الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 176 |  |  |
| | | from | 176 | | |
Abstract
This work used nanoparticles of modified carboxymethyl cellulose (PCMC) and (SCMC) to remove the cationic dyes methylene blue and crystal violet from aqueous solutions under diverse operating parameters, including adsorbent quantity, pH, contact time, and temperature. FT-IR, SEM, TEM, and zeta potential characterize PCMC. TEM measured nanoparticles. The working parameters were examined, and the removal percentage increased with contact time and adsorbent, but the removal decreased with increasing dye concentration. However, a neutral pH removed both dyes the best. The results show that the maximum adsorption capacity of SCMC for the removal of MB and CV dyes are 45 mg/g and 43 mg/g, respectively. The the maximum adsorption capacity of PCMC for the removal of MB and CV dyes are 62 mg/g and 48 mg/g.
Adsorption pseudo-first-order kinetics. The Langmuir isotherm confirmed monolayer adsorption. The change in activation enthalpy (ΔH0), adsorption free energy (ΔG0), and entropy (ΔS0) were also calculated using temperature. Fundamental research will improve wastewater dye removal. Adsorption is endothermic because ΔH0 is positive. Adsorption increases unpredictability as the change in entropy (ΔS0) increases. The negative Gibbs free energy shift (ΔG0) suggests spontaneous adsorption. PCMC removed wastewater CV and MB dyes well.