中南大学学报（自然科学版）2011，Vol.42Issue(11)：3262-3269,8.
硫固定法处理重金属废渣制作硫磺建材的研究
Immobilization of heavy-metal containing waste residue using sulfur to make construction materials
摘要
Abstract
Based on the analysis of the leaching toxicity and compressive strength, the sulfuration slag and gypsum slag which were produced during the treatment process of waste acid in a smelter, were used as experimental materials. The optimal conditions for sulfur immobilization were studied. The results show that the leaching rate of sulfuration slag is higher than that of gypsum slag, and the leaching toxicity of zinc and cadmium is 1 547.0 mg/L and 104.4 mg/L, respectively. Increasing of sulfur content and adding of gypsum slag are beneficial to the decrease of leaching toxicity. The concentration of zinc and cadmium in the leachate of the solidified body is 1.74 mg/L and 0.87 mg/L respectively with a pretreatment of sodium sulfide at the concentration of 1 mol/L, which is lower than the identification standards of leaching toxicity for hazardous wastes (GB 5085.3-2007). When the particle size of sulfuration slag is less than 150 um, the gypsum slag adding ratio is 20% and the aggregate adding ratio is 15%, and the compressive strength of solidified body will reach the maximum value as 47.5 Mpa, which reaches the level of C47 concrete strength according to the standard of inspection and assessment of concrete strength (GBJ 107-87).关键词
硫固定法/重金属废渣/浸出毒性/抗压强度Key words
sulfur immobilization/ heavy-metal containing waste residue/ leaching toxicity/ compressive strength分类
资源环境引用本文复制引用
杨少辉,闵小波,柴立元,梁彦杰,蒋万顺..硫固定法处理重金属废渣制作硫磺建材的研究[J].中南大学学报（自然科学版）,2011,42(11):3262-3269,8.基金项目
国家杰出青年科学基金资助项目(50925417) （50925417）
国际科技合作项目(2008NR1181) （2008NR1181）
湖南省科技重大专项(2009FJ1008,2008SK 1002) （2009FJ1008,2008SK 1002）
国家高技术研究发展计划("863"计划)项目(2010AA065203) （"863"计划）
教育部新世纪人才支持计划项目(ncet-10-0840) （ncet-10-0840）
