮肤途径的CR值高于10−6,苯并[a]芘(BaP)和二苯并[a,h]蒽(DbA)的CR值甚至更高(>10−4),表明对儿童和成人的风险很高。
Polycyclic aromatic hydrocarbons (PAHs) pollution in well water has become more widespread, especially in rural areas. The development of small workshops has brought economic growth; however, a sharp increase in the level of pollution due to combustion of fossil fuels has also been observed. A lack of effective measures to control environmental pollution and strict legislation in these regions can contribute to higher PAHs emissions. In the study, the distribution and level of 16 PAHs in well water in rural eastern China were reported. The total concentrations of 16 priority PAHs varied from 4 to 169 ng/L, and an arithmetic mean of 38 ± 25 ng/L. Moreover, the highest PAHs content was found in well water from Shandong Province, and the average concentration was 60 ± 48 ng/L. The distribution of total 16 PAHs illustrated a decreasing trend from north to south. However, the distribution of PAHs with 2-rings and 4-rings was found to be higher in Jiangsu and Hebei province, respectively. The PAHs source identification results showed that the dominant source was coal and biomass combustion, which was consistent with the local conditions. The values of health cancer risks (CRs) were calculated, and that indicated that hazard quotients of nine non-carcinogenic contaminants were lower than one and might not have negative health risks. However, for carcinogenic PAHs, CRs values of the dermal pathway were higher than 10−6, and those for benzo [a]pyrene (BaP) and dibenzo [a, h] anthracene (DbA) were even higher (>10−4), indicating significant high risks to children and adults.
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发表时间: 2017-02
期刊: Human and Ecological Risk Assessment: An International Journal
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