Abstract: Sulfohydryl cellulose(SC) was synthesized by reacting cellulose with sulfohydryl acetic acid in the medium of acetic anhydride and acetic acid.Alkali was added into heavy-metal waste water to adjust pH value 9-10,followed by sedimentation and filtration.Then the filtrate was adjusted to pH value 5-7 and flowed through SC tube to remove Cd(II),Pb(II),Cu(II),Hg(II) in the waste water.SC tube was regenerated by dilute hydrochloric acid.Conditions of treatment and regeneration,along with adsorption mechanism were studied.Saturated adsorptive capacity of SC was more than 0.2 mol/kg SC when sulfohydryl content in SC was more than 2%.The concentrations of metal ions Cd(II),Pb(II),Cu(II),Hg(II) in the filtrate were all below 0.05 mg/L.The regenerated SC can be reused.

Key words: sulfohydryl cellulose, heavy metal, waste water treatment