Technical Support

Humic acid as the most active part of humus , soil formation , physical and chemical properties , and plays a key role in fertility . No humus and humic…

Currently, the world average annual emissions of about 15,000 tons H g , C u about 3.4 million tons , P b of about 5 million tons , M n…

Arsenic and heavy metals from the tailings migration is a matter of concern , as this could cause potential harm to groundwater and ecology. Recently more and more attention is…