摘要
为分析饮用水处理用废活性炭制作土壤改良剂的可行性,采制深圳市某饮用水处理厂废活性炭样品,经微波消解后利用ICP-MS法测定废炭中Cd、As、Cu、Pb、Cr、Zn和Ni七种重金属含量,采用单项污染指数法和内梅罗综合污染指数法评价废炭的重金属污染水平,并运用地累积指数法和潜在生态风险指数法评价废炭的重金属生态风险。结果表明,废活性炭中七种重金属含量介于0.92~221.99 mg/kg之间,对研究区域生态环境具有影响的重金属元素主要是Cd、Cu和Ni。废活性炭重金属内梅罗综合污染指数为2.34,属于中度污染。其中Cd的单项污染指数最高,达到3.07,属于重度污染。Cu、Ni均可对土壤环境造成中等程度的重金属累积。废活性炭对土壤重金属的综合风险程度较低。该研究结果可以为废炭无害化和资源化利用提供参考。
This paper is concerned with the exploration of the feasibility of making soil conditioner from spent activated carbon.The exploration is done by sampling spent activated carbon from a drinking water treatment plant in Shenzhen;determining the contents of heavy metals, including Cd, As, Cu, Pb, Cr, Zn and Ni, in spent activated carbon by ICP-MS after microwave digestion pretreatment;and thereby identifying the pollution levels and asses the ecological risk of heavy metals in spent activated carbon using methods such as the pollution appraisal index, geo-accumulation index, and potential ecological risk index.The results indicate that spent activated carbon samples have seven heavy metals with the contents ranging from 0.92 to 221.99 mg/kg;the heavy metals found in waste activated carbon have the Nemero comprehensive pollution index of 2.34 and fall under the category of moderate contamination, with Cd having the highest single pollution index of 3.07, classified as a serious contamination;both Cu and Ni could contribute to heavy metal accumulation of a medium degree in soil environment while spent activated carbon has a low-level comprehensive risk of the heavy metals on soil environment;and Cd, Cu and Ni are the potential impact elements for the ecological environment in the study region.The study could provide a reference for the harmless and utilization of spent activated carbon.
出处
《黑龙江科技大学学报》
CAS
2017年第5期569-574,共6页
Journal of Heilongjiang University of Science And Technology
基金
中央高校基本科研业务费资助项目(2009KH10)
关键词
废活性炭
重金属
污染水平
生态风险
spent activated carbon
heavy metals
pollution level
ecological risk
