胡金星,章林琼,韦凤琴,王卫,陈慧,晁小芳,沈超峰.好氧生物泥浆法降解土壤中三氯代多氯联苯的影响因素分析[J].环境科学学报,2020,40(9):3382-3388
好氧生物泥浆法降解土壤中三氯代多氯联苯的影响因素分析
- Influence factors of aerobic bioslurry treatment for the degradation of tri-chlorinated biphenyls in soil
- 基金项目：国家自然科学基金（No.41907100，21876149）；浙江省自然科学基金（No.LQ18B010001，LQ19B070002）；宁波市自然科学基金（No.2017A610299，2018A610083）
- 胡金星
- 1. 宁波大学科学技术学院, 宁波 315300;2. 浙江大学环境与资源学院, 杭州 310058
- 章林琼
- 浙江省环境科技有限公司, 杭州 310007
- 沈超峰
- 浙江大学环境与资源学院, 杭州 310058
- 摘要：采用好氧生物泥浆法处理多氯联苯（PCBs）污染土壤，基于五因素三水平正交试验探究葡萄糖、联苯、任意甲基化-β-环糊精（RAMEB）、土水比和降解菌剂5个因素对PCBs降解效率的影响.结果表明：在好氧生物泥浆体系中，仅三氯代PCBs含量显著下降（最高降解率为42.1%），而四氯~七氯代PCBs含量无显著变化.以三氯代PCBs的降解率为试验指标，对正交试验结果进行极差分析，可知影响三氯代PCBs好氧降解率的主次因素依次为：土水比、RAMEB、葡萄糖、降解菌剂、联苯.其中，葡萄糖和联苯对三氯代PCBs的降解有抑制作用，而土水比、RAMEB及降解菌剂对三氯代PCBs的降解有促进作用.因此，通过提升泥浆体系传质水平、提高PCBs生物有效性及增加降解菌数量，有望进一步提高好氧生物泥浆法降解PCBs的效率.
- Abstract：The orthogonal experiment was adopted to study the effects of glucose, biphenyl, randomly methylated-β-cyclodextrins (RAMEB), soil-to-water ratio and degrading bacteria on the degradation of polychlorinated biphenyls (PCBs) in aerobic bioslurry system. It was found that the concentrations of tri-chlorinated biphenyls (tri-CBs) was significantly reduced and the maximum degradation rate of tri-CBs was 42.1%, while the concentrations of tetra- to hepta-chlorinated biphenyls varied insignificantly. The degradation rates of tri-CBs were used as indicators for the extreme difference analysis. And the result showed that the factors which influencing the degradation rates of tri-CBs in order were as follow:soil-to-water ratio, RAMEB, glucose, degrading bacteria and biphenyl. Glucose and biphenyl showed inhibition effects on the degradation of tri-CBs, while the other three factors had improvement effects on the degradation of tri-CBs. Thus, the degradation efficiency of PCBs in aerobic bioslurry system could be improved by promoting the mass transfer of slurry, increasing the bioavailability of PCBs and increasing the quantity of degrading bacteria.
