制药污泥热解制备生物炭及对制药废水的吸附处理性能分析

吴钦岳; 刘和; 郑炜; 刘宏波; 郑志永; 张衍; 张翠翠

doi:10.13205/j.hjgc.202111013

制药污泥热解制备生物炭及对制药废水的吸附处理性能分析

doi: 10.13205/j.hjgc.202111013

吴钦岳¹,
刘和^1,2,
郑炜³,
刘宏波^1,2,
郑志永^1,2,
张衍^1,2, ,,
张翠翠⁴

1. 江南大学环境与土木工程学院江苏省厌氧生物技术重点实验室, 江苏无锡 214122;
2. 江苏省水处理技术与材料协同创新中心, 苏州 215011;
3. 浙江清华长三角研究院生态环境研究所, 浙江嘉兴 314006;
4. 浙江双益环保科技发展有限公司, 浙江嘉兴 314000

基金项目:

浙江省重点研发计划（2019C03106）；国家自然科学基金（51938001）。

详细信息

作者简介:
吴钦岳(1996-),男,硕士生,主要研究方向为有机固废资源化处理。wuqinyuejn@126.com

通讯作者:
张衍(1984-),男,副研究员,主要研究方向为有机固废资源化处理。yanzhang@jiangnan.edu.cn

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出版历程
- 收稿日期: 2021-07-15
- 网络出版日期: 2022-01-26

PREPARATION OF BIOCHAR BY PYROLYSIS OF PHARMACEUTICAL SLUDGE AND ITS ADSORPTION PERFORMANCE IN TREATING PHARMACEUTICAL WASTEWATER

1. Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou 215011, China;
3. Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University Zhejiang, Jiaxing 314006, China;
4. Envirtecs Water and Wastewater Technology Company, Jiaxing 314000, China

摘要

摘要: 利用制药污泥热解制备生物炭，考察ZnCl₂活化条件对生物炭吸附性能的影响，并探究生物炭对制药废水的吸附处理特性。提高ZnCl₂活化剂的浓度和浸渍比均可提升制药污泥生物炭的吸附性能，5 mol/L ZnCl₂活化剂在1：1浸渍比下获得的生物炭的比表面积达到534.91 m²/g，碘吸附值和苯酚吸附值分别达到674.61，119.12 mg/g。制药污泥生物炭对制药废水COD吸附动力学与叶洛维奇模型和拟二级吸附动力学模型较为相符，1 h内为生物炭对COD的快速吸附阶段。制药污泥生物炭投加量的提升，可提高废水中污染物去除率，在50 g/L生物炭投加量下吸附1 h，可实现66.3% COD和61.8%可吸附有机卤素（AOX）的去除。而多级吸附可在较低投加量下实现更好的污染物去除效果，1 g/L投加量下进行6级吸附可去除72.8%的COD和65.2%的AOX。这揭示了制药污泥在ZnCl₂活化条件下热解可制备高吸附性能生物炭，并展现了出色的制药废水吸附处理效果。
- 生物炭 /
- 制药污泥 /
- 制药废水 /
- 吸附 /
- 可吸附有机卤素
Abstract: This study adopted pyrolysis to prepare biochar from pharmaceutical sludge, investigated the influence of ZnCl₂ activation conditions on the adsorption performance of biochar, and explored its performance in pharmaceutical wastewater treatment. Increasing the concentration and impregnation ratio of ZnCl₂ activator improved the adsorption performance of pharmaceutical sludge biochar. The specific surface area of biochar reached 534.91 m²/g, and iodine value and phenol adsorption value reached 674.61 mg/g and 119.12 mg/g, respectively, under ZnCl₂ concentration of 5 mol/L and impregnation ratio of 1:1. The adsorption kinetics of COD in pharmaceutical wastewater by the pharmaceutical sludge biochar was more consistent with the Elovich model and the pseudo-second order model. The rapid adsorption of COD by the biochar occurred within 1 h. The increase in the dosage of biochar improved the removal of pollutants in wastewater. COD removal and AOX removal achieved 66.3% and 61.8%, respectively, by adsorption at 50 g/L biochar dosage for 1 h. The multi-stage adsorption could achieve better pollutant removal effect at a lower dosage, as the 6-stage adsorption at a biochar dosage of 1 g/L removed 72.8% of COD and 65.2% of AOX. The study revealed that pyrolysis of pharmaceutical sludge with ZnCl₂ activation could produce high quality biochar, which possessed excellent potential in pharmaceutical wastewater adsorption treatment.
- biochar /
- pharmaceutical sludge /
- pharmaceutical wastewater /
- adsorption /
- AOX

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