Preparation of Sulfur-impregnated Carbonaceous Adsorbent Using Mechanochemical Treatment

Abstract

We attempted to prepare the sulfur-impregnated carbonaceous adsorbent from bamboo using mechanochemical treatment under hydrogen sulfide atmosphere. Bamboo was pyrolyzed at 400°C under N₂ atmosphere to obtain the carbonaceous bomboo, and was treated with planetary ball mill under 10% H₂S atmosphere for mechanochemical treatment. As a result, sulfur-impregnated carbonaceous adsorbent with high nickel removal ability can be prepared from carbonaceous bamboo using mechanochemical treatment under H₂S atmosphere, while the bamboo without pyrolysis cannot be converted into the sulfur-impregnated bomboo with high nickel removal. The adsorption isotherm for nickel ion was found to be applicable to Langmuir model rather than Freundlich model, and the calculated maximum adsorption amount was 0.186mmol/g.