| 我国焦化场地多环芳烃和重金属分布情况及生态风险评价 |
| 摘要点击 2275 全文点击 617 投稿时间：2021-05-24 修订日期：2021-07-26 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 焦化场地 土壤 重金属 多环芳烃(PAHs) 生态风险 |
| 英文关键词 coking site soil heavy metals polycyclic aromatic hydrocarbons(PAHs) ecological risks |
|
| 中文摘要 |
| 焦化是我国的重工行业，其生产过程中对生态环境造成的严重影响不容忽视.通过收集我国各个地区焦化行业场地的最新污染数据，试图从全国范围展开分析，反映我国焦化行业场地土壤的污染状况.运用质量基准法和毒性当量法对焦化土壤16种多环芳烃的生态风险进行了评价分析，运用地累积指数法和潜在生态风险评价法对8种重金属进行评价分析.结果表明，质量基准法计算我国各地区焦化场地土壤的M-ERM-Q值都大于1.51，为高生态风险，其中北方地区风险等级最高.根据荷兰土壤质量标准，毒性当量法表明，10种多环芳烃的总毒性当量均大于荷兰标准，其土壤呈现污染状态，且北方地区Σ10TEQ远大于荷兰标准，这与质量标准法的评估结果一致；地累积指数法得出Cd和Hg为焦化场地主要污染物，其余元素危害相对较小.潜在生态风险评价表明，各地区焦化场地污染较为严重，山西和河北地区焦化场地的重金属危害程度最为严重，达到重度污染水平. |
| 英文摘要 |
| Coking is a heavy industry in China, and its serious impact on the ecological environment in the production process cannot be ignored. This study collected the latest pollution data of the coking industry sites in various regions throughout China, reflecting the soil pollution status of the coking industry sites in the country as a whole. The ecological risks of the 16 polycyclic aromatic hydrocarbons (PAHs) in coke soils were evaluated and analyzed using the quality benchmark method and the toxicity equivalent method. The "Background Value of Soil Elements in China" was used as the reference standard, and the geo-accumulation index method and the potential ecological risk assessment method were used to evaluate the ecological risks. The ecological risks of various heavy metals were evaluated and analyzed. The results show that the M-ERM-Q value calculated by the quality benchmark method for coking site soils in all regions of the country was greater than 1.51, which indicates a high ecological risk, and the northern region had the highest risk level. According to the Dutch soil quality standard, the toxicity equivalent method revealed that the total toxicity equivalent concentration of 10 PAHs was greater than the Dutch standard, and thus the soil is in a polluted state. The Σ10TEQ in the northern region was much larger than the Dutch standard, which is consistent with the evaluation result of the quality standard method, which showed that Cd and Hg were the main pollutants in the coking site, and the other elements were relatively less harmful. The evaluation of potential ecological risks showed that the pollution of coking sites in northern regions is relatively serious, especially in the Shanxi and Hebei areas where the soil heavy metal damage was the most serious, reaching a strong level. |
|
|
|
