CAJ | 학술논문

分别以我国某地2种含砷废物(污泥和废渣)为研究对象,用EA NEN 7371实验方法分析其不同资源化产品(烧制砖、免烧砖和含砷水泥等)中As的有效量浸出特性,从环境风险的角度探讨了含砷废物资源化利用的可行性. 结果显示:含砷污泥进行烧砖处置后,其产品中As的有效量浸出率从15%左右升至60%～70%;含砷废渣与水泥进行混合粉磨共处置后,含砷水泥产品中As的有效量浸出率从60%～70%降至4%以下;含砷废渣制成免烧砖后,As的有效量浸出率从60%～70%降至10%左右. 表明含砷污泥不宜进行烧砖处置;而含砷废渣可根据含砷量,在控制掺加比例的条件下与水泥熟料共处置生产混合水泥或作为原材料生产免烧砖.
분별이아국모지2충함신폐물(오니화폐사)위연구대상,용EA NEN 7371실험방법분석기불동자원화산품(소제전、면소전화함신수니등)중As적유효량침출특성,종배경풍험적각도탐토료함신폐물자원화이용적가행성. 결과현시:함신오니진행소전처치후,기산품중As적유효량침출솔종15%좌우승지60%～70%;함신폐사여수니진행혼합분마공처치후,함신수니산품중As적유효량침출솔종60%～70%강지4%이하;함신폐사제성면소전후,As적유효량침출솔종60%～70%강지10%좌우. 표명함신오니불의진행소전처치;이함신폐사가근거함신량,재공제참가비례적조건하여수니숙료공처치생산혼합수니혹작위원재료생산면소전.
This experiment used two types of arsenic-containing waste (sludge and residue) as raw materials to make resource recovery products (bricks, baking-free bricks and mix-cement), investigated the availability leaching of As using the EA NEN 7371 method, and discussed their reuse feasibility from an environmental risk perspective. The results show that the availability leaching rate of As in bricks made with a mixture of arsenic-containing sludge increased from about 15% to 60%-70%, while the availability leaching rate of As in arsenic-containing cement made with the mixture of cement and arsenic-containing residue decreased from 60%-70% to below 4% after grinding disposal. The availability leaching rate of As in baking-free bricks made with the arsenic residue reduced from 60%-70% to about 10%. Therefore, arsenic-containing sludge should not be utilized to make bricks, and the arsenic-containing residue can be co-processed in cement grinding plants or baking-free bricks manufacture under strict control of the mixing ratios.