Biodegradation of bisphenol A by an algal-bacterial system

被引:50
|
作者
Eio, Er Jin [1 ]
Kawai, Minako [2 ,3 ]
Niwa, Chiaki [3 ]
Ito, Masato [3 ]
Yamamoto, Shuichi [3 ]
Toda, Tatsuki [3 ]
机构
[1] Soka Univ, Grad Sch Engn, Hachioji, Tokyo 1928577, Japan
[2] Asian Peoples Exchange, Taitou Ku, Tokyo 1100003, Japan
[3] Soka Univ, Fac Engn, Dept Environm Engn Symbiosis, Hachioji, Tokyo 1928577, Japan
关键词
Algal-bacterial system; Bacterial consortium; Biodegradation; Bisphenol A; Inhibition; Photosynthetic oxygen; MICROALGA CHLORELLA-SOROKINIANA; ESTROGENIC ACTIVITY; ENVIRONMENTAL FATE; SALICYLATE BIODEGRADATION; AZOSPIRILLUM-BRASILENSE; ALGINATE BEADS; WASTE-WATER; DEGRADATION; GROWTH; PHOTOBIOREACTORS;
D O I
10.1007/s11356-015-4693-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The degradation of bisphenol A (BPA) by Chlorella sorokiniana and BPA-degrading bacteria was investigated. The results show that BPA was partially removed by a monoculture of C. sorokiniana, but the remaining BPA accounted for 50.2, 56.1, and 60.5 % of the initial BPA concentrations of 10, 20, and 50 mg L-1, respectively. The total algal BPA adsorption and accumulation were less than 1 %. C. sorokiniana-bacterial system effectively removed BPA with photosynthetic oxygen provided by the algae irrespective of the initial BPA concentration. The growth of C. sorokiniana in the algal system was inhibited by BPA concentrations of 20 and 50 mg L-1, but not in the algal-bacterial system. This observation indicates that bacterial growth in the algal-bacterial system reduced the BPA-inhibiting effect on algae. A total of ten BPA biodegradation intermediates were identified by GC-MS. The concentrations of the biodegradation intermediates decreased to a low level at the end of the experiment. The hypothetical carbon mass balance analysis showed that the amounts of oxygen demanded by the bacteria are insufficient for effective BPA degradation. However, adding an external carbon source could compensate for the oxygen shortage. This study demonstrates that the algal-bacterial system has the potential to remove BPA and its biodegradation intermediates.
引用
收藏
页码:15145 / 15153
页数:9
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