Open AccessRemoval of Paracetamol from Wastewater by Calcined Gypsum: Adsorption and Kinetics Study
Author(s) -
Hossam Ibrahim Al-Itawi
Publication year - 2020
Publication title -
jordanian journal of engineering and chemical industries
Language(s) - English
Resource type - Journals
eISSN - 2617-720X
pISSN - 2616-9584
DOI - 10.48103/jjeci322020
Subject(s) - gypsum , calcination , adsorption , aqueous solution , endothermic process , chemistry , kinetics , wastewater , recrystallization (geology) , inorganic chemistry , nuclear chemistry , chemical engineering , materials science , waste management , metallurgy , catalysis , organic chemistry , geology , paleontology , physics , quantum mechanics , engineering
It has been established that the presence of paracetamol in wastewaters can cause a potential risk to the environment. Thiswork examined the possibility of using calcined gypsum in removing paracetamol from aqueous solutions. At neutral pHconditions, calcined gypsum was successful in removing paracetamol via adsorption, from aqueous solutions with a removalefficiency that ranged between 56.8 to 65.3 % of an initial concentration of 600 ppm. Increased temperature (from 20 to 500C)had a minor effect on the removal % of paracetamol while increasing the initial calcined gypsum dose (from 0.5 gm to 3 gm)and contact time (up to 15 min) increased by the removal % of paracetamol. Thermodynamically, the adsorption ofparacetamol by calcined gypsum process was found to be spontaneous and endothermic, and more likely a physical process,while kinetically; the Pseudo-Second order model was found to be the best fit compared to the Elovich model. The removalprocess mainly consists of two stages, and it could be deduced from the kinetic behavior of paracetamol adsorption that therecrystallization process can be another rate-limiting step in the process.