Study on development of technology on removal of iron and manganese from groundwater;

Effects of dissolved oxygen in water on the removal of iron and manganese by biofilter for groudwater with ammonia nitrogen

Study on backwashing of bio-filter bed of iron and manganese removal in steady running period;

Through immobilizing the isolated Leptothrix bacteria on manganese sand and quartz sand,the iron and manganese removal efficiency by the biologically immobilized filtration columns were studied.

Five strains of iron and manganese removal bacteria were obtained from the biological film,which fell-off from mature filter bed and were incubated into culture media containing iron and manganese by repeatedly domestication.

Comparison between two kinds of iron removal techniques for steam condensed water;

Full-scale experimental study on iron removal from groundwater by fiber filtering media;

Application of basic zinc carbonate in iron removal of zinc sulfate solution

Study on deferrization and decontamination of silica sand in Dongshan County of Fujian Province;

Through the magnetic separation,acidwashing,sieving,reducing bleaching deferrization,the whiteness of product can be improved,and the reaction mechanism and charging system discussed.

Aiming at some defects and shortages existing in conventional deferrization processes,such as jarosite,goethite and spray processes,in zinc hydrometallurgy process and using new movements abroad for reference,the study on new technology for removing iron by phosphate has been carried out and satisfactory results have been achieved.