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Trihalomethanes (THMs) known as undesirable contaminants which are obtained through the pre-chlorination method for water in water treatment processes done in stations. This study prepared low cost activated carbon produced by treatment of palm fronds by phosphoric acid. The activated carbon used to eliminate Trihalomethane (THM) .there are different variables were studied like pH, residence time, adsorbent dose, temperature and initial concentration. The results show that removal percentage of Trihalomethane and capacity of adsorption decreased with increased of pH. Kinetic studies showed that pseudo-second-order reaction model is greatest describe the adsorption process where the values of correlation coefficient, R2, for the pseudo-second order adsorption model is relatively high (>0.9979). The study show ΔG° has a negative value that referred to the feasibility and spontaneity of adsorption process. The study also

Specific objective for this study was to stabilize a valid method to remove copper from recycled formation water from oil field. Chitosan used for Cu+ 2adsorption from simulated wastewater. Comparison between commercial (CC) and natural prepared chitosan (NC) from shrimps shell, also CC and NC was grafted for enhancing the efficiency of remove tested metal ions. By studying removal of Cu+ 2 across certain parameters as concentration, adsorbent dose, contact time and pH. The results summarized that maximum % removal for all types used was at 20 ppm with value of 94% for CC and NC ,96% for CGC and 98% for NGC after 3hr, 1g and pH = 7. While reaches about 99% removals by increasing adsorbent dose to 4 g for NGC and CGC. Different adsorption isotherms were studied for the remove of Cu+ 2 ions. Also the rate of Adsorption for different types of chitosan used was pseudo 1st order, pseudo 2nd order and Elvoich equation. The kinetic data were analyzed by the intra-particle diffusion model and liquid film diffusion model for Cu+ 2 adsorption using different types of chitosan to study the mechanism of reaction for each type. Significantly, in order to scale up this effective technique on an industrial scale, response surface methodology (RSM) as a modelling tool Statistical Software for further copper ion removal used. The DFT using B3LYP and utilized with 6- 311G* correlation function applied for investigated probs. DFT, and MEPs, also, used to identify the interaction compounds behavior over heavy metal for formation water.