腐植酸溶液在煤表面接触角的实验研究

EXPERIMENTAL STUDY ON CONTACT ANGLE BETWEEN HUMIC ACID AND COAL SURFACE

测定了不同浓度及不同 p H值下黄腐酸溶液的表面张力及其在煤表面的接触角 .结果表明 :随浓度的增大 ,黄腐酸溶液的表面张力减小 ,而在煤表面的接触角增大 ;在酸性条件下随 p H值的增大 ,黄腐酸溶液在煤表面的接触角减小且变化明显 ;在碱性条件下 。

Experiment measures the surface tension of fulvic acid(FA) solution and contact angle between FA solution and coal surface under different concentration and pH value.The result has shown that when FA concentation increase,surface tension of FA solution diminish,and contact angle between FA solution and coal surface increase;when pH value augment,contact angle diminish and change distinctly under acidic condition,but contact angle didn′t change patently under alkalinous condition.