菌渣生物炭负载四氧化三铁催化降解罗丹明B
收稿日期: 2022-06-17
网络出版日期: 2023-04-13
基金资助
河北省自然基金面上项目(E2020208054);河北省药用分子化学重点实验室开放课题基金(2022PT10)
Catalytic degradation of Rhodamine B by ferroferric oxide-loaded bacterial residue biochar
Received date: 2022-06-17
Online published: 2023-04-13
考虑到催化剂载体的高成本，寻求廉价的载体制备方案合成催化剂具有重要意义。通过热解青霉素菌渣制备多孔生物炭载体，以共沉淀法负载四氧化三铁，合成催化剂Fe3O4@PRBC。通过SEM、XRD、FT-IR和孔隙结构分析对催化剂进行表征，并以罗丹明B（RhB）为目标降解污染物，考察了不同体系、催化剂用量、双氧水用量、溶液pH和RhB浓度对处理效果的影响。结果显示，四氧化三铁成功负载于生物炭上，Fe3O4@PRBC表面呈粗糙多孔状，比表面积达到1 210.54 m²/g。其中H2O2/Fe3O4@PRBC体系表现出突出的催化性能，当Fe3O4@PRBC用量为0.8 g/L、双氧水用量为30 mmol/L时、在pH=3~11时，RhB的降解率均超过90%。催化循环4次，降解率仍能达到90%。自由基淬灭实验显示，催化降解RhB的主要活性物质为·OH和·O2-。对实际印染废水进行类芬顿降解实验，COD去除率高于80%，色度去除率达到100%。
刘蕊 , 高玮 , 张文静 , 安鸿雪 , 李再兴 . 菌渣生物炭负载四氧化三铁催化降解罗丹明B[J]. 无机盐工业, 2023 , 55(4) : 111 -119 . DOI: 10.19964/j.issn.1006-4990.2022-0370
Considering the high cost of catalyst carriers，it is significant to seek cheap carrier preparation method for synthesizing catalysts.The porous biochar（PRBC） was prepared as the carrier by pyrolysis of penicillin residue，and Fe3O4@PRBC was synthesized by co-precipitation loaded with Fe3O4.The catalysts were characterized by SEM，XRD，FT-IR and pore structure analysis，and the effects of different systems，catalyst dosage，H2O2 dosage，solution pH and Rhodamine B（RhB） concentration on the treatment effect were investigated by using RhB as the target degradation pollutant.The results showed that Fe3O4 was successfully loaded on biochar，and the surface of Fe3O4@PRBC was rough and porous with a specific surface area of 1 210.54 m²/g.The H2O2/Fe3O4 @PRBC system showed outstanding catalytic characteristics.When the dosage of Fe3O4@PRBC was 0.8 g/L，H2O2 dosage was 30 mmol/L，the degradation rate of RhB was exceeded 90% in the range of pH=3~11.After recycling for 4 times，the degradation rate could still reach 90%.The free radical quenching experiment showed that the main active substances that catalyzed the degradation of RhB were ·OH and ·O2-.The Fenton-like degradation test was carried out on actual printing and dyeing wastewater，the COD removal rate was higher than 80%，and the chromaticity removal rate reached 100%.
Key words： biochar; Fe3O4; heterogeneous Fenton; Rhodamine B; penicillin residue
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