Removal of aqueous humic acid by magnetic chitosan microspheres .

磁性壳聚糖去除水中腐殖酸的研究。

Effects of humic acid on growth of flue-cured tobacco .

腐殖酸对烤烟生长的影响研究。

Character of soil humic acids at three forest types in ta-ta-chia area .

塔塔加地区三种林型土壤腐植酸之特性。

We use the best lignite or peat , activity humic acid sodium manufacturing .

我们生产的活性腐植酸钠是采用中国最好的褐煤或泥炭。

Research on the removal of humic acid by enhanced coagulation .

强化混凝去除腐殖酸的试验研究。