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Abstract
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The easily separable and regenerable magnetic
activated carbon was s ynthesized for adsorption of t oxic
cationic dye, crystal violet, from aqueous solution. The s yn-thesized magnetic activated carbon was characterized by
SEM–EDX. The magnetic property of sorbent was evalu-ated by VSM method. The obtained saturation magnetization
of 41.56 emu g −1 showed facile separation of s orbent after
adsorption process. The eff ect of five parameters of pH, tem-perature, time, initial dye concentration and sorbent amount
on adsorption ( %) were investigated. The percentage of
adsorption was mathematically described as a f unction of
experimental parameters and was estimated by central com-posite design ( CCD). The maximum adsorption percent of
99.5 ± 0.2 was obtained experimentally which was close t o
the percent of CCD prediction of 99.90 %. The s ame design
was used f or a t hree-layer artificial neural network model
(ANN). The predicted data of CCD versus ANN showed the
linear agreement with regression value ( R 2 ) of 0.9994 which
confirmed t he ideality of CCD and ANN. The r esults of two
models were compared in terms of coefficient of determi-nation ( R 2 ) and mean absolute percentage error ( MAPE)
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