| 摘要: |
| 制备了铁酸钴-氧化铝（CoFe2O4-Al2O3）复合材料,并采用扫描电子显微镜（SEM）、X射线衍射（XRD）、比表面积和孔径分析仪对多孔CoFe2O4-Al2O3复合材料的物相和形貌进行了分析. 利用制备的CoFe2O4-Al2O3复合材料活化过硫酸氢钾（PMS）来降解废水溶液中的日落黄（SY）,通过研究CoFe2O4-Al2O3材料制备过程中Co2+,Fe3+和Al3+的物质的量之比、煅烧温度和时长对材料催化性能的影响,发现Co2+,Fe3+和Al3+的最佳物质的量之比为1:2:12,最佳煅烧温度为400 ℃和最佳煅烧时长为3 h. 对采用在最优条件下制得的CoFe2O4-Al2O3复合材料作为催化剂,PMS氧化降解含日落黄废水进行研究,考察了pH值、温度、不同体系、PMS用量、CoFe2O4-Al2O3材料用量和一些阴离子对日落黄降解的影响. 结果表明：在pH=7,温度为55 ℃条件下,用0.1 g催化剂和0.125 g PMS能使100 mL质量浓度为0.6 g·L-1的日落黄溶液在30 min内降解率达到99.5%. 同时,碳酸氢根负离子（HCO3-）和硝酸根负离子（NO3-）的加入抑制了日落黄的降解,而Cl-则能促进日落黄的降解. 此外,在进行4次循环使用后,CoFe2O4-Al2O3仍表现出很好的催化性能,日落黄去除效果仍能达到90%以上. |
| 关键词: 铁酸钴-氧化铝（CoFe2O4-Al2O3）复合材料 过硫酸氢钾（PMS） 日落黄（SY） 降解 |
| DOI：10.3969/J.ISSN.1000-5137.2024.01.006 |
| 分类号:TQ 426;X 703 |
| 基金项目: |
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| Preparation of CoFe2O4-Al2O3 composite material and its application in the treatment of wastewater containing sunset yellow |
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YIN Dachuan, LIU Jiarun, HE Yijing, QIAO Yu, LIANG Jie
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College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| In this study, cobalt ferrite-alumina（CoFe2O4-Al2O3） composite was successfully prepared. The phase and morphology of the porous CoFe2O4-Al2O3 composite were characterized by using scanning electron microspcope（SEM）, X-ray diffraction（XRD）, specific surface area and pore size analyzer. Then, the as-prepared CoFe2O4-Al2O3 composite was used to activate potassium monopersulfate（PMS） to degrade the sunset yellow（SY） in wastewater solution. The effects of the molar ratios of Co2+, Fe3+, and Al3+, calcination temperature, and time on the catalytic performance of the material during the preparation process of CoFe2O4-Al2O3 were studied. It was found that the optimal molar ratio of Co2+, Fe3+, and Al3+ was 1:2:12, the optimal calcination temperature was 400 ℃, and the optimal calcination time was 3 h. The CoFe2O4-Al2O3 composite obtained under the optimal conditions was used as a catalyst to study the oxidative degradation of sunset yellow wastewater by PMS. The effects of pH value, temperature, different systems, PMS dosage, CoFe2O4-Al2O3 dosage, and some anions on the degradation of sunset yellow were investigated. The results showed that under the conditions of pH=7 and 55 ℃, the degradation ratio of 100 mL of sunset yellow solution with a mass concentration of 0.6 g·L-1 could reach 99.5% within 30 min using 0.1 g catalyst and 0.125 g PMS. Meanwhile, the addition of bicarbonate anion（HCO3-） and nitrate anion（NO3-） inhibited the degradation of sunset yellow, while Cl- promoted its degradation. In addition, after four cycles of use, CoFe2O4-Al2O3 still exhibits good catalytic performance, and the removal effect of sunset yellow can still reach over 90%. |
| Key words: cobalt ferrite-alumina（CoFe2O4-Al2O3） composite potassium monopersulfate（PMS） sunset yellow（SY） degradation |
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