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亚甲基蓝污泥基吸附剂的制备及其性能评价
陈爽1,郑宛镧1,顾婧2,娄国生3,王艺1
(1.中国石油大学(华东)重质油国家重点实验室,山东青岛 266580;2.中国石化石油工程设计有限公司,山东东营 257000;3.中国人民解放军91286部队)
摘要:
采用物理-化学活化法,研究以东营某污水厂剩余污泥为原料的污泥基活性炭制备工艺。结合热重分析(TGA)、比表面测试(BET)、孔径分布(BJH)和扫描电镜(SEM)等表征方法,考察不同工艺条件下污泥基活性炭孔道结构的变化,将此活性炭作为有机染料废水吸附剂进行亚甲基蓝去除效果实验。结果表明:以3 mol/L氯化锌溶液为活化剂,在炭化温度550 ℃、炭化时间60 min、HCl浓度为2 mol/L酸洗的最佳工艺条件下,制备的污泥基活性炭比表面积高达1 800.11 m2/g,平均孔径3.862 nm;该活性炭孔道丰富,孔结构分布广泛,以微孔为主,所占比例达81.63%;污泥基活性炭对亚甲基蓝具有良好的去除效果,可应用于有机染料废水处理工艺中。
关键词:  污泥基活性炭  物理-化学活化法  亚甲基蓝值
DOI:10.3969/j.issn.1673-5005.2021.02.021
分类号::X 703
文献标识码:A
基金项目:
Preparation and performance evaluation of methylene blue sludge-based adsorbent
CHEN Shuang1, ZHENG Wanlan1, GU Jing2, LOU Guosheng3, WANG Yi1
(1.State Key Laboratory of Heavy Oil Processing in China University of Petroleum (East China), Qingdao 266580, China;2.Petroleum Engineering Design Company Limited, SINOPEC, Dongying 257000, China;3. PLA 91286 Unit, China)
Abstract:
The preparation process of sludge-based carbon from excess sludge of a wastewater treatment plant in Dongying was studied by physical-chemical activation method. The porous structure change of sludge-based carbon under different process conditions was investigated with TGA, BET, BJH and SEM. Then, this carbon was applied in removing test of methylene blue (MB) in dye pollutants. The results indicate that the optimal conditions are 3 mol/L ZnCl2 as an activator, 550 ℃ carbonization temperature with carbonization time of 60 min, and 2 mol/L of HCl. As a consequence, the BET surface area of activated sludge prepared by activated sludge is as high as 1 800.11 m2/g and the average diameter is 3.862 nm. It is found that the activated carbon has rich pore channels and widely distributed pore structure, with micropores as the main pore, accounting for 81.63%. Also, sludge-based activated carbon presents good removal effect on methylene blue, and can be used in organic dye wastewater treatment process.
Key words:  sludge-based carbon  physical-chemical activation method  methylene blue
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