废菌渣活性炭的制备及对废水中硝基苯的吸附

doi:10.16085/j.issn.1000-6613.2020-0153

化工进展 ›› 2020, Vol. 39 ›› Issue (11): 4702-4707.DOI: 10.16085/j.issn.1000-6613.2020-0153

废菌渣活性炭的制备及对废水中硝基苯的吸附

李红艳¹^,²(), 严铁尉¹^,²(), 崔建国¹^,², 张峰¹^,², 王芳³, 李尚明⁴

^1.太原理工大学环境科学与工程学院，山西晋中 030600
^2.山西省市政工程研究生教育创新中心，山西晋中 030600
^3.山西省生物研究院有限公司食用菌研究中心，山西太原 030006
^4.太原理工大学材料科学与工程学院，山西太原 030024

出版日期:2020-11-05 发布日期:2020-11-06
通讯作者: 严铁尉
作者简介:李红艳（1975—），女，副教授，硕士生导师，研究方向为水处理与能源资源化。E-mail：lhy3162@126.com。
基金资助:
山西省重点研发计划（社会发展领域）(201803D31046);山西省研究生联合培养基地人才培养项目(2018JD19);山西省科技成果转化引导专项(201904D131065)

Preparation of mushroom residue activated carbon and its adsorption mechanism of nitrobenzene in waste water

Hongyan LI¹^,²(), Tiewei YAN¹^,²(), Jianguo CUI¹^,², Feng ZHANG¹^,², Fang WANG³, Shangming LI⁴

^1.College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, Shanxi, China
^2.Shanxi Municipal Engineering Graduate Education Innovation Center, Jinzhong 030600, Shanxi, China
^3.Research Center for Edible Fungi, Biological Institute of Shanxi Province, Taiyuan 030006, Shanxi, China
^4.College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

Online:2020-11-05 Published:2020-11-06
Contact: Tiewei YAN

摘要/Abstract

摘要：

以废菌渣为原料制备活性炭，采用能量-色散光谱（EDS）和傅里叶变换红外光谱仪（FTIR）进行表征，结果表明：活性炭表面具有多种官能团，有利于提高对硝基苯的吸附。并研究了活性炭吸附硝基苯的影响因素（pH、初始浓度、吸附时间、投加量）、吸附等温线及热力学。结果表明：在常温中性pH条件下，初始浓度为50mg/L，活性炭用量为0.15g时硝基苯去除率可达98%，出水水质满足《污水综合排放标准》（GB 8978－1996）中对硝基苯浓度低于2.0mg/L的要求。活性炭对硝基苯的吸附具有较快的吸附速率，即1min接近平衡。该吸附行为是自发放热反应，可以用Freundlich模型很好地拟合。废菌渣活性炭对硝基苯的吸附主要是疏水作用和氧化钼活化共同作用的结果。因此，以农业废弃物-废菌渣制备得到的废菌渣活性炭具有良好的经济实用性，可用于废水处理中，实现以废治废的目的。

关键词: 废菌渣, 活性炭, 吸附, 硝基苯, 机理

Abstract:

Mushroom residue as precursor was used to produce activated carbon. Using the energy-dispersion spectroscopy (EDS) and Fourier transform infrared spectrometer (FTIR) for characterization, the results reveal the surface of the activated carbon is rich in various functional groups to improve the adsorption of nitrobenzene. The factors affecting the adsorption of nitrobenzene (pH, initial concentration, adsorption time, and dosage of activated carbon), adsorption isotherms and thermodynamics were studied. The results show that the removal rate of nitrobenzene is as high as 98% under the conditions of neutral pH, normal temperature, the initial concentration 50mg/L and the activated carbon dosage 0.15g. The effluent water quality meets the requirement for the nitrobenzene concentration below 2.0mg/L in the Integrated Wastewater Discharge Standard (GB 8978－1996). In addition, the adsorption of nitrobenzene by activated carbon has a fast adsorption rate, which is close to equilibrium in 1min. The adsorption behavior is a spontaneous exothermic reaction, which can be well fitted by Freundlich model. The adsorption of nitrobenzene by mushroom residue activated carbon is mainly the result of the combined action of hydrophobicity and molybdenum oxide activation. Therefore, the mushroom residue activated carbon prepared from agricultural waste has a good economic practicality, and can be used in wastewater treatment to achieve the purpose of treating waste with waste.

Key words: mushroom residue, activated carbon, adsorption, nitrobenzene, mechanism

中图分类号:

X523

李红艳, 严铁尉, 崔建国, 张峰, 王芳, 李尚明. 废菌渣活性炭的制备及对废水中硝基苯的吸附[J]. 化工进展, 2020, 39(11): 4702-4707.

Hongyan LI, Tiewei YAN, Jianguo CUI, Feng ZHANG, Fang WANG, Shangming LI. Preparation of mushroom residue activated carbon and its adsorption mechanism of nitrobenzene in waste water[J]. Chemical Industry and Engineering Progress, 2020, 39(11): 4702-4707.

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废菌渣活性炭的制备及对废水中硝基苯的吸附

Preparation of mushroom residue activated carbon and its adsorption mechanism of nitrobenzene in waste water

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