Removal of sulfide ions from aqueous solutions using carbon-containing sorbents from rice straw

Abstract

Sulfide sorption methods are widely used in the waste water treatment practice. The most promising sorbents for removing sulfide ions are porous carbon materials. In the present study we researched the physico-chemical, structural properties and sorption capacity of the carbonaceous sorbent based on rice straw. It was found that this sample is amorphous and has a predominant microporous structure with average pore diameter 2 nm. At the concentration of sulfide ions ranging from 140 to 800 μg·L-1 the studied sorbent reduces the amount of sulfide ions to 0.4–1.4 of the maximum permissible concentration and can be used for treating natural and post-treating waste waters.