1.The results indicated that the trace elements molybdenum and zirconium increased considerably the gas yields of the lignitic organic matter while selenium did not.
分析结果表,元素外,随着钼元素和锆元素的加入,褐煤有机质气态产物的生成量显著提。
2.Humic acid (HA ) was abstracted from leonardite,and a composite superabsorbent (HA PSA ) was prepared by compounding poly (acrylic acid ) and lignitic humic acid.