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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51886

Title: Improvement of Oxygen Release from Calcium Peroxide‐polyvinyl Alcohol Beads by Adding Low‐cost Bamboo Biochar and Its Application in Bioremediation
Authors: Chih‐Hung Wu
Shih‐Hsien Chang
Chi‐Wen Lin
Contributors: 國立臺灣海洋大學:地球科學研究所
Keywords: Biomass
BTEX (benzene, toluene, ethylbenzene, xylene)
Oxygen‐releasing beads
Response surface method
Date: 2015-02
Issue Date: 2019-01-03T03:08:38Z
Publisher: CLEAN - Soil, Air, Water
Abstract: Abstract: A limited concentration of dissolved oxygen commonly reduces the effectiveness of groundwater bioremediation. A novel bamboo biochar oxygen‐releasing bead (ORB) was prepared and its application in groundwater bioremediation was evaluated. The results reveal that bamboo biochar effectively adsorbed benzene, toluene, ethylene, and xylene. The Freundlich model described the adsorption behavior (R2 = 0.990) well. The response surface method was used to prepare biochar‐ORBs. Results indicate that the proportions of calcium peroxide, citrate, polyvinyl alcohol, and bamboo biochar for the optimal oxygen‐releasing capacity of biochar‐ORBs were 20:2.22:9.23:31.5 (w/w/w/w). A multiple linear regression equation effectively predicted oxygen releasing capacity (R2 = 0.991). A column experiment indicated that the period of oxygen release from biochar‐ORBs (104 days) was much longer than that from ORBs (51 days). The mechanical strength of biochar‐ORBs (disintegration ratio: 3.4%) exceeded that of ORBs (disintegration ratio: 6.9%). Degraders that contained biochar‐ORBs rapidly removed 99% toluene at a concentration of 45.6 mg L−1. Scanning electron microscopy showed that degraders attached to and grew on biochar‐ORBs following bioremediation. Taken together, the results reveal that biochar‐ORB is a potential oxygen‐releasing material for use in groundwater bioremediation.
Relation: 43(2) pp.287-295
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51886
Appears in Collections:[應用地球科學研究所] 期刊論文

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