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

作　　者：胡金星[1,2] 章林琼 韦凤琴 王卫 陈慧 晁小芳 沈超峰 HU Jinxing;ZHANG Linqiong;WEI Fengqin;WANG Wei;CHEN Hui;CHAO Xiaofang;SHEN Chaofeng(College of Science&Technology,Ningbo University,Ningbo 315300;College of Environmental and Resource Science,Zhejiang University,Hangzhou 310058;Zhejiang Environment Technology Co.,Ltd.,Hangzhou 310007)

机构地区：[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 [3]浙江省环境科技有限公司,杭州310007

出　　处：《环境科学学报》2020年第9期3382-3388,共7页Acta Scientiae Circumstantiae

基　　金：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)。

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.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.

关 键 词：生物泥浆法 多氯联苯 微生物 降解 

分 类 号：X53[环境科学与工程—环境工程]