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- W2359097704 abstract "The effect of pH value of cathode buffer solution on electrokinetic(EK) remediation efficiency of heavy metals in the electroplating sludge was investigated.In these EK experiments,electrokinetic remediation apparatus was adopted,and the sludge collected from a electroplate factory and seriously polluted by Zn,Cu,Pb,Cr and Ni was used as materials.EK experiments were performed through cathode rinsing using cathode buffer solution with three different pH values and operated for 7 d at 32 V direct current power.The results showed that the pH value of cathode buffer solution changed the current markedly in the EK processes,the lower the pH value,the higher the current.After EK remediation,all experiment systems had different remediation efficiency.The best remediation effect of Ni,Cu,Zn and Cr was observed at pH 3,and the removal rates of Ni,Cu,Zn and Cr were 70%,59%,30% and 29% respectively,but the best remediation effect of Pb was observed at pH 5,and the removal rate of Pb was 46%.In addition,the concentrations of Zn,Cu,Cr,Pb and Ni in the five sections decreased in different degree,and the distribution of Cu,Pb and Ni was homogeneous in sections,but the distribution of Cr and Zn was fluctuated severely.We also found that all species of heavy metals were removed more or less,and among which the removal of carbonate bound fraction and residual fraction heavy metal was high,but the removal of exchangeable fraction and Fe-Mn oxide fraction heavy metal was low,and the removal of organic sulfide fraction heavy metal falls in between." @default.
- W2359097704 created "2016-06-24" @default.
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- W2359097704 date "2013-01-01" @default.
- W2359097704 modified "2023-09-24" @default.
- W2359097704 title "Effect of pH control at cathode on the electrokinetic removal of heavy metals from the electroplating sludge" @default.
- W2359097704 hasPublicationYear "2013" @default.
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