废瓦楞纸基磁性生物炭气凝胶的制备及其亚甲基蓝吸附性能  

MAGNETIC BIOCHAR AEROGEL FROM WASTE CORRUGATED PAPER FOR ADSORPTION OF METHYLENE BLUE FROM WATER:PREPAREATRION AND PERFORMANCE

作　　者：李志利 王海涛[1] 霍汉鑫 赵瑾 张艺钟 王勋亮 郭健 姜天翔 马宇辉 LI Zhili;WANG Haitao;HUO Hanxin;ZHAO Jin;ZHANG Yizhong;WANG Xunliang;GUO Jian;JIANG Tianxiang;MA Yuhui(School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;The Institute of Seawater Desalination and Multipurpose Utilization,Ministry of Natural Resources of the People's Republic of China,Tianjin 300192,China;Technical Centre for Soil,Agriculture and Rural Ecology and Environment,Ministry of Ecology and Environment of the People's Republic of China,Beijing 100012,China;Shandong Sihai Water Treatment Equipment Co.,Ltd.,Weifang 262500,China;Tianjin Haiyue Water Treatment High-Tech Co.,Ltd.,Tianjin 300192,China)

机构地区：[1]天津工业大学环境科学与工程学院,天津300387 [2]自然资源部天津海水淡化与综合利用研究所,天津300192 [3]生态环境部土壤与农业农村生态环境监管技术中心,北京100012 [4]山东四海水处理设备有限公司,山东潍坊262500 [5]天津市海跃水处理高科技有限公司,天津300192

出　　处：《环境工程》2024年第12期210-217,共8页Environmental Engineering

基　　金：中央级公益性科研院所基本科研业务专项资金“高分散纳米Fe3O4@石墨化多孔炭非均相Fenton催化材料制备和应用研究”(K-JBYWF-2021-ZT04)。

摘　　要：以废瓦楞纸为原料,通过简便的“破碎-FeCl_(3)/无水乙醇浸渍-常压干燥-炭化”工艺制备了一种新颖的磁性生物炭气凝胶(BCA_(Fe-600));对材料的微观形貌、表面元素组成、晶相结构、比表面积、表面官能团、机械强度、磁性、亲水性、Zeta电位进行了分析和比较;研究了BCA_(Fe-600)对水中亚甲基蓝(MB)的吸附等温线,并将其用作一种可磁回收的漂浮型吸附材料,模拟了其对MB污染水体的净化过程,明确了吸附动力学特征。结果表明:BCA_(Fe-600)由无序交错的条带状炭纤维构成,具有良好的亲水性,其主要晶相组成为无定形碳、磁赤铁矿(γ-Fe_(2)O_(3))和方解石(CaCO_(3));FeCl_(3)可以促进废瓦楞纸在热解炭化过程中的孔隙发育以及最终材料的机械强度,其最终分解产物γ-Fe_(2)O_(3)赋予材料良好的磁性,因此,BCA_(Fe-600)的比表面积和饱和磁化量达到205 m^(2)/g和7.62 emu/g,且可耐受自重450倍的压力。BCA_(Fe-600)对水中MB的吸附过程可用Langmuir模型描述,其最大单分子层吸附量为35.6 mg/g;BCA_(Fe-600)可漂浮于MB溶液中,在静置条件下对MB也具有显著的吸附去除作用,其吸附动力学符合拟二级动力学模型。A novel magnetic biochar aerogel(BCA_(Fe-600))was prepared from waste corrugated paper via crushing followed by impregnation with FeCl_(3)/ethanol solution and carbonization.The materials’morphology,elemental composition,crystal structure,surface area,surface functional groups,mechanical property,magnetic property,hydrophilicity,and Zeta potential were analyzed and compared.The adsorption isotherm of BCA_(Fe-600) for methylene blue was studied,and BCA_(Fe-600) was used as a magnetic separable and floatable adsorbent for the purification of the simulated methylene blue polluted natural water.The results showed that the hydrophilic BCA_(Fe-600) was composed of criss-crossed ribbon-like carbon fibers,and the main chemical constituents of BCA_(Fe-600) were amorphous carbon,maghemite,and calcite.The presence of FeCl_(3) benefited the evolution of porous structure and the mechanical strength of BCA_(Fe-600),and maghemite derived from FeCl_(3) gave magnetism to BCA_(Fe-600),possessing a BET surface area of 205 m^(2)/g and a saturated magnetization value of 7.62 emu/g.The Langmuir model was applicable for fitting the adsorption isotherm data for methylene blue with a maximum adsorption capacity of 35.6 mg/g,and the adsorption kinetics of methylene blue on the floatable BCA_(Fe-600) complied with pseudo-second-order kinetics model.

关 键 词：废瓦楞纸 磁性炭气凝胶 亚甲基蓝 吸附等温线 吸附动力学 

分 类 号：TB3[一般工业技术—材料科学与工程]