Batch and fixed bed adsorption of methylene blue onto foamed metakaolin-based geopolymer: A preliminary investigation

被引：24

作者：

Candamano, S. ^{[1
]}

Coppola, G. ^{[2
]}

Mazza, A. ^{[1
]}

Caranqui, J. I. Caicho ^{[3
]}

Bhattacharyya, S. ^{[2
]}

Chakraborty, S. ^{[2
]}

Alexis, F. ^{[4
]}

Algieri, C. ^{[5
]}

机构：

[1] Univ Calabria, Dept Mech Energy & Management Engn, I-87036 Arcavacata Di Rende, CS, Italy

[2] Univ Calabria, Dept DIMES, Via Pietro Bucci,Cubo 42A, I-87036 Arcavacata Di Rende, Italy

[3] Yachay Tech Univ, Sch Biol Sci & Engn, San Miguel De Urcuqui, Ecuador

[4] Univ San Francisco Quito, Colegio Ciencias & Ingn, Edificio Maxwell M-218, Quito, Ecuador

[5] Natl Res Council Italy ITM CNR, Inst Membrane Technol, Cubo 17C,Via Pietro Bucci, I-87036 Arcavacata Di Rende, Italy

来源：

CHEMICAL ENGINEERING RESEARCH & DESIGN | 2023年 / 197卷

关键词：

Foamed geopolymer; Granular fixed bed; Adsorption; Methylene blue; Kinetics; Adsorption isotherms; ASH-BASED GEOPOLYMER; AQUEOUS-SOLUTION; FLY-ASH; DYE REMOVAL; HEAVY-METALS; COLUMN; EQUILIBRIUM; PERFORMANCE; SURFACTANT; KINETICS;

D O I：

10.1016/j.cherd.2023.08.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Synthetic dyes, represent a serious hazard for the aquatic environments and groundwater system. The removal of dyes by the adsorption process avoids the production of sludge and secondary toxic compounds and offers high efficiency and very short operational times. In the present work, cationic Methylene Blue (MB) dye was used as a model pol-lutant to investigate the adsorption properties of a foamed geopolymer. The adsorbent has an apparent density of 0,75 g/cm3. It is characterized by a complex system of spherical and interconnected macro-pores with a mesopore volume of 0.143 cm3 /g that favors the mass transport and a pHpzc equal to 8.2. Batch and fixed granular bed column tests were carried out. The maximum MB uptake, in batch experiments, was 40.0 mg/g. Removal efficiency was around 95% up to a MB concentration of 25 mg/L. The pseudo second order kinetic model and Langmuir isotherm model better describe MB adsorption onto geopo-lymer. Fixed granular bed column tests were carried out by varying the initial dye con-centration at a constant flow rate and bed height. Results are better fitted by Yoon and Nelson model. The obtained results demonstrate that foamed geopolymers are good candidates for the removing MB from aqueous solutions.& COPY; 2023 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.

引用

页码：761 / 773

页数：13

共 61 条

[11] High-porosity geopolymer membrane supports by peroxide route with the addition of egg white as surfactant [J].