Preparation of Adsorbent with Lead Removal Ability Using Sulfur-Impregnation

Abstract

Preparation of the adsorbent with lead removal ability using a sulfur impregnation was studied. Coal, palm shell, waste tire and diatomite, were used as raw materials. Raw material was mixed with K2S powder and then heated at 800 °C or 900 °C for 30 min in nitrogen to produce a sulfur-impregnated adsorbent. The sulfur-impregnated adsorbents prepared from coal, palm shell, waste tire and diatomite at 800 °C have lead removal property, and the order of lead removal ability is the adsorbent from coal = palm shell > waste tire > diatomite. The sulfur-impregnated adsorbent prepared from coal had a high sulfur content and high specific surface area. The adsorbent showed higher removal ability for lead ions from aqueous solution than zinc and cadmium ions in ternary Pb2+-Zn2+-Cd2+solution. These results indicate that the sulfur-impregnated adsorbent has high selective adsorption ability for lead ions in aqueous solutions.

Preparation of Sulfur-Impregnated Carbonaceous Filter with High Heavy Metal Adsorption Capacity

“…Recent studies have shown that adsorbents with sulfur group are effective for removing heavy metal ions from aqueous solution because heavy metals have a high affinity for the group of sulfur due to the Pearson's rule 14,15) . There are several methods for preparing a sulfurized adsorbent, for example, using a solution containing sulfur such as CS 2 16,17) , DMDS 18) , Na 2 S 19,20) , K 2 S [21][22][23][24] and so on.…”