某化肥厂污染场地土壤和地下水中氨氮分布特征及其非致癌风险评估  被引量:14

Distribution characteristics and non-carcinogenic risk assessment of ammonia nitrogen in the soil and groundwater polluted by a chemical fertilizer contaminated site

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作  者:徐铁兵 刘思言 阎秀兰[2,3] 李鸣凤 XU Tiebing;LIU Siyan;YAN Xiulan;LI Mingfeng(Hebei Provincial Environmental Science Research Institute,Shijiazhuang Hebei 050037;Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101;Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences,Beijing 100101;University of Chinese Academy of Sciences,Beijing 100049;Wuhan University of Bioengineering,Wuhan Hubei 430070)

机构地区:[1]河北省环境科学研究院,河北石家庄050037 [2]中国科学院地理科学与资源研究所,北京100101 [3]中国科学院陆地表层格局与模拟重点实验室,北京100101 [4]中国科学院大学,北京100049 [5]武汉生物工程学院,湖北武汉430070

出  处:《环境污染与防治》2021年第2期211-216,共6页Environmental Pollution & Control

基  金:国家自然科学基金资助项目(No.41571309)。

摘  要:研究了生产历史长达43年的华北地区已停产的某化肥厂污染场地土壤和地下水中氨氮分布特征及其非致癌风险。结果表明:该场地内土壤氨氮质量浓度为0.29~7020.00 mg/kg,污染主要集中在碳化工房和变换、脱硫工房等核心生产区,以及发生过液氨泄漏事故的南部空地区域;氨氮浓度总体随土壤深度的增加呈现先上升后降低的趋势,深度为6.00~20.00 m的区域是污染高值区;地下水中氨氮浓度分布以核心生产区的碳化工房区域为中心向四周扩散,最高质量浓度达到859.40 mg/L,与土壤氨氮分布特征基本一致;作为居住用地,该场地地下水中氨氮的非致癌危害商处于可接受风险范围内,但表层土壤(0~6.00 m)和下层土壤(6.00~17.00 m)中氨氮的非致癌危害商均超出人体健康可接受范围,应采取一定的管理措施,阻断土壤氨氮进入空气和地下水。The distribution characteristics and non-carcinogenic risk assessment of ammonia nitrogen in the soil and groundwater were studied in a closed chemical fertilizer contaminated site with 43 years production history.Results showed that the mass concentrations of ammonia nitrogen in soil were 0.29-7020.00 mg/kg,and the pollution areas were in the core region of production such as the carbonization zone and the transformation and desulfurization zone,as well as the southern opening region where liquid ammonia leakage accident had occurred.The vertical distribution of ammonia nitrogen in the soil showed a trend of gradually increasing and then decreasing with the increase of depth.The profile with high pollution was at 6.00-20.00 m.Ammonia nitrogen distribution characteristics in groundwater were similar to that in soil,which centered at the carbonization zone,and spread around with the highest mass concentration of 859.40 mg/L.As residential land use,the non-carcinogenic quotient of ammonia nitrogen in groundwater was at an acceptable level.However,those in both top soil(0-6.00 m)and bottom soil(6.00-17.00 m)were over the acceptable range of human health.Therefore,it must take measures to prevent ammonia nitrogen to emit from soil to air and groundwater.

关 键 词:化肥厂污染场地 土壤 地下水 氨氮 分布特征 非致癌风险 

分 类 号:X53[环境科学与工程—环境工程] X523X820.4

 

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