Clean water source is contaminated by industrial wastewater effluent which directly discharge into water stream. Combination of adsorption-photocatalytic is one of the preferable techniques for treating methylene blue (MB) dye wastewater. In this study, hydrothermal method was utilised in order to synthesis titanium oxide (TiO 2 ) nanoparticles. The synthesis of rGO was conducted by Hummer’s method by using lemon extract. Both...

This study aims to optimize the production of activated carbon from discarded disposable diapers (D3AC) using Box–Behnken design (BBD) under response surface methodology. Biochar (D3B) was initially produced via carbonization at 900 °C for 90 min under nitrogen flow, followed by physical activation with CO 2 . The BBD model demonstrated strong reliability (R 2 = 0.9972), effectively predicting the influence of activation tempe...