Abstract This present study was performed for the sorption of acid black 234 from water with the help of Acacia concinna powder and find out the greatest operating conditions for sorption of acid black 234 on Acacia concinna powder process at the laboratory scale. Several parameters such as initial dye concentration, sorbent dose and contact time were applied. The kinetic data obtained from different batch experiments were analyzed using both pseudo first-order and pseudo second-order equations. Results revealed pseudo second order model accurately explains the data because of high R2 value (0.9997). Elovich equation was also applied to study the kinetics, results endorsed that pseudo second order is the one to explain the kinetics of current process. Equilibrium study also performed to the sorption data by changing initial concentration of acid black 234 and removal was calculated to be 10-80 mgL-1. It was concluded that Langmuir isotherm accurately explains calculated data because of maximum value of R2 (0.9922).
Keywords Acid black 234, Shikakai powder, Kinetics, Isotherms.