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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51912

Title: Novel oxygen-releasing immobilized cell beads for bioremediation of BTEX-contaminated water.
Authors: Lin Chi-Wen
Chih-Hung Wu
Chen-Ting Tang
Shih-Hsien Chang
Contributors: 國立臺灣海洋大學:地球科學研究所
Date: 2012-11
Issue Date: 2019-01-04T07:55:22Z
Publisher: Bioresource technology
Abstract: Abstract: Novel oxygen-releasing bead (ORB) and oxygen-releasing immobilized cell bead (ORICB) were prepared. Their oxygen releasing characteristics and effect on degradation of benzene, toluene, ethylbenzene, and xylene (BTEX)-contaminated groundwater were evaluated in a column. ORB prepared by CaO(2)-encapsulated freezing had much better oxygen-releasing capacity (0.526 mg O(2) per ORB) than that by the mixing-freezing method. The encapsulated-ORB did not influence groundwater pH. Two BTEX degraders were utilized to prepare the ORICB. The ORICBs-column rapidly (hydraulic retention time: 0.872 day) degraded BTEX after a 2-5 day acclimation period. The BTEX removal increased as flow distances increased. At BTEX concentration of 120 mg L(-1), 67% of benzene and 81-90% of TEX were removed. The SEM shows that micropores existed in the ORBs and BTEX degraders were immobilized. The denaturing gradient gel electrophoresis profiles indicate that BTEX degraders were distributed throughout the column. The BTEX concentration of 120 mg L(-1) markedly altered the structure of the indigenous microbial community.
Relation: 124 pp.45-51
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51912
Appears in Collections:[應用地球科學研究所] 期刊論文

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