Malachite Green Adsorption by Spent Coffee Grounds

Malaysian Technical Universities Conference on Engineering and Technology 2017

Atirah Mat, Siti Syamimie^1 ; Syed Zuber, Sharifah Zati Hanani^1 ; Enche Ab Rahim, Siti Kartini^1 ; Ahmad Sohaimi, Khairunissa Syairah^1 ; Abdul Halim, Noor Amirah^1 ; Zainudin, Nor Fauziah^1 ; Yusoff, Nor Aida^1 ; Rohaizad, Nor Munirah^1 ; Ishak, Noor Hidayah^1 ; Anuar, Adilah^1 ; Sarip, Mohd Sharizan Md^1

Faculty of Engineering Technology, Universiti Malaysia Perlis, Sungai Chuchuh, 02100 Padang Besar, Perlis, Malaysia., Malaysia^1

关键词: Batch adsorption tests;    Correlation coefficient;    Equilibrium conditions;    Experimental parameters;    Initial concentration;    Low-cost adsorbents;    Pseudo second order kinetics;    Spent coffee grounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/318/1/012015/pdf
DOI  :  10.1088/1757-899X/318/1/012015

来源: IOP

【 摘 要 】

In this work, the ability of spent coffee grounds (SCG) as a low-cost adsorbent to remove malachite green (MG) from aqueous solutions was studied. Batch adsorption tests were carried out to observe the effect of various experimental parameters such as contact time, initial concentration of malachite green and adsorbent dosage on the removal of dye. The results obtained show that the percentage of dye removal will decreased with the increased of initial concentration of dye in the range of 50 mg/L to 250 mg/L. Besides, percentage removal of dye was also found to be increased as the contact time increased until it reached equilibrium condition. The results also showed that the adsorbent dosage in range of 0.2 g to 1.0 g is proportional to the percentage removal of malachite green dye. Study on the kinetic adsorption and isotherm adsorption has also been investigated. The adsorption isotherm data were described by Langmuir isotherm with high-correlation coefficients while the experimental data showed the pseudo-second-order kinetics model was the best model for the adsorption of MG by SCG with the coefficients of correlation R2> 0.9978.