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我院教师在生物炭基复合材料开发及复合污染水体修复方面取得新进展
作者: 文章来源:tmgc1234 日期:2021-08-27

2021826日,我院水文与水资源工程教研室付敦博士以第一作者在Environmental Pollution (SCI,中科院一区Top期刊,影响因子:8.071)发表题为Co-oxidative removal of arsenite and tetracycline based on a heterogeneous Fenton-like reaction using iron nanoparticles-impregnated biochar的研究论文。该文介绍了沼渣生物炭基纳米复合材料介导的类芬顿反应高效修复抗生素和有毒砷双重污染的水体,揭示了氮硫自掺杂生物炭和纳米铁协同促进双氧水分解产活性氧自由基的机理,为沼渣废物管理兼具有机无机复合污染水体修复提供了思路。

该研究工作得到了宿州学院博士/博士后科研启动基金(2019jb142021bsh002)的经费资助与矿井水资源化利用安徽省普通高校重点实验室的平台支持。

摘要:A highly efficient, eco-friendly and relatively low-cost catalyst is necessary to tackle bottlenecks in the treatment of industrial wastewater laden with heavy metals and antibiotic such as livestock farm and biogas liquids. This study investigated co-oxidative removal of arsenite (As(III)) and tetracycline (TC) by iron nanoparticles (Fe NP)-impregnated carbons based on heterogeneous Fenton-like reactions. The composites included Fe NP@biochar (BC), Fe NP@hydrochar (HC), and Fe NP@HC-derived pyrolysis char (HDPC). The functions of N and S atoms and the loading mass of the Fe NP in the Fe NP@BC in heterogeneous Fenton-like reactions were studied. To sustain its cost-effectiveness, the spent Fe NP@BC was regenerated using NaOH. Among the composites, the Fe NP@BC achieved an almost complete removal of As(III) and TC under optimized conditions (1.0 g/L of dose; 10 mM H2O2; pH 6; 4 h of reaction; As(III): 50 μM; TC: 50 μM). The co-oxidative removal of TC and As(III) by the Fe NP@ BC was controlled by the synergistic interactions between the Fe NPs and the active N and S sites of the BC for generating reactive oxygen species (ROS). After four consecutive regeneration cycles, about 61 and 95% of As(III) and TC removal were attained. This implies that the spent carbocatalyst still has reasonable catalytic activities for reuse. Overall, this suggests that adding technological values to unused biochar as a carbocatalyst like Fe NP@BC was promising for co-oxidative removal of As(III) and TC from contaminated water.


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