Heavy Metal Concentration in Water and Accumulation in Water Hyacinth Grown in the Tha Chin River

Abstract

The Tha Chin River was considered as a contaminated river of heavy metals. Also there was loads of water hyacinth grow along Tha Chin River. In this study, water and water hyacinth were collected from two different stations; Pho Phraya station and Song Phi Nong station. For water quality, the surface water quality standard, COD, TDS, EC, Turbidity, and Salinity were measured. The water quality in Tha Chin River was in an acceptable level except for DO. The trend of heavy metals concentration in Tha Chin River was Zn>Pb>Cd>Cu>Ni and none of heavy metals exceeded water quality. Heavy metals concentration in Song Phi Nong station was higher than heavy metals concentration in Pho Phraya station. Water hyacinth were separated into two parts; roots and shoots. The results showed that water hyacinth tended to accumulate heavy metals in roots rather than shoots. Also the trend of heavy metals in water hyacinth was Cu>Zn>Pb>Ni>Cd. Biomass of water hyacinth in Song Phi Nong station was higher than water hyacinth in Pho Phraya station. Also the results showed that water hyacinth that growth in Song Phi Nong station was accumulated heavy metals more than water hyacinth in Pho Phraya station.