广东省污染土壤水泥窑协同处置技术应用研究

Survey Research on Co-processing of Contaminated Soil in Cement Kiln in Guangdong Province

水泥窑协同处置技术可快速将污染土壤从场地移除,缩短修复工期,消除环境风险,其作为“资源化、无害化”的典范得到广泛应用。通过数据分析,2016~2022年,广东省采用水泥窑协同处置技术的修复地块数量经历了“缓慢上升-下降-快速上升-急剧下降”的变化历程。广东省共有4个地级市的污染地块修复采用了水泥窑协同处置技术,其中涉及的污染地块数量和污染土壤方量最多的为广州市,其次为惠州市、深圳市和中山市。水泥窑可以安全协同处置25种不同的污染物,重金属及无机物污染土壤方量占比最大,为91.89%。广东省水泥生产企业重金属和无机物污染土壤以及重金属有机物复合污染土壤的掺烧比为2%~10%,有机物污染土壤的掺烧比约为5%。2022年广东省61.9%的地级市有水泥生产企业分布,广东省仍拥有巨大的协同处置污染土壤的水泥窑产能潜力。

The cement kiln co-processing can quickly remove contaminated soil from the site,shorten the restoration period,and eliminate environmental risks,which,as a model of“resource utilization and detoxification”,has been widely applied.Through statistical data analysis,from 2016 to 2022,the number of contaminated sites in Guangdong Province using cement kiln co-processing technology experienced a process of“slow increase-decrease-rapid increase-sharp decrease”.There are 4 Prefecture-level cities in Guangdong Province that have adopted the cement kiln co-processing for the remediation of contaminated soil,among which Guangzhou has the largest number of contaminated sites and treated contaminated soil volume,followed by Huizhou,Shenzhen and Zhongshan.Cement kiln co-processing can safely dispose of 25 different pollutants.Heavy metals and inorganic compounds contaminated soil accounts for the largest proportion,which is 91.89%.The feed rate of heavy metal and inorganic compounds contaminated soil and combined pollutants contaminated soil adopted by cement enterprises in Guangdong Province ranges from 2%to 10%,and the feed rate of organic compounds contaminated soil is about 5%.In 2022,61.9%of Prefecture-level city in Guangdong Province have cement production enterprises,and there is still huge potential for co-processing of contaminated soil in cement kiln in Guangdong Province.