Yu Rong, Zhao Cui, Liu Jiang-jiang, Chen Lü-jun, Wen Dong-hui
College of Environmental Science and Engineering, Peking University, Beijing 100871, China.
Huan Jing Ke Xue. 2010 Apr;31(4):1053-8.
In this study, a pyridine-degrading bacterium, Paracoccus denitrifican W12, was isolated. It was cultivated to grow on the surface of activated bamboo charcoal (ABC) particles so that the ABC turned into biological activated bamboo charcoal (BABC) covered with biofilm of the W12. Free cells of the W12 and the BABC were separately tested in removing pyridine from aqueous solution. The results showed that 0.31 g x L(-1) suspended growing-W12 completely degraded 48.70-1399 mg x L(-1) of pyridine within 26.5-48.9 h, while the BABC (attached growing-W12) degraded pyridine much more efficiently due to the combination of biodegradation and adsorption. When the dosage of BABC was 10.0 g x L(-1) at the temperature of 35 degrees C, 692.2 mg x L(-1) of pyridine was decreased by 52% in the first 3.6 h mainly by adsorption, then was totally removed within 23.7 h mainly by biodegradation. Increasing the dosage of BABC or batch of treatment promoted the efficiency of pyridine removal remarkably. The synergistic mechanism of BABC removing pyridine from aqueous solution was further discussed on the basis of its microstructure.
在本研究中，分离出了一株吡啶降解菌——反硝化副球菌W12。将其培养在活性竹炭（ABC）颗粒表面生长，使ABC转变为覆盖有W12生物膜的生物活性竹炭（BABC）。分别测试了W12的游离细胞和BABC从水溶液中去除吡啶的能力。结果表明，0.31 g·L⁻¹的悬浮生长型W12在26.5 - 48.9 h内可完全降解48.70 - 1399 mg·L⁻¹的吡啶，而BABC（附着生长型W12）由于生物降解和吸附的结合，降解吡啶的效率更高。当BABC用量为10.0 g·L⁻¹、温度为35℃时，692.2 mg·L⁻¹的吡啶在最初3.6 h内主要通过吸附减少了52%，然后在23.7 h内主要通过生物降解被完全去除。增加BABC用量或处理批次可显著提高吡啶去除效率。基于其微观结构，进一步探讨了BABC从水溶液中去除吡啶的协同机制。
