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The removal of Cu2+ and Cd2+ of aqueous solution by residual sludge from four type sewage treatment plant was investigated. Effect of adsorption time, kinetics and thermodynamics of adsorption was researched. The study indicated that all of the sludge can absorb mono-component Cu2+ or Cd2+ but the sludge from Petrochemical Wastewater plant had deposition rather than adsorption on Cu2+ or Cd2+. The...
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