Lead remediation was achieved using simple cost, effective and eco-friendly way from industrial wastewater. Phragmitesaustralis (P.a) (Iraqi plant), was used as anovel biomaterial to remove lead ions from synthesized waste water. Different parameters which affected on adsorption processes were investigated like adsorbent dose, pH, contact time, and adsorbent particle size, to reach the optimized conditions (maximum adsorption). The adsorption of Pb (?) on (P.a) involved fast and slow process as a mechanism steps according to obey two theoretical adsorption isotherms; Langmuir and Freundlich. The thermos dynamic adsorption parameters were evaluated also. The (?H) obtained positive value that meanes adsorption of lead ions was an endothermic processwhile (?G)values were negative which means that adsorption of lead ions was a spontaneous process and the decrease in (?G) with temperature increasing revealed that lead ions adsorption on (P.a) became favorable with temperature increasing

The adsorption of methyl violet dye onto Cresson (Lepidium sativum) seeds also known as Garden cress as an adsorbent from its aqueous solution has been carried out. The effect of experimental coefficient parameters like connection time, primary concentration of adsorbate (methyl violet) and amount of adsorbent dose and temperature were evaluated to obtain the optimum condition for adsorption of methyl violet onto Cresson seeds using batch adsorption. The adsorption information were mathematically analyzed using adsorption isotherms like Langmuir, Freundlich and Dubinin-Radushkevich isotherms in order to study adsorption mechanism of methyl violet dye onto Cresson seed. The isotherms of adsorption were advanced and equilibrium data adjusted well to Freundlich isotherm model. The kinetic studies indicated that the process of adsorption followed the model of second-order kinetic. The thermodynamic parameters (∆Gº, ∆Hº and ∆Sº) were estimated and the obtained negative value of ∆Gº indicate a spontaneous adsorption process, positive ∆Hº value obtained designate about the endothermic properties of adsorption process and positive ∆Sº value obtained during the adsorption indicated the increased randomness.

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In this work semi–empirical method (PM3) calculations are carried out by (MOPAC) computational packages have been employed to calculate the molecular orbital's energies for some organic pollutants. The long– chain quaternary ammonium cations called Iraqi Clays (Bentonite – modified) are used to remove these organic pollutants from water, by adding a small cationic surfactant so as to result in floes which are agglomerates of organobentonite to remove organic pollutants. This calculation which suggests the best surface active material, can be used to modify the adsorption efficiency of aniline , phenol, phenol deriviatives, Tri methyl glycine, ester and pecticides , on Iraqi Clay (bentonite) by comparing the theoretical results with experimental results achived in previous experimental studies between some organic pollutants and modified bentonite by (1- Hexadecyl pyridinium bromide) (HDPYBr). The theoretical calculation is made by using three surface active materials [1- (Hexadecyl pyridinium bromide) (HDPYBr), (1,12- Dipyridiniododecane dibromide) (DPYDDBr2) and Hexadecyl trimethyl ammonium bromide (HDTMA)]. Using (HDTMA) leads to the best adsorption efficiency for most pollutants involved in this study. The enthalpy of formations, dipole and energy of molecular orbitale HOMO and LUMO energies levels are calculated for all pollutants and the three surface active materials.

Objective: Chelating therapy is a medical procedure that involves the administration of chelating agents to remove heavy metals from the body; chelating agents detoxify heavy metals and toxins, converting them to inactive forms which were excreted out from the body. This work demonstrates the complication of the drug with toxic heavy metal lead (Π) ion. Methods: All the experiments were performed at different temperature (303, 308, 313, 318, and 323) °K, by spectrophotometric method. The electronic spectra of the mixture of drug and lead ion show a bathochromic (red) shift in ʎmax, the absorbance change caused by a complex arrangement between the lead ion and drug. Results: The stoichiometry of the complex formed was calculated using continuous variation method, it was found (1:2) that the durability constant was estimated that the standard thermodynamic parameters ΔH°, ΔG°, and ΔS° were determined, the negative values of free energy changes ΔG° indicate a spontaneous complexation process. The positive values of enthalpy change indicate an endothermic process with an increase in entropy change ΔS° (positive), that means the process in an entropy driven. Conclusion: The kinetic studies of the complexation of drug and ion were found to follow the second-order reaction, which was confined by the straight line and a high rate constant.