玉米秸秆生物炭固定化Acinetobacter lwoffii DNS32性能研究
发布时间：2018-01-16 14:31
本文关键词：玉米秸秆生物炭固定化Acinetobacter lwoffii DNS32性能研究 出处：《农业环境科学学报》2017年02期 论文类型：期刊论文
【摘要】：用玉米秸秆制备生物炭,并以其作为固定化菌剂的廉价载体,与阿特拉津降解菌Acinetobacter lwoffii DNS32制备成具有吸附-降解性能的新型菌剂,用以降解水溶液中阿特拉津。结果表明:固定化菌剂可在40 h内将100 mg·L~(-1)的阿特拉津降解94%,降解率比游离菌高24%;固定化菌剂在pH=5和pH=10时,降解率分别为42%和35%,说明其具有更好的pH适应性;温度为10℃时,固定化菌剂的降解率比游离菌高14%,说明其具有更好的耐寒性。为期30 d的模拟修复阿特拉津污染的实验表明:生物炭固定化菌剂在30 d后仍然具有活性,该固定化菌剂具有高效且持久的阿特拉津污染修复效果。
[Abstract]:Biochar was prepared from corn straw and used as a cheap carrier for immobilized bacteria. A novel adsorption-degradation agent was prepared with Atrazine degrading bacteria Acinetobacter lwoffii DNS32. The results showed that the immobilized bacteria could degrade atrazine 100 mg 路L ~ (-1) in 40 h, and the degradation rate of atrazine was 24% higher than that of free bacteria. The degradation rates of immobilized bacteria at pH=5 and pH = 10:00 were 42% and 35, respectively, which indicated that the immobilized bacteria had better pH adaptability. When the temperature was 10 鈩，
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