摘要
采集煤矸石烧结砖厂隧道窑废气热交换器内壁的凝结物,利用XRF、XRD、IR、DTA-TG、SEM、EDS、ICP-MS和AFS等方法进行了研究。结果表明:凝结物主要为水合硫酸亚铁和水合硫酸铁,S含量为119.2 mg/g,且Se、As、Pb等微量元素在凝结物中富集。与煤矸石原料相比,凝结物中Se的富集程度最高,含量达到了0.637 mg/g,相对富集因子为467.52;S、Tl、Mo、As、Pb的相对富集因子从57.05依次减小到6.18,F及亲硫元素Sb、Cd、Zn、Ni、Cu、Co富集程度较低;Sr、Th、Be、Ba、U、V、Cr的相对富集因子小于0.5,显示在烧结砖制备过程中的挥发性很低。
Condensates were collected from the inner wall of the waste gas heat exchanger of the coal gangue sintered brick plant. The condensate samples were investigated by XRF, XRD, IR, DTA-TG, SEM, EDS, ICP-MS and AFS. The results indicate that the condensate is mainly composed of ferrous sulfate hydration and ferric sulfate hydration, with the content of S being 119. 2 mg/g and the enrichment of Se, As, Pb, etc. Compared with the elements in coal gangue, Se exhibits the highest enrichment level in condensate, as the content is 0. 637 mg/g and the relative enrichment factor （REF） reaches 467.52. The REF of S, T1, Mo, As and Pb in condensate decreases successively from 57.05 to 6. 18. F and some sulfophile elements, such as Sb, Cd, Zn, Ni, Cu and Co, present low enrichment level. The REFs ofSr, Th, Be, Ba, U, V and Cr are smaller than 0. 5, indicating the volatility of these elements are very low during the preparation process of the sintered brick.
出处
《环境工程》
CAS
CSCD
北大核心
2013年第1期77-80,共4页
Environmental Engineering
基金
国家自然科学基金(40872102)
关键词
煤矸石
烧结砖
废气凝结物
有害元素富集
coal gangue
sintered brick
waste gas condensate
hazardous elements enrichment
