碳纳米颗粒协同硫酸盐还原菌处理含铜废水

Carbon Nanoparticles-Assisted Sulfate Reducing Bacteria as an Efficient Approach for Removal of Copper(Ⅱ) Ions from the Effluent

该研究采用碳纳米颗粒(carbon nanoparticles,CNPs)协同硫酸盐还原菌菌群(sulfate reducing bacterium,SRB)构建了一个成本低廉且高效的体系处理含Cu(Ⅱ)废水。CNPs表面富含羟基和羧基,具有良好的亲水性。不仅能增加铜离子的去除效率而且提高了SRB耐重金属的能力,使SRB对铜金属的耐受性从100 mg/L提高到了150 mg/L。并且在Cu(Ⅱ)初始浓度为100 mg/L,处理48 h时,SRB/CNPs体系的铜的去除效率达到90.67%。同等条件下的SRB体系和CNPs体系铜的去除效率为40.67%和20.67%。表明新构建的SRB/CNPs体系处理含铜废水具有广阔的应用前景。

The study aims at establishing a low-cost and efficient approach by using carbon nanoparticles-assisted sulfate reducing bacteria for the removal of Cu（Ⅱ） in the effluent. The results demonstrated that carbon nanoparticles（CNPs） can freely disperse in water as they have many hydroxyl and carboxyl groups on their surfaces,which increase the removal rate and resistance of sulfate-reducing bacteria（SRB） to metal toxicity. Cu（Ⅱ） concentration for hampering the bacteria was significantly increased from 100mg/L to 150 mg/L. The removal rate of Cu（Ⅱ） with initial concentration of 100 mg/L was90.67% in SRB/CNPs system in 48 h,while only 40.67% and 20.67% in SRB and CNPs on the same condition,respectively.It was shown that the novel SRB/CNPs system has the broad application prospects for removing Cu（Ⅱ）from the effluent.