| 修复达标土壤回填对地下水环境影响的层次化评估方法应用研究 |
| 摘要点击 2482 全文点击 1263 投稿时间：2012-05-23 修订日期：2012-07-24 |
| 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 达标修复 土壤回填 地下水 影响评估 层次化方法 |
| 英文关键词 remediation meeting targets soil backfilling groundwater impact assessment tiered approach |
| 作者 | 单位 | E-mail | | 钟茂生 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037 | zzmmss1986@126.com | | 姜林 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037 | jl-iep@vip.163.com | | 姚珏君 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037 | | | 樊艳玲 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037 | | | 夏天翔 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037 | | | 李婷婷 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037
首都师范大学资源环境与旅游学院,北京 100048 | | | 田美影 | 北京市环境保护科学研究院,北京 100037
国家城市环境污染控制工程技术研究中心,北京 100037
污染场地风险模拟与修复北京市重点实验室,北京 100037
首都师范大学资源环境与旅游学院,北京 100048 | |
|
| 中文摘要 |
| 以含1,2-二氯乙烷等10种有机物污染土壤异位修复后回填为例,采用层次化方法评估将按原厂址健康风险评价确定的修复目标进行达标修复后的土壤回填对回填区地下水下游700 m处饮用水井水质的影响. 第一层次预测结果显示8种污染物在回填土层淋溶液中的浓度将超过评价标准,可能对目标水井水质造成污染. 考虑回填区非饱和带土壤的吸附截留进行第二层次评价的结果显示,到达回填区地下水水面处浓度依然超过评价标准的污染物降低至6种,不能排除对目标水井的水质影响. 进一步考虑地下水混合稀释进行第三层次评估的结果显示,经地下水混合稀释后,超过评价标准的污染物降低至4种. 最后,考虑饱和带吸附截留作用进行第四层次评估的结果显示,目标水井中超过评估标准的污染物仅1种. 由此可见,随着评估层次的不断深入,虽然所需开展的工作及获取的场地参数增加,但是污染物预测浓度更接近目标预测点的浓度,需调整修复目标的污染物数量逐渐减少,污染防治成本将逐渐降低. |
| 英文摘要 |
| The tiered approach for assessing the impact of backfilling treated contaminated soil on groundwater was presented in details with a case study. The soil was contaminated by 1,2-dicholorenthane and 9 other organic pollutants and had been remediated before backfilling to meet the pre-set remediation goals based on health risk assessment. The results from tiered Ⅰ assessment indicate that the concentrations of 8 contaminants in the leachate of the backfilling soil layer would exceed the assessment standards probably leading to groundwater contamination. However, the results from tiered Ⅱ assessment, in which the adsorption and retardation of vadose zone soil was taken into account and the concentrations of pollutants reaching the groundwater table were predicated, reveal that only the concentrations of 6 contaminants would exceed the assessment standards. Further, taking the dilution and mixing of the groundwater into consideration, tiered Ⅲ assessment was adopted and the results reveal that only 4 contaminants were beyond the standards. Finally, tiered Ⅳ assessment, aiming at predicting the concentration at the target well downstream, was carried out by considering the retardation of contaminants in saturated layer, and the results indicate only 1 pollutant was above the assessment standard. Therefore, it can be seen that the predicted concentrations of the target pollutants at advanced assessment levels will be closer to those at the target drinking water well and the amount of contaminants whose initially-set remediation goals need to be modified will decrease correspondingly, indicating the reduction in pollution prevention cost, although more efforts should be made and more field data should be collected to implement the advance assessment level. |
|
|
|
