PemanfaatanserbukKayuMerantiMerah{ShoreaparvifatiuDyer)Sebagai 3240 Biosorben lon Logam Cd(II)

Abstract

Meranti merah sawdus" an abundant and inexpensive material, was used as an adsorbent for the removal of Cd(tr) from wastcr*ater. This research was divided into two tneatnirents, namely: activation of sawdust with toluene and ethanol ( 1 : 1) and without activation of sawdust at variation of contact timg pH, and concentrdion- Ctncentration of Cd(II) ions before and after adsorption were determined by Atomic Adsorption Spectrophotometer (AAS). The results showed that optimum time was 120 minutes for sow'dus qitiout activation and 100 minutes for sawdust with activation, whereas optimum pH for both reatment were 5. Adsorption capacity was studied by both Langmuir isotherm and Freundlich iso&erm. Adsorption capacity value (Qo) was 2;4631\ud mg/g for sawdust without activation ud 11834 mglg far sawdust with activation. Functional gfoups involved in this biosorption for sawdug without activation and sawdust with activation were-OH