CARBON DIOXIDE ENHANCED COMPLEX-ADSORPTION PROCESS FOR METAL OR METALLOID REMOVAL FROM WATER

摘要

A method of removing metal or metalloids, arsenic in particular, from groundwater or another source of contaminated water. The method comprises providing a water source (2), contacting the water source with CO4 whereby the pH of the water source is lowered to produce pretreated water ,contacting the pretreated water with a metal or metalloid complex-absorbing substance whereby contaminants are separated from the remainder of the pretreated water to produce metal or metalloid-depleted water (6), and stripping the CO2 from the metal or metalloid-depleted water, whereby the pH of metal or metalloid-depleted water is increased (8). A system for metal removal utilizing the CO2 process is also provided.