In this paper Cu3V2O8 nanoparicles were synthesized with a low‐cost and green method with using the extract of Moringa peregrine. This novel synthesized material was characterized by using X‐ray diffraction (XRD), Field emission scanning electron microscopy (FESEM) and Energy‐dispersive X‐ray spectroscopy (EDS) analysis. The analysis showed the produced nanoparticles have high purity and well crystalline structure. Moreover, the capability of the nanostructures for the removal of dye pollutants was evaluated. For this purpose, methylene blue was selected as a model of organic dye. The experiments showed Cu3V2O8 nanoparticles have high efficiency for removing of dye molecules. Photocatalytic decolorization of methyl blue was optimized with varying the experiment conditions. With 0.02 g of catalyst, pH 6 and concentration of dye 30 mg/l removal efficiency was obtained about 90% in a short time 20 min. Also a kinetic study showed this photodegradation process obeys a first‐order kinetic with rate constant about 0.07 min−1.

a b s t r a c tThe aim of this study was investigating the phosphate removal from aqueous environments by electrocoagulation (EC) in bipolar connection mode. In the study, iron plates were used as electrode with mucilage of Plantago ovata as a natural aid-coagulant and aid-flocculent. The several operational parameters such as the concentrations of phosphate, pH, operating time on the removal efficiency of phosphate were determined. The results showed that in the operating removal condition when mucilage was added as aid coagulant, the removal efficiency was improved. In this condition, the formed flocs in EC easily floated on surface of the solution. The process is completely effective in low concentration (100% removal in 5 mg/L phosphate). The sludge formed in EC with mucilage could be used to improve poor soils with low iron, phosphorus and organic matters.

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