شماره ركورد كنفرانس :
5041
عنوان مقاله :
Removal of malachite green from aqueous solutions using chemically modified celery residue: Isotherm, kinetic and thermodynamic studies
Author/Authors :
S. Mohebali School of chemical and petroleum engineering - Sharif university of technology, Tehran, Iran , D. Bastani School of chemical and petroleum engineering - Sharif university of technology, Tehran, Iran
كليدواژه :
Adsorption , low-cost adsorbent , agricultural residue , malachite green , celery residue
عنوان كنفرانس :
The 10th International Chemical Engineering Congress & Exhibition (IChEC 2018)
چكيده فارسي :
فاقد چكيده فارسي
چكيده لاتين :
Celery residue modified with H2SO4 was utilized as a low-cost adsorbent for removal of hazardous malachite green cationic dye from aqueous solution in batch adsorption process. The efficacy of dye removal of the modified celery residue (MCR) was investigated by varying adsorbent dose, contact time, pH and initial dye concentration. The isotherm models analysis shows that the experimental data can be better described by Langmuir isotherm model. The maximum monolayer adsorption capacity of MCR achieved 526.316 mg/g at 303 K. The adsorption kinetic results were well described by the pseudo-second order model. Thermodynamic studies revealed that the adsorption process is spontaneous and exothermic in nature. The values of ΔH˚ and ΔS˚ have been determined to be negative which confirm that the adsorption process in more favourable in lower temperatures. Regeneration of adsorbent was evaluated and excellent results were obtained. The results of this study indicate that MCR is an effective low-cost adsorbent for removal of malachite green from aqueous solutions.
