Removal of phenol and conventional pollutants from aqueous effluent by chitosan and chitin

Quimica nova

Keukeleire, Denis de¹  Milhome, Maria Aparecida L.²  Nascimento, Ronaldo F.³  Carvalho, Tecia Vieira³  Queiroz, Danilo Caldas³  Ribeiro, Jefferson P.³ 

[1] Ghent University;Universidade Federal do Ceará;Universidade Federal do Ceará, Fortaleza, Brasil

关键词: adsorption;    chitosan;    phenol.;   

DOI  :  10.1590/S0100-40422009000800025

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The present study deals with phenol adsorption on chitin and chitosan and removal of contaminants from wastewater of a petroleum refinery. The adsorption kinetic data were best fitted to first- and second-order models for chitosan and chitin, respectively. The results of adsorption isotherms showed Langmuir model more appropriately described than a Freundlich model for both adsorbents. The adsorption capacity was 1.96 and 1.26 mg/g for chitin and chitosan, respectively. Maximum removal of phenol was about 70-80% (flow rate: 1.5 mL/min, bed height: 18.5 cm, and30 mg/L of phenol. Wastewater treatment with chitin in a fixed-bed system showed reductions of about 52 and 92% for COD and oil and greases, and for chitosan 65 and 67%, respectively. The results show improvement of the effluent quality after treatment with chitin and chitosan.

【 授权许可】

CC BY