Batik industrial textile waste water effluent if improperly disposed to the catchment can cause the water pollution that will endanger human health and the environment. The contaminants discharge in the dye processing causes the water pollution. Banana peel is a potential agriculture waste that can be used to reduce the concentration of color from synthetic dye effluents. This study is aim to determine the potential of banana peel as agricultural waste adsorbent for Methylene Blue (MB) removal at different contact time (15minutes, 30 minutes, 45 minutes, 90 minutes, 120 minutes, 150 minutes, and 180 minutes) and different adsorbent dosage (0.05, 0.1, 0.15, 0.2, 0.25, 0.3, and 0.4 gram) and to develop kinetic model for Methylene Blue (MB) removal. The experiments were conducted at room temperature using batch study. As the banana peel dosage is added from 0.05 g to 0.4 g in 100 ml of Methylene Blue solution, the percentage of MB solution removal also increase from 34.69 % to 86.88 %, indeed due to the increase in phenolic compounds adsorption rates. The adsorption process reached the optimum contact time at 150 minutes with MB solution removal of 86.22 %. The kinetic data obtained specified that the data follow closely the pseudo-second-order. It is concluded that banana peel can act effectively as natural adsorbent in treating Methylene Blue (MB) from batik textile wastewater effluents.

In this study, tea waste (TW) is investigated as a low cost adsorbent for the treatment of Mn(II) and Zn(II) in synthetic wastewater. Experimental design, the variables are the adsorbent dosage (0.5g, 1.0g, 1.5g, 2.0g, 2.5g and 3.0g) and contact time (20, 40, 60, 80, 100 and 120 minutes). The percentage of heavy metal ions removal in the solution are measured using DR2800 Spectrophotometer. Adsorption Isotherm and Adsorption Kinetic modelling are applied to further prove the correlation of the experimental data obtained for the removal of Mn(II) and Zn(II). The equilibrium data satisfactorily fitted into Langmuir Isotherm model for both Mn(II) and Zn(II) with R2 value of 0.9906 and 0.9854, respectively. Based on the result, TW is capable to adsorb more than 90% of both Mn(II) and Zn(II) at optimum dosage of 2g/100ml. The kinetic studies show that the absorption mechanisms satisfied the Pseudo-Second-Order model and have the best equilibrium data with R2 value of 0.9998 and 1.0000 for Mn(II) and Zn(II), respectively. The maximum adsorption achieved at 60 minutes for Mn(II) and 80 minutes for Zn(II). Thus, the Langmuir Isotherm and Pseudo-Second-Order Kinetic models proved that TW is capable of being an efficient and effective adsorbent for Mn(II) and Zn(II) removal in synthetic wastewater.

No abstract