摘要
以白音华褐煤为原料,碱提分级褐煤腐植酸,制备棕黑腐酸和黄腐酸,容量法测定含量。探讨腐植酸提取率的影响因素,确定最佳实验条件为碱液浓度0.5 mol/L,碱提时间5 h,酸析pH值为2,总腐植酸提取率近50%。红外光谱结果表明,棕黑腐酸和黄腐酸具有芳香族羧酸结构,黄腐酸含有更多的C-O-C、C-O-H结构和磺基(-SO_3H)、硫醇基(-SH)等官能团。
The hymatomelanic, black humic acid and the fulvic acid(HM+Hy A & FA) were fractionated from the humic acid(HA) of Baiyinhua lignite by alkali extraction and analyzed the content by volumetric method. The factors influenced the extraction rate of HA were studied. The optimum experimental condition was determined with alkali concentration 0.5 mol/L, extraction time 5 h, acid separation pH 2, and the extraction rate of total humic acid was nearly 50%. IR spectrum proved that both HM+Hy A & FA have aromatic acid structure, while FA contains more C-O-C, C-O-H, sulfonic group(-SO3H) and thiol group(-SH).
作者
邹云鹏
刘云颖
赵晓静
林智慧
Zou Yunpeng;Liu Yunying;Zhao Xiaojing;Lin Zhihui(School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010)
出处
《腐植酸》
2018年第3期64-67,73,共5页
Humic Acid
基金
内蒙古自治区科技计划资助项目(项目编号201702027)
2016年内蒙古科技大学"大学生科技创新基金项目"(项目编号2016062)
关键词
腐植酸
褐煤
碱提
pH分级
结构
humic acid
lignite
sodium hydroxide extraction
pH fraction
construction