Derivation of optimum treatment conditions per heavy metal contamination for electrical membrane and convergent process apparatus in electromagnetic field

摘要

Objective of the present study is to derive appropriate study factors upon introduction of purification technique with mounting of multi-type of electrical membranes in an industrial combined with contaminated underground water. For reaction times of 5~40mins, removal rates according to the strength of voltages were calculated and optimum operating factors of the electrical membrane were derived according to treatment conditions per concentration of electrode liquid using electrical membranes. The removal rates as a function of voltages were shown to be 88% at 15V for Ni, 65% and 68% at 15V and 20V, respectively, for Cr. In the comlex modulation electromagnetic field, Cr showed the removal rates of 80% and 85% at 15V and 20V, respectively, while Ni showed the removal rates of 94% and 97% at 10V and 15V, respectively. When the concentrations of electrode liquid (Na_2SO_4) were varied upon electrode membrane treatment, the removal concentration for 0.5% was 1.8mg/l in the case of 20V resulting in the removal rate of 91%. In case of 1% of electrode liquid (Na_2SO_4), the final concentrations at 15V and 20V were shown to be below 1mg/1 in both cases, and high removal tates above 98.9% could be obtained in the treatement with combined application of the electromagnetic field.