Adsorption equilibrium, kinetics and thermodynamics of Rhodamine B dye from aqueous solution using Iraqi Porcellanite rocks

Abstract

Industrial wastewater and other polluted water need to be treated to make it possible to discharge into rivers and reuse them. Adsorption takes the importance of ways to remove organic and inorganic pollutants in water. The search for materials that are locally available and cheap to use as adsorbent surfaces. The Iraqiporcellanite powder can be used to remove the dye of Rhodamine B in batch method. The effect of various experimental parameters such as contact time, temperature, solution pH, weight of adsorbent initial dye concentration, ionic strength were investigated. The adsorption studies included both equilibrium adsorption isotherms and kinetics. The applicability of Langmuir and Freundlich equations was investigated at different temperature, and the Freundlich isotherm exhibited the best fit with experimental data. The thermodynamic parameters indicated that the adsorption was a spontaneous process (ΔG was negative), the negative value of ΔH indicate endothermic and ΔS was positive value (random), the kinetic data well described by Pseudo-second order kinetic model with intra particle diffusion as one of the rate limitring steps.

Study the characteristics of porcellanite rocks and applied as a sorbent for removing crude oil

“…The results shown in Figure 6 confirmed that there was a slight difference in the oil sorption capacity with particle size decreased. According to previously published studies, sorbents with smaller particle size have a higher sorption capacity due to their higher surface area (Al-Jammal and Juzsakova 2016; Abood and Jassim 2018; Al-Bidry and Azeez 2020). The current study found that porcellanite ability to sorb crude oil did not significantly change as particle size decreased.…”

“…The results reveal that Pb ions exhibit a strong affinity for adsorbing via porcellanite, where the maximum removal percentage reaches 95-98%. Abood and Jassim (2018), used Iraqi porcellanite to remove methylene blue in the batch method. The results showed that propellant has a very high adsorption capacity of 99.98% and the percentage of removal increases with increasing pH and temperature.…”

The possibility of using TiO2 Nanotube Arrays‏ ‏as an adsorbent for removing lead ions ‎from aqueous solutions

“…While the (ΔG) values were all negative, which means that the adsorption of Pb(II) on the surface of the studied titanium dioxide nanotubes is a spontaneous process. We also note that the negative value of (ΔG) increases with temperature increasing, meaning that the adsorption process becomes more automatic with increasing temperature (Kefi et al, 2017 ;Abood and Jassim, 2017).…”