[Recovery of Cd2+ by an electrolytic process from the concentrated solution of micellar enhanced ultrafiltration].
Micellar enhanced ultrafiltration (MEUF) is a new method which is based on the surfactant of the unique characteristic of parental molecular structure that can remove heavy metals in the water. The concentrated solution by dealing with the MEUF contains high concentration of heavy metal ions, so it must be need for further processing. The electrolysis method was employed to recovery Cd2+ from the concentrated solution of micellar enhanced ultrafiltration (MEUF). Effects of type of electrode, electrolysis voltage (U) and time (t), solution pH, surfactant to Cd2+ molar ratio ([SDS]/[Cd2+]) on Cd2+ recovery efficiency were investigated. The study found that the surfactant had some effect of resistance to electrolysis process. The optimum experimental conditions were obtained: stainless steel (anode)-graphite (cathode), U = 2.8 V, t = 100 min, pH = 4, [SDS]/[Cd2+] = 5 ([SDS] = 8.5 mmol/L constant). And the recovery efficiency of Cd2+ in the concentrated solution was 50.26%.
Lin
Dan
D
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. lindan_104@163.com
Zeng
Guang-Ming
GM
Huang
Jin-Hui
JH
Fang
Yao-Yao
YY
Qu
Yun-Huan
YH
Li
Xue
X
Luo
Fang
F
D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification*; D004572:Electrolysis; D013501:Surface-Active Agents / Q000737:chemistry*; D014462:Ultrafiltration / Q000379:methods; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*
D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D002104:Cadmium