Application of optimized large surface area date stone (Phoenix dactylifera ) activated carbon for rhodamin B removal from aqueous solution: Box-Behnken design approach.
Box-Behnken model of response surface methodology was used to study the effect of adsorption process parameters for Rhodamine B (RhB) removal from aqueous solution through optimized large surface area date stone activated carbon. The set experiments with three input parameters such as time (10-600min), adsorbent dosage (0.5-10g/L) and temperature (25-50°C) were considered for statistical significance. The adequate relation was found between the input variables and response (removal percentage of RhB) and Fisher values (F- values) along with P-values suggesting the significance of various term coefficients. At an optimum adsorbent dose of 0.53g/L, time 593min and temperature 46.20°C, the adsorption capacity of 210mg/g was attained with maximum desirability. The negative values of Gibb's free energy (ΔG) predicted spontaneity and feasibility of adsorption; whereas, positive Enthalpy change (ΔH) confirmed endothermic adsorption of RhB onto optimized large surface area date stone activated carbons (OLSADS-AC). The adsorption data were found to be the best fit on the Langmuir model supporting monolayer type of adsorption of RhB with maximum monolayer layer adsorption capacity of 196.08mg/g.
Malaysian Institute of Chemical and Bioengineering Technology, Universiti Kuala Lumpur, Alor Gajah, 78000, Melaka, Malaysia. Electronic address: mdanishchem@gmail.com.
Mohammed
M
Danish
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
Waheed Ahmad
WA
Khanday
Bioresource Research Laboratory, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia.
Rokiah
R
Hashim
Bioresource Research Laboratory, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia.
Nurul Syuhada Binti
NS
Sulaiman
School of Electrical and Electronics, Universiti Sains Malaysia, Nibong Tebal, Penang 14300, Malaysia.
Mohammad Nishat
MN
Akhtar
Australian Laboratory Services Arabia Co. LTD, P.O. Box 9692, Dammam 31423, Saudi Arabia.
Maniruddin
M
Nizami
D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008956:Models, Chemical; D065749:Phoeniceae; D012235:Rhodamines / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D005456:Fluorescent Dyes; D012235:Rhodamines; D014874:Water Pollutants, Chemical; D002606:Charcoal; C029773:rhodamine B
Acacia mangium wood; Activated carbon; Adsorption; Box-Behnken model; Rhodamine B