RESEARCH ON HANDLING HEAVY METAL POLLUTION (Cd, Pb, Zn, Cu) IN WATER BY WATER HYACINTH (EICHHORNIA CRASSIPES) AND REED (PHRAGMITES AUSTRALIS)

Abstract

This study carried out experiments to cultivate Water hyacinth and Reed in sample containers containing heavy metal-contaminated water at the following concentrations: 0.5 mg/L Cd, 2 mg/L Pb, 5 mg/L Zn, 5 mg/L Cu. Heavy metal concentrations in sample containers are checked after 5-10-20-30-40 days. The
results show that both Water hyacinth and reed are capable of accumulating heavy metals (Zn. Cd, Pb, Cu). After 20-40 days, the rate of cleaning of water hyacinth and reed is almost 80%. The ability to clean the Pb contaminated water of Water hyacinth is faster than that of Cd, Zn, Cu polluted water while the ability to clean the Cd contaminated water of Reed is faster than that of polluted water of Cd, Zn and Cu.