粉煤灰基多孔陶瓷的制备及吸附性能研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (11): 4122-4130.

所属专题：陶瓷

粉煤灰基多孔陶瓷的制备及吸附性能研究

白利忠^1,2, 王超男^1,2, 程俊², 赵梓彤¹, 耿佳旺¹, 李雪峰¹

1.山西工程技术学院材料科学与工程系,阳泉 045000;
2.山西省阳泉市水文水资源勘测站,阳泉 045000

收稿日期:2023-06-01 修订日期:2023-07-10 出版日期:2023-11-15 发布日期:2023-11-22
作者简介:白利忠(1986—),男,博士,副教授。主要从事纳米功能复合材料的制备及应用研究。E-mail:lzbai@nuc.edu.cn
基金资助:
山西省高等学校科技创新项目(2021L583,2022L594);阳泉市自然科学基金(2022JH050,2022JH061)

Preparation and Adsorption Performance of Fly Ash Based Porous Ceramics

BAI Lizhong^1,2, WANG Chaonan^1,2, CHENG Jun², ZHAO Zitong¹, GENG Jiawang¹, LI Xuefeng¹

1. Materials Science and Engineering, Shanxi Institute of Technology, Yangquan 045000, China;
2. Yangquan Hydrology and Water Resources Survey Bureau of Shanxi Province, Yangquan 045000, China

Received:2023-06-01 Revised:2023-07-10 Online:2023-11-15 Published:2023-11-22

摘要/Abstract

摘要： 对粉煤灰基多孔陶瓷的有效利用不但能够减少粉煤灰对环境的污染,而且在废水处理等领域表现出较高的应用价值。本文以粉煤灰为主要原料,膨润土为黏结剂,活性炭为造孔剂,采用直接成型烧结工艺制备了一种性能优异的多孔陶瓷材料,并研究了烧结温度和活性炭用量对多孔陶瓷结构与性能的影响。结果表明,粉煤灰/膨润土烧结形成陶瓷骨架,活性炭氧化形成孔洞结构,在两者协同作用下形成多孔陶瓷材料。随着烧结温度的升高和活性炭用量的减少,多孔陶瓷材料的显气孔率和吸水率减小,体积密度和抗压强度增大。当烧结温度为1 100 ℃和活性炭用量为60%(质量分数)时,所制备的多孔陶瓷综合性能更优,显气孔率为61.75%,体积密度为0.93 g·cm^-3,吸水率为 63.48%,抗压强度为4.29 MPa,对浓度为100 mg·L^-1的Pb²⁺溶液的去除率为98.4%,饱和吸附量高达45.79 mg·g^-1。

关键词: 粉煤灰, 活性炭, 多孔陶瓷, Pb²⁺, 去除率, 吸附量

Abstract: The effective utilization of fly ash based porous ceramics can not only reduce the pollution of fly ash to the environment but also show high application value in wastewater treatment and other fields. In this paper, porous ceramics with excellent performance were prepared by direct molding sintering method with fly ash as the main raw material, bentonite as the binder and activated carbon as the pore forming agent. The effects of sintering temperature and activated carbon amount on the structures and properties of porous ceramics were studied. The results show that sintering fly ash and bentonite forms the porous ceramic skeleton, oxidized activated carbon forms the pores, and porous ceramics are formed under their synergetic effects. At the same time, with the increase of sintering temperature and the decrease of activated carbon amount, the apparent porosity and water absorption decrease, the bulk density and compressive strength increase. When the sintering temperature is 1 100 ℃ and the amount of the activated carbon is 60% (mass fraction), the prepared porous ceramics with good comprehensive performance can be prepared. Its apparent porosity is 61.75%, bulk density is 0.93 g·cm^-3, water absorption is 63.48%, compressive strength is 4.29 MPa. Moreover, its removal rate is 98.4% and the saturated adsorption capacity is 45.79 mg·g^-1 in the Pb²⁺ solution of 100 mg·L^-1.

Key words: fly ash, activated carbon, porous ceramics, Pb²⁺, removal rate, adsorption capacity

中图分类号:

TQ174

白利忠, 王超男, 程俊, 赵梓彤, 耿佳旺, 李雪峰. 粉煤灰基多孔陶瓷的制备及吸附性能研究[J]. 硅酸盐通报, 2023, 42(11): 4122-4130.

BAI Lizhong, WANG Chaonan, CHENG Jun, ZHAO Zitong, GENG Jiawang, LI Xuefeng. Preparation and Adsorption Performance of Fly Ash Based Porous Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 4122-4130.

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粉煤灰基多孔陶瓷的制备及吸附性能研究

Preparation and Adsorption Performance of Fly Ash Based Porous Ceramics

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