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Feasible synthesis of coal fly ash based porous composites with multiscale pore structure and its application in Congo red adsorption

Sun, Guangchao1,2; Zhang, Jiayu1,2; Hao, Bianlei1,2; Li, Xiang1,2; Yan, Mingwei1,3; Liu, Kaiqi1,2,3
2022-07-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume298Pages:9
AbstractFacing the great challenge that the increasing solid waste fly ash is difficult to treat and utilize properly, this paper reports a class of novel low-cost fly ash porous materials with high interconnected porosity fabricated by a facile foaming process. On this basis, composites with multiscale pore structures from the nanometer to macroscopic scale were designed and constructed by decorating layered double hydroxide (LDH) onto the inner channel surface. Such porous materials with 3D through-hole structures showed high interconnected porosity (up to 77.61%), suitable compressive strength (up to 23.79 MPa) and significant water permeation flux (549.86 m(3).m(-2).h(-1) at 0.1 MPa). Moreover, the adsorption effect of dosage, initial concentration, pH, temperature and contact time on Congo red (CR) from simulated wastewater was investigated. The composites exhibited a good adsorption efficiency of -100% and adsorption capacities of 45.79 mg/g. The adsorption kinetic can be explained well by the pseudosecond-order kinetic equation and isotherm adsorption followed Langmuir isotherm model. This suggests that low-cost and eco-friendly fly ash composites have potential applications in industrial-scale wastewater treatment. This work also provides a general strategy to design and utilize fly ash porous materials for filtration and adsorption.
KeywordFly ash LDH Multiscale pore structure Epitaxial growth Adsorption
DOI10.1016/j.chemosphere.2022.134136
Language英语
WOS KeywordLAYERED DOUBLE HYDROXIDES ; EFFICIENT REMOVAL ; LDH ; EQUILIBRIUM ; MECHANISM ; CERAMICS ; POROSITY ; CAPACITY ; IONS ; DYES
Funding ProjectNational Key R&D Program of China[2019YFC1904300] ; National Natural Science Foundation of China[22005309] ; Fund of State Key Laboratory of Multiphase complex systems ; Key Research Program of Nanjing IPE Institute of Green Manufacturing Industry[E0010717]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Fund of State Key Laboratory of Multiphase complex systems ; Key Research Program of Nanjing IPE Institute of Green Manufacturing Industry
WOS IDWOS:000781348300002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52694
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Kaiqi
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Nanjing IPE Inst Green Mfg Ind, Nanjing 211135, Peoples R China
Recommended Citation
GB/T 7714
Sun, Guangchao,Zhang, Jiayu,Hao, Bianlei,et al.

Feasible synthesis of coal fly ash based porous composites with multiscale pore structure and its application in Congo red adsorption

[J]. CHEMOSPHERE,2022,298:9.
APA Sun, Guangchao,Zhang, Jiayu,Hao, Bianlei,Li, Xiang,Yan, Mingwei,&Liu, Kaiqi.(2022).

Feasible synthesis of coal fly ash based porous composites with multiscale pore structure and its application in Congo red adsorption

.CHEMOSPHERE,298,9.
MLA Sun, Guangchao,et al."

Feasible synthesis of coal fly ash based porous composites with multiscale pore structure and its application in Congo red adsorption

".CHEMOSPHERE 298(2022):9.
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