a b s t r a c tElectrocoagulation (EC) is known as an environmentally friendly technology for treatment of water or wastewater through a combination process of coagulation, oxidation and flotation. The rapid development of industry and agriculture, as well as the ineffective disposal of waste, may lead to a substantial increase in the loadings of water treatment. EC can be used for treatment of different types of water such as tannery and dyeing wastewater, organic wastewater, sewage, drinking water and heavy metal wastewater. An effective EC reactor system can show a good treatment efficiency but it requires a good design and operation of EC. Recently, the EC has been developed rapidly toward development of new electrodes and applicable operation modes, and thus more efficient EC systems for treatment of various water pollutants have emerged. In the present work, a brief overview of the recent research dealing with the application of electrodes and the coupling processes of EC with other technologies are presented.

Polymerization of dimethyl diallyl ammonium chloride and acrylamide (PDA) has been formed by using industrial dimethyl diallyl ammonium chloride (DMDAAC) and industrial acrylamide (AM) initiated by K2S2O8-NaHSO3. The effect of reaction variables such as concentration of the reactants, reactants ratio, dosage of EDTA and reaction time were investigated and the product was detected and characterized with IR spectroscopy and thermo gravimetric analysis. The DBP removal efficiency by PDA was investigated. In the batch mode of studies, the pH value and effect of the intrinsic viscosity of product were investigated and when the initial concentration of simulated water was 0.5 mg/L, pH value of 10, dosage of PDA was 8 mg/L, the removal efficiency of DBP reached a maximum value 92.4 %.