胶质芽孢杆菌、黑曲霉及与沸石联合对模拟废水中Fe~（3＋）处理研究

研究沸石、胶质芽孢杆菌（Bacillus mucilaginosus）、黑曲霉（Aspergillus Niger）、胶质芽孢杆菌与沸石联合以及黑曲霉与沸石联合对模拟废水中Fe3＋的吸附等温曲线,分析它们对Fe3＋模拟废水的吸附及絮凝作用。结果表明：沸石对Fe3＋吸附作用符合Freundlich方程;胶质芽孢杆菌分泌含有—OH和COO-的胞外多糖,对Fe3＋具有较好的吸附效果;沸石与胶质芽孢杆菌联合对模拟废水中Fe3＋的处理,低浓度以沸石对Fe3＋的吸附为主,加入胶质芽孢杆菌絮凝剂使吸附了Fe3＋的沸石进行絮凝沉降,吸附等温曲线符合Langmuir吸附等温方程,高浓度两者共同作用使吸附量增加;黑曲霉对Fe3＋的吸附符合BET吸附等温方程;沸石与黑曲霉两者共同作用对Fe3＋模拟废水吸附等温曲线为直线。通过去除效果对比分析可知：胶质芽孢杆菌既有吸附又有絮凝功能;胶质芽孢杆菌絮凝剂无论是对Fe3＋的吸附还是对吸附Fe3＋沸石的絮凝都比黑曲霉对Fe3＋处理效果好;胶质芽孢杆菌和一些非金属矿物复合处理污染废水是一种无毒、低成本环保的处理方法,本研究将为它们在工程中的应用提供实践依据。

Removal of Fe~（3＋） in simulated wastewater by Bacillus mucilaginosus, Aspergillus niger,zeolite and their different combination

The adsorption isotherms of simulated wastewater containing Fe3＋ were studied under the condition of adding zeolite,Bacillus mucilaginosus mucilaginosus,Aspergillus nige niger or their different combination,and the effects of their flocculation and adsorption were analyzed.The results show that adsorbing Fe3＋ to zeolite follows Freundlich equation;B.mucilaginosus can secrete extracellular polysaccharides containing —OH and COO-which possess stronger adsorption ability.For the co-acted flocculation by zeolite and the bacterial,adsorbing Fe3＋ to zeolite is dominant in low concentrations,adding the bacterial can accelerate the precipitation of Fe3＋-loaded zeolite and the adsorption isotherm agrees with Langmuir equation,and the co-action of zeolite and the bacterial make adsorption rate increase in high concentrations.Fe3＋ adsorption by A.niger follows BET adsorption isotherm equation.The co-action of zeolite and A.niger in wastewater make the adsorption isotherm agree with linear.By comparing the removal of different absorbents,the bacterial has adsorption ability and flocculation ability,and the bacterial flocculation ability is stronger on Fe3＋ or Fe3＋-loaded zeolite than the fungal.The treatment method using combination of microbe and zeolite is nontoxic and cheap which will pave the way for their potential use in practice.