Heavy metal removal from acid mine drainage by calcined eggshell and microalgae hybrid system.
This study investigates the use of calcined eggshells and microalgae for the removal of heavy metals from acid mine drainage (AMD) and the simultaneous enhancement of biomass productivity. The experiment was conducted over a period of 6 days in a hybrid system containing calcined eggshells and the microalgae Chlorella vulgaris. The results show that the biomass productivity increased to ~8.04 times its initial concentration of 0.367 g/L as measured by an optical panel photobioreactor (OPPBR) and had a light transmittance of 95 % at a depth of 305 mm. On the other hand, the simultaneous percent removal of Fe, Cu, Zn, Mn, As, and Cd from the AMD effluent was found to be 99.47 to 100 %. These results indicate that the hybrid system with calcined eggshells and microalgae was highly effective for heavy metal removal in the AMD.
Department of Environmental Engineering, Catholic Kwandong University, Beomil-ro 579, Gangneung, 210-701, Korea, hjchoi@cku.ac.kr.
Hee-Jeong
HJ
Choi
Seung-Mok
SM
Lee
D000818:Animals; D018533:Biomass; D048408:Chlorella vulgaris / Q000254:growth & development / Q000378:metabolism*; D004528:Egg Shell / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification* / Q000378:metabolism; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism*; D008906:Mining; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism; D018508:Water Purification
D019216:Metals, Heavy; D062065:Wastewater; D014874:Water Pollutants, Chemical