Phytoremediation of some pesticides by water hyacinth (Eichhornia crassipes Solms)

Abstract

The effectiveness of the phytoremediation of ethion, dicofol and cyhalothrin by water hyacinth (Eichhornia crassipes Solms) was studied. In 250mL of nutrition solution containing one of the above-named pesticides at a concentration of 1 mg/L and a living water hyacinth plant weighing about 10-11 g·FW, it was found that the dissipation rate constants of these pesticides were raised by 283%, 107%, and 362% respectively compared with those in a solution of same concentration but without water hyacinth plant. According to the amounts of pesticides accumulated in water hyacinth plant and that disappeared from the culture solution, the contributions of water hyacinth and microorganism to the dissipation of ethion, dicofol and cyhalothrin in a 10 days period were 69%, 38% and 63%, and 20%, 14% and 15%, respectively.

Keywords

• water hyacinth
• ethion
• dicofol
• cyhalothrin
• phytoremediation