风化煤腐植酸盐缓冲性能的研究  

Study on Buffering Behavior of Humates from Weathered Coal

作　　者：朱京涛[1] 苏振利[1] 马建军[1] 郭明军[1] 张国辉[1] 

机构地区：[1]河北科技师范学院,昌黎066600

出　　处：《腐植酸》2007年第4期32-35,共4页Humic Acid

摘　　要：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1g/L及5g/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。This paper discussed the buffering behavior of humates from wheathered coal at both different pH values and different temperatures. The results showed that when pH value of the solution was above 6, the humate would release H^＋, but when the pH was below 6, it would absorb H^＋. When the solution concentration of humate was 1 g/L and 5 g/L and its pH value was between 3 and 9, potassium humate could keep the pH value of solution between 6 and 7, while sodium humate could keep the pH value between 5 and 6,5. When the temperature was kept constant, the higher concentration of humate was needed for its pH value to reach its balance due to the stronger buffering effect of humate. But when the solution concentration of humate was held constant, the higher temperature was needed for the pH value to reach its balance.

关 键 词：腐植酸钾 腐植酸钠 缓冲性能 

分 类 号：S141[农业科学—肥料学]