粉煤灰多孔陶瓷制备及其吸附Cr(Ⅵ)性能  

Preparation of Fly Ash Porous Ceramics and Adsorption Performance of Cr(Ⅵ)

作　　者：王辉[1] 袁思杰 赵军[1] 郭庆杰[1,2] WANG Hui;YUAN Sijie;ZHAO Jun;GUO Qingjie(Key Laboratory of Clean Chemical Processing of Shandong Province,College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]青岛科技大学清洁化工过程山东省高校重点实验室,化工学院,山东青岛266042 [2]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021

出　　处：《青岛科技大学学报（自然科学版）》2022年第2期51-57,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：省部共建煤炭高校利用与绿色化工国家重点实验室开放基金项目(2018-K37);山东省优秀中青年科学家科研奖励基金项目(BS2014CL011).

摘　　要：以粉煤灰为基体材料,用碳酸钠(Na_(2)CO_(3))为造孔剂,氢氧化钠做助熔剂,混合均匀后经压片成型,在马弗炉中经高温煅烧得多孔陶瓷。研究了碳酸钠含量以及煅烧温度,对陶瓷孔隙率和强度的影响,以及制备的粉煤灰多孔陶瓷对Cr(Ⅵ)的吸附性能的影响。研究结果表明:煅烧温度为800℃,造孔剂含量为15%,所制备的粉煤灰多孔陶瓷的孔隙率为40.28%,抗压强度为8.1MPa,陶瓷片的饱和吸附时间为200min,对0.06006g·L^(-1)的重铬酸钾溶液中Cr(Ⅵ)的去除率为71.36%,吸附能力达0.757mg·g^(-1)。研究发现,粉煤灰陶瓷的吸附位点主要是-SiO_(3)^(2-),陶瓷片经3次吸脱附后Cr(Ⅵ)去除率仍可达到45%左右。The porous ceramic is prepared with fly ash as the matrix material,Na_(2)CO_(3)as the pore-forming agent,NaOH as fluxing agent after compression moulding and sintered under high-temperature calcination in a muffle furnace.The effects of Na_(2)CO_(3)content and calcina-tion temperature on the porosity and strength of ceramics were investigated.And the adsorp-tion properties of the prepared fly ash porous ceramics on Cr(Ⅵ)studied.The results show that when the calcination temperature is 800℃and the pore former content is 15%,the pre-pared fly ash porous ceramic has a porosity of 40.28%and a compressive strength of 8.1 MPa.The Cr(Ⅵ)removal rate of ceramic sheet is 71.36%in 0.06006g·L^(-1) K2Cr2O7so-lution,and the adsorption capacity can reach 0.757mg·g^(-1) after 200min of saturation ad-sorption.It is found that the amount of-SiO_(3)^(2-) played an important role in absorbing Cr(Ⅵ),The adsorption rate of ceramic sheets can still reach about 45%after three times of adsorption and desorption.

关 键 词：粉煤灰 多孔陶瓷 铬 吸附 

分 类 号：X703[环境科学与工程—环境工程]