摘要
多数工业企业遗留场地存在重金属污染问题.以天津市某重金属镍污染场地为对象开展修复目标值研究工作.首先依据《污染场地风险评估技术导则》评估场地重金属镍污染对人体健康可能造成的风险,计算场地风险控制值为94,mg/kg,涉及修复土方量约2.4万m^3.但导则的制定多基于污染因子保守性假设,因此计算所得风险控制值相对保守.若直接以计算所得风险控制目标作为修复目标值,会造成修复土方量较大.利用人体可给性测试结果修正导则计算风险控制值后该值提升至491,mg/kg,需修复土方减少到0.3万m^3.由此可见,该方法可在避免对人体造成危害的同时合理控制修复土方量,有效降低修复成本.
Nowadays, there are many heavy metal pollution problems at the locations of most industrial enterprises. A nickel contaminated site was used to carry out a repair research. According to the national guideline, the risk control value of this site is 94,mg/kg. About 24000,cubic meters of soil needs to be remediated. However, the guideline is quiteconservative, so the calculation of risk control value is conservative, too. If the calculated objective control value on the spot is taken as the target value of remediation, more earth needs to be remediated. Through the human bioaccessibility experi-ment, the risk control value was up to 491,mg/kg and the earthwork was reduced to 3000 cubic meters. Verifying therisk control value can not only avoid harm to human health, but also provide a reasonable remediation control value to help re-duce the cost of remediation.
出处
《天津科技大学学报》
CAS
北大核心
2017年第1期52-55,67,共5页
Journal of Tianjin University of Science & Technology
关键词
镍
人体可给性
风险控制值
nickel
human bioaccessibility
risk control value
