钢渣/氮掺杂改性活性炭催化过硫酸盐降解罗丹明B  

Catalytic degradation of Rhodamine B by steel slag/nitrogen-doped modified activated carbon

作　　者：黄艳[1] 邢波 晏伟 杨郭 范凤艳 张华芳[1] 汤鲲彪 HUANG Yan;XING Bo;YAN Wei;YANG Guo;FAN Fengyan;ZHANG Huafang;TANG Kunbiao(Sichuan Vocational College of Chemical Technology,Luzhou 646000,China;School of Chemical and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;Sichuan Tianhua Co.,Ltd.,Luzhou 646000,China;Sichuan Honghua Industrial Co.,Ltd.,Leshan 614000,China)

机构地区：[1]四川化工职业技术学院,四川泸州646000 [2]四川轻化工大学化学工程学院,四川自贡643000 [3]四川天华股份有限公司,四川泸州646000 [4]四川红华实业有限公司,四川乐山614000

出　　处：《工业水处理》2024年第2期147-156,共10页Industrial Water Treatment

基　　金：四川省自然科学基金青年基金项目(2023NSFSC1118);钒钛资源综合利用四川省重点实验室项目(2018FTSZ12,2018FTSZ18);西华师范大学化学合成与污染控制四川省重点实验室开发课题(CSPC202107,CSPC202203);四川轻化工大学留学归国人才项目(2021RC25);自贡市省级转移支付科技支撑项目(2021SZYZF01)。

摘　　要：以提高钢渣资源化利用和深度降解有机污染物为研究目标,通过改变氨气煅烧温度制备了系列钢渣/氮掺杂改性活性炭复合材料,并用于催化过硫酸钠处理罗丹明B(RhB)废水。同时采用N2吸附/脱附、XRD、XPS等手段对复合材料的孔结构和表面性质进行了表征。结果表明:氮元素的引入可改善复合材料中活性金属与活性炭之间的相互作用,从而提高复合材料的催化活性。以最优复合材料60%GZ/AC-N800为研究对象,在反应温度为35℃、PS加量为2 g/L和宽pH(3~11)操作条件下,反应30 min后罗丹明B(100 mg/L)的去除率可达88.7%~92.2%。动力学分析发现,60%GZ/AC-N800复合材料催化PS降解RhB符合准二级动力学。自由基掩蔽实验发现,该降解过程是自由基途径(SO_(4)^(·-)和·OH)和非自由基途径(^(1)O_(2))共同参与反应的氧化过程。In order to improve the resource utilization of steel slag and further degrade organic pollutants,a series of steel slag/nitrogen-doped modified activated carbon composites materials were prepared by changing the calcination temperature in ammonia and used to activate sodium persulfate to treat Rhodamine B wastewater.The pore structure and surface properties of the composites were characterized by N2 adsorption/desorption,XRD and XPS.The results showed that the introduction of nitrogen could improve the interaction between active metal and activated carbon in the composites,thus improving the catalytic activity of the composites.With the optimal composite 60%GZ/ACN800 as the research object,under the condition temperature 35℃,2 g/L PS and wide pH(3-11),the removal rate of Rhodamine B(100 mg/L)could reach 88.7%-92.2% after 30 min.The kinetic analysis showed that 60%GZ/ACN800 composite catalyzed the degradation of RhB by PS in line with the quasi-second-order kinetics.Free radical masking experiments showed that the degradation process was an oxidation process involving both free radical pathways(SO_(4)^(·-)and ·OH)and non-free radical pathways(^(1)O_(2)).

关 键 词：钢渣 活性炭 氮掺杂 罗丹明B 过硫酸盐 

分 类 号：X426[环境科学与工程—灾害防治]