改性多孔兰炭末吸附处理模拟含铬废水

平松; 杨茸茸; 吴雷; 周军; 刘长波; 宋永辉; 岳昌盛; 田玮

doi:10.13205/j.hjgc.202302002

改性多孔兰炭末吸附处理模拟含铬废水

doi: 10.13205/j.hjgc.202302002

平松¹,
杨茸茸¹,
吴雷^2,3,
周军^2,3, ,,
刘长波⁴,
宋永辉^1,3,
岳昌盛⁴,
田玮⁴

1. 西安建筑科技大学冶金工程学院, 西安 710055;
2. 西安建筑科技大学化学与化工学院, 西安 710055;
3. 陕西省黄金与资源重点实验室, 西安 710055;
4. 钢铁工业环境保护国家重点实验室, 北京 100088

基金项目:

陕西省自然科学基础研究计划项目(2019JLP-17)

陕西省创新能力支撑计划(2020TD-028)

榆林市科技计划项目(CXY-2020-058)

碑林区科技计划项目(GX2133)

钢铁工业环境保护国家重点实验室开放基金课题(YZC2019ky01)

详细信息

作者简介:
平松(1997-),男,硕士研究生,主要研究方向为重金属废水综合治理。415896036@qq.com

通讯作者:
周军(1977-),男,教授,博士生导师,主要研究方向为低品位能源资源增值利用。xazhoujun@126.com

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- 文章访问数: 79
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出版历程
- 收稿日期: 2011-12-21
- 网络出版日期: 2023-05-25
- 刊出日期: 2023-02-01

ADSORPTION TREATMENT OF SIMULATIVE WASTEWATER CONTAINING CHROMIUM BY MODIFIED POROUS BLUECOKE POWDER

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. Key Laboratory of Gold and Resources of Shaanxi Province, Xi'an 710055, China;
4. State Key Laboratory of Iron & Steel Industry Environmental Protection, Beijing 100088, China

摘要

摘要: 以低值兰炭末为原料,通过酸洗和微波活化制备了改性多孔兰炭末(MA-BC),并对其吸附处理模拟含Cr(Ⅵ)废水进行了实验研究。采用SEM、N₂吸附-脱附测试和FT-IR等分析表征手段对比分析了改性前后兰炭末表面形貌、结构和官能团组成变化。在吸附处理模拟含Cr(Ⅵ)废水实验中,分别考察了MA-BC投加量、模拟废水pH、初始Cr(Ⅵ)浓度、吸附时间对模拟废水中Cr(Ⅵ)去除效果的影响,并对模拟废水中Cr(Ⅵ)吸附过程进行了动力学和热力学分析。结果表明:经酸洗微波加热活化处理的兰炭末比表面积增大到160.69 m²/g,改性后兰炭末表面的-OH、C[CDS1]C和-CH₃等官能团含量明显增加。在模拟废水Cr(Ⅵ)初始浓度为100 mg/L,pH为2,MA-BC投加量为2 g,吸附时间210 min的最佳工艺条件下,模拟废水中Cr(Ⅵ)去除率可达到89.21%。该吸附过程以化学吸附为主,服从准二级动力学方程,并符合Langmuir吸附等温线模型,理论吸附量为6.255 mg/g,与实验所测的平衡吸附量相吻合。吸附饱和的改性多孔兰炭末经5次循环再生-吸附,对模拟废水中Cr(Ⅵ)去除率仍保持在80%以上。
- 改性多孔兰炭末 /
- 含铬废水 /
- 吸附 /
- 动力学 /
- 热力学
Abstract: Using low-value blue coke as the raw material, modified porous bluecoke (MA-BC) was prepared by acid washing and microwave activation, and an experimental study on its adsorption treatment of simulated Cr(Ⅵ)-containing wastewater was carried out. The surface morphology and structure and functional groups of the bluecoke powder before and after the modification were compared and analyzed by BET, SEM, N₂ adsorption-desorption test, and FT-IR. In the treatment of the simulated Cr(Ⅵ)-containing wastewater, the dosage of MA-BC, simulated wastewater pH, initial concentration of Cr(Ⅵ), and adsorption time were investigated respectively, and the thermodynamics and kinetics for the adsorption process of Cr(Ⅵ) were analyzed. The results showed that the specific surface area of activated bluecoke powder by acid washing and microwave heating increased to 160.69 m²/g, and the content of functional groups, -OH, C=C and -CH₃ on the surface of MA-BC significantly increased. Under the optimal process condition that the initial concentration of Cr(Ⅵ) in the simulated wastewater was 100 mg/L, pH was 2, the MA-BC dosage was 2 g, the adsorption time was 210 min, and then the removal rate of Cr(Ⅵ) could reach 89.21%. The main adsorption process belonged to the chemical adsorption, which obeyed the pseudo-second-order kinetic equation and conformed to the Langmuir adsorption isotherm model. The theoretical adsorption capacity was 6.255 mg/g, which was consistent with the equilibrium adsorption capacity of the experiment. After 5 cycles of regeneration and adsorption, the removal rate of Cr(Ⅵ) in simulated wastewater absorbed by MA-BC remained 80% above.
- modified porous bluecoke powder /
- chromium-containing wastewater /
- adsorption /
- kinetic /
- thermodynamic

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