Acid transformation of bauxite residue: Conversion of its alkaline characteristics

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• 作者：Xiangfeng Kong^a ; Meng Li^a ; Shengguo Xue^a ; ^{sgxue@csu.edu.cn} ; ^{sgxue70@hotmail.com} ; William Hartley^b ; Chengrong Chen^c ; Chuan Wu^a ; Xiaofei Li^a ; Yiwei Li^a
• 关键词：BR ; bauxite residue ; TBR ; transformed bauxite residue ; HBR ; bauxite residue transformed by hydrochloric acid ; HGBR ; bauxite residue transformed by hydrochloric acid and gypsum ; SBR ; bauxite residue transformed by sulfuric acid ; SGBR ; bauxite residue transformed by sulfuric acid and gypsum ; CBR ; bauxite residue transformed by citric acid ; CGBR ; bauxite residue transformed by citric and gypsum
• 刊名：Journal of Hazardous Materials
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：324
• 期：part_PB
• 页码：382-390
• 全文大小：2440 K
• 卷排序：324

文摘

Speciation and transformation of solid and soluble alkalinities were investigated. SEM, NEXAFS, and STXM were used to observe particle morphology and alkaline Na speciation and distribution. Gypsum combination promoted leaching of Na-bearing solids and the replacement of exchangeable Na. The use of organic citric acid to transform bauxite residue alkalinity.