Adsorption of Two Taste and Odor Compounds IPMP and IBMP by Granular Activated Carbon in Water

作者：An Na; Xie Hui hui; Gao Nai yun^*; Deng Yang; Chu Wen hai; Jiang Jin

来源：Clean-Soil Air Water, 2012, 40(12): 1349-1356.

DOI：10.1002/clen.201200040

• Adsorption mechanism
• Drinking water
• 2-Isobutyl-3-methoxy pyrazine
• 2-Isopropyl-3-methoxy pyrazine

Granular activated carbon (GAC) adsorption of two representative taste and odor (T & O) compounds, 2-isopropyl-3-methoxy pyrazine (IPMP), and 2-isobutyl-3-methoxy pyrazine (IBMP), in drinking water was investigated. Results show that the modified Freundlich equation best fit the experimental data during the adsorption isotherm tests, and the pseudo first-order kinetics and intra-particle diffusion kinetics well described the adsorption kinetics pattern. The calculated thermodynamic parameters (?H0, ?S0, and ?G0) indicated a spontaneous and endothermic adsorption process. Factors affecting the treatment efficiency were carefully evaluated. Acidic and alkaline conditions both favored GAC adsorption of IPMP and IBMP, especially the former. With the GAC dosage increasing, the first order adsorption rates increased, while the intra-particle adsorption rates decreased. Within 12?h, 200?mg/L GAC could remove >90% of 150 mu g/L IPMP and IBMP via adsorption at pH 311. Therefore, GAC is a promising treatment technology to control the T & O compounds associated water pollution.

• 出版日期2012-12
• 单位同济大学