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Experimental study and dynamic simulation of melanoidin adsorption from distillery effluent
- Source :
- Environmental Science and Pollution Research. 27:9619-9636
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- This work aims to utilize fly ash from a thermal power station for melanoidin reduction from distillery effluent by adsorption. To accomplish this, coal fly ash was modified through chemical treatment and was then tested for melanoidin adsorption as a function of various melanoidin concentrations, contact time, and pH. The specific novelty of this study is the evaluation of coal fly ash as a low-cost adsorbent for melanoidin removal. Furthermore, the simulation study was carried out using Aspen ADSIM software in order to optimize the commercial usage of the prepared adsorbent. The main results achieved include the maximum removal efficiency of 84% which was reached at initial melanoidin concentration of 1100 mg L−1 (5% dilution), pH 6, and a contact time of 120 min. The Langmuir and Freundlich isotherm models were used to evaluate adsorption isotherms. The maximum adsorption capacity of 281.34 mg/g was observed using the Langmuir isotherm. Furthermore, pseudo-first- and pseudo-second-order and intra-particle diffusion models were used to fit adsorption kinetic data. The pseudo-second-order was best describing the adsorption kinetic with a faster kinetic rate of 0.142 mg g–1 min−1. CFA (coal fly ash) after acidic activation resulted in a slightly higher surface area, average pore volume, and pore size. The maximum breakthrough time and adsorbent saturation time were achieved at initial melanoidin concentration of 1 mol/lit, bed height of 2.5 m, and flow rate of 50 lit/min.
- Subjects :
- Langmuir
Polymers
Health, Toxicology and Mutagenesis
010501 environmental sciences
Coal Ash
01 natural sciences
symbols.namesake
Adsorption
Environmental Chemistry
Freundlich equation
Effluent
0105 earth and related environmental sciences
Chemistry
Melanoidin
Langmuir adsorption model
General Medicine
Hydrogen-Ion Concentration
Pollution
Dilution
Kinetics
Coal
Chemical engineering
Fly ash
symbols
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 16147499 and 09441344
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Environmental Science and Pollution Research
- Accession number :
- edsair.doi.dedup.....ee0c4dcb7aadab59fadd524477aa78ad