Adsorptive removal of Cr(VI) ions using nitrogen-doping activated carbon: influence of pH, kinetics, isotherm models, optimization, and efficiency evaluation
Mohamed A El Nemr, Hossam S Jahin, Mohamed H H Abbas, Mohamed A Hassaan, Mohamed N M Ismail, Ahmed El Nemr · 2026
Read Adsorptive removal of Cr(VI) ions using nitrogen-doping activated carbon: influence of pH, kinetics, isotherm models, optimization, and efficiency evaluation by Mohamed A El Nemr, Hossam S Jahin, Mohamed H H Abbas, Mohamed A Hassaan, Mohamed N M Ismail, Ahmed El Nemr (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13260951.txt.
Description
Mohamed A El Nemr and colleagues present a 2026 study of removing hexavalent chromium, a highly toxic pollutant, from wastewater using nitrogen-doped activated carbon. The carbon, called AC600, was made by heating sawdust with zinc chloride at six hundred degrees. Batch experiments varied adsorbent dose, chromium concentration, and acidity from pH 1 to 12. The team fitted sorption models for equilibrium and speed, and used response surface methodology, a statistical optimization method, to tune conditions.
Removal rose quickly within the first twenty to forty minutes and reached equilibrium in about sixty to eighty minutes. Efficiency fell as acidity decreased. The best results, ninety-five to ninety-nine percent removal, used 2.5 grams of carbon per litre for water containing one hundred to 150 milligrams per litre of chromium within two hours. At higher chromium levels efficiency dropped to eighty-eight to ninety percent. Sorption data fitted the Freundlich and Temkin isotherm models well.
Catalog record
| CREATOR | Mohamed A El Nemr, Hossam S Jahin, Mohamed H H Abbas, Mohamed A Hassaan, Mohamed N M Ismail, Ahmed El Nemr |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 59003 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |