Pollution due to heavy metals is a serious issue of the current century. Most of the heavy metals are extremely toxic to human beings and are discharged into the environment mainly by the industries. In developing countries, industrial waste water containing toxic metals are ineffectively treated by existing physical and chemical methods. Bioremediation using constructed wetland technology is effective and economical treatment technology for the developing countries.The utilization of wetland plants for different purposes after Bioremediation process is an added advantage.

Mercury, a very toxic and dangerous substance, has severely contaminated the environment and the food chain throughout India.With rising mercury imports continuing unabated, and a pollution problem that has already assumed gargantuan proportions, India sits on the brink of a disaster. Vembanadu Lake one of the Ramsar site in Kerala is polluted severely by heavy metals and mercury.The fishery sector in Vembanadu lake is under threat due to pollution. Vembanadu Lake once famous for its its rich source of fishes is in peril. Several species of fishes and other aquatic organisms were endangered....