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Study on Buffering Behavior of Humates from Weathered Coal
Author(s): Zhu Jingtao, Su Zhenli, Ma Jianjun, Guo Mingjun, Zhang Guohui
Pages: 32-
35
Year: 2007
Issue:
4
Journal: HUMIC ACID
Keyword: 腐植酸钾; 腐植酸钠; 缓冲性能;
Abstract: 讨论了在不同pH值和温度条件下风化煤腐植酸盐对酸碱溶液的缓冲性能.结果表明:腐植酸盐在酸碱溶液pH>6时,离解出氢离子;pH<6时则具有絮凝作用吸纳氢离子.当腐植酸盐溶液浓度为1 g/L及5 g/L时,对pH值在3~9范围内的酸碱溶液,腐植酸钾可以通过缓冲作用使之保持在6~7之间,而腐植酸钠可使其保持在5~6.5之间.温度相同的条件下,腐植酸盐浓度大时缓冲能力较强,达pH值稳定平衡点所需要的时间较短.腐植酸盐浓度相同时,温度高达到pH值稳定平衡点所需要的时间较短.
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