改性煤基固废A沸石对亚甲基蓝吸附性能研究  

Adsorption Properties of Modified Coal-based Solid Waste A Zeolite on Methylene Blue

作　　者：葛建华[1,2] 黄琼 马东坡 蒋琪雅 杨心茹 张世文[1,2] GE Jianhua;HUANG Qiong;MA Dongpo;JIANG Qiya;YANG Xinru;ZHANG Shiwen(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China;Laboratory of Comprehensive Utilization of Water and Soil Resources and EcologicalProtection Engineering in High Groundwater Level Mining Area of Anhui Province,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]安徽理工大学安徽省高潜水位矿区水土资源综合利用与生态保护工程实验室,安徽淮南232001

出　　处：《安徽理工大学学报(自然科学版)》2025年第1期11-23,共13页Journal of Anhui University of Science and Technology:Natural Science

基　　金：采煤地表沉陷区水面种植关键技术及模式研究与示范(HX2024012395);安徽省高潜水位矿区水土资源综合利用与生态保护工程实验室开放课题基金资助项目(2022-WSREPMA-03);安徽省高校优秀人才支持计划项目(gxyq2020012);安徽省自然科学基金资助项目(1808085ME139);淮北矿业集团科技研发基金资助项目(2022-113)。

摘　　要：目的为探究煤基沸石改性后对亚甲基蓝的吸附效果及其作用机制,探索改性前后沸石对亚甲基蓝染料的吸附能力及吸附机理,达到充分利用煤炭资源治理染料废水环境问题的目的。方法以煤矸石、粉煤灰、煤气化渣为原材料,采用水热-碱融法将其制备成A型煤矸石基沸石、粉煤灰基沸石、煤气化渣基沸石,并采用阴离子表面活性剂十二烷基硫酸钠对所制备的沸石进行改性,结合XRF、XRD、BET、SEM、FT-IR等技术手段进行表征。结果研究结果表明,用十二烷基硫酸钠改性后的3种沸石,对亚甲基蓝的吸附均符合准二级动力学模型;Freundlich等温线模型和Langmuir模型均能较好的拟合吸附;颗粒间扩散模型表明,吸附过程可分为表面扩散、孔内扩散和动态平衡3个阶段。改性前后的煤基A沸石经过5次再生循环后,对亚甲基蓝平衡吸附量仍高达原吸附量的80%左右。结论煤基固废可以成功制备成以介孔为主的A型沸石,并通过改性提高对亚甲基蓝的吸附性能。这一研究结果对于进一步探索煤基固废的绿色利用提供了理论依据。Objective To explore the adsorption effect and mechanism of the modified coal based zeolite on methylene blue,to discuss the adsorption capacity and mechanism of zeolite for methylene blue dye before and after modification and to fully utilize coal resources to treat dye wastewater environmental problems.Methods Coal gangue,fly ash and coal gasification slag were used as raw materials to prepare A-type coal gangue based zeolite,fly ash based zeolite,and coal gasification slag based zeolite by using the hydrothermal alkali fusion method.The prepared zeolites were modified with anionic surfactant sodium dodecyl sulfate,and characterized by XRF,XRD,BET,SEM,FT-IR and other techniques Results The research results showed that the adsorption to the methylene blue of the three zeolites modified with sodium dodecyl sulfate followed a quasi second order kinetic model.Both the Freundlich isotherm model and Langmuir model fitted the adsorption well.The interparticle diffusion model indicated that the adsorption process was divided into three stages,surface diffusion,pore diffusion and dynamic equilibrium.After 5 regeneration cycles,the equilibrium adsorption capacity to the methylene blue of the coal based zeolite A before and after modificationon were still as high as about 80%of the original adsorption capacity.Conclusion Coal based solid waste is able to be successfully prepared into A-type zeolite mainly composed of mesopores,with the improved adsorption performance to methylene blue after modification.This research result provides a theoretical basis for further exploring the green utilization of coal based solid waste.

关 键 词：煤基固废 改性沸石 亚甲基蓝 吸附性能 

分 类 号：X52[环境科学与工程—环境工程] X752