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载铁活性炭对酸性嫩黄G的吸附机理

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  • 国家科技期刊平台
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  • NSTL
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为获得高效处理酸性嫩黄G(AYG)废水方法，采用浸渍法制备载铁活性炭(Fe-AC)作为吸附剂，并采用傅里叶红外光谱、扫描电镜及比表面积方法对改性前后活性炭进行表征分析。研究采用Box-Behnken Design响应面分析了各因素及其交互作用对AYG的去除影响，并探讨了Fe-AC吸附处理AYG的机理。结果表明:3 个因素对AYG去除影响的显著顺序为Fe-AC投加量>处理时间>pH。最佳处理条件:Fe-AC投加量为 9。51g/L、处理时间为 40。79 min、pH值为 4。23。Fe-AC吸附AYG遵循准二级动力学模型，反应速率常数为0。010 2～0。619 3 g/(mg·min)，吸附过程符合Temkin吸附等温模型。机理分析结果表明，Fe-AC含氧官能团增加，表面粗糙，比表面积及单点吸附总孔容增加，裂缝、凹陷丰富，存在多层吸附现象，为其吸附AYG提供了更多结合位点，更利于其与吸附质结合，增加其对AYG吸附量。
Mechanism of Iron-Loaded Activated Carbon for Adsorption of Acid Light Yellow G
In order to obtain an efficient treatment method for acid light yellow G(AYG)wastewater,iron-loaded activated carbon(Fe-AC)was prepared by impregnation method as adsorbent,and the activated carbon before and after modification was characterized and analyzed by FTIR,SEM and BET.The Box-Behnken Design response surface was used to analyze the effects of various factors and their interactions on AYG removal,and the mechanism of Fe-AC adsorption treatment of AYG was discussed.Results showed that the significant order of the effects of three factors on AYG removal was Fe-AC dosage>processing time>pH.Optimal treatment conditions:Fe-AC dosage was 9.51 g/L,treatment time was 40.79 min,and pH value was 4.23.Fe-AC adsorption AYG followed the pseudo-second-order kinetic model,the reaction rate constant was 0.010 2～0.619 3 g/(mg·min),and the adsorption process conformed to the Temkin adsorption isothermal model.Results of mechanism analysis showed that the oxygen-containing functional groups of Fe-AC increased,the surface was rough,the specific surface area and the total pore volume of single-point adsorption increased,cracks and depressions were abundant,and there were multi-layer adsorption phenomena,which provided more binding sites for its adsorption of AYG,which was more conducive to its combination with adsorbate and increased its adsorption capacity for AYG.

iron-loaded activated carbon(Fe-AC)acid light yellow G(AYG)characterization analysisresponse surface method(RSM)adsorption mechanism

赵博宇、张羽彤、姜宇彤、李晓悦、肖鹏飞、吴德东

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东北林业大学林学院,黑龙江哈尔滨 150040

载铁活性炭(Fe-AC) 酸性嫩黄G(AYG) 表征分析 响应面法(RSM) 吸附机理

黑龙江省生态环境保护科研项目黑龙江省大学生创新项目黑龙江省博士后基金

HST2022NC005S202210225358LBH-Z21085

2024

10.15890/j.cnki.jsjs.2024.05.015

净水技术
上海市净水技术学会,上海市城乡建设和交通委员会科学技术委员会办公室

净水技术

CSTPCD
影响因子：0.643
ISSN：1009-0177
年,卷(期)：2024.43(5)
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