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首页> 外文期刊>RSC Advances >Contamination assessment, source apportionment and health risk assessment of heavy metals in paddy soils of Jiulong River Basin, Southeast China
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Contamination assessment, source apportionment and health risk assessment of heavy metals in paddy soils of Jiulong River Basin, Southeast China

机译：九龙江流域水稻土中重金属的污染评估，源解析和健康风险评估

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To trace the sources and evaluate the health risks of heavy metals in paddy soils of Jiulong River Basin, seventy-one samples of paddy soils were collected in July 2017. The heavy metals contents were determined using inductively coupled plasma mass spectrometry (ICP-MS) and atomic fluorescence spectrophotometry (AFS). The geo-accumulation index ( I _(geo) ) and potential ecological risk index (RI) methods were applied to evaluate the contamination of heavy metals, principal component analysis (PCA) and absolute principal component scores-multiple linear regression (APCS-MLR) were applied to trace the sources, and dose–response model was applied to assess the health risks to the human body. The results indicated that the paddy soils were moderately to heavily polluted by Cd and slightly polluted by Hg, Pb, As and Zn. Heavy metals in paddy soils presented considerable to high potential ecological risk, mostly contributed by Cd and Hg with contribution rates of 59.4% and 26.2%, respectively. The heavy metals contaminating paddy soils were derived from natural sources, agricultural activities, industrial discharge, coal combustion and unidentified sources, with source contribution rates of 31.37%, 24.87%, 19.65%, 18.05% and 6.06%, respectively. The heavy metals in paddy soils presented carcinogenic risks which humans can tolerate and no non-carcinogenic risks. The total non-carcinogenic risks mainly derived from agricultural activities and coal combustion, with contribution rates of 62.16% and 20.21%, respectively, while the total carcinogenic risks mainly derived from natural sources and industrial discharge, with contribution rates of 51.17% and 18.98%, respectively.
机译：为了追踪九龙江流域稻田土壤中重金属的来源并评估其健康风险，2017年7月收集了71个稻田土壤样品。使用电感耦合等离子体质谱法（ICP-MS）测定了重金属含量和原子荧光分光光度法（AFS）。应用地质累积指数（I _（geo））和潜在生态风险指数（RI）方法评估重金属的污染，主成分分析（PCA）和绝对主成分评分-多元线性回归（APCS-MLR） ）被用来追踪来源，剂量-反应模型被用来评估对人体健康的危害。结果表明，水稻土受到镉的中度至重度污染，而汞，铅，砷和锌的污染程度为轻度。稻田土壤中的重金属具有相当高的潜在生态风险，主要由镉和汞贡献，贡献率分别为59.4％和26.2％。污染稻田的重金属来自自然资源，农业活动，工业排放，煤炭燃烧和不明来源，污染源贡献率分别为31.37％，24.87％，19.65％，18.05％和6.06％。稻田土壤中的重金属具有致癌性，人类可以忍受，并且没有非致癌性。非致癌风险总额主要来自农业活动和燃煤，贡献率分别为62.16％和20.21％，而致癌风险总额主要来自自然资源和工业排放，贡献率分别为51.17％和18.98％。 ， 分别。

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