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Recently, the world has directed to find environmentally friendly and clean materials to be used to treat wastes difficult to treat in the traditional way such as dyes. The object of this study was to synthesize iron nanoparticles using black tea extracts in an environmentally sustainable method. Also, it was developed by supporting with bentonite, used to remove Eriochrome blue-black B dyes from synthesis wastewater of textile factory. From the results, it was noted that black tea leaf extract has reduced iron ions to iron nanoparticles at room temperature. Composite iron nanoparticles were characterized using Scanning Electron Microscope (SEM), and Atomic force microscopy (AFM) studies where the diameter of iron nanoparticles was less than 70 nm. This research shows that ferrous nanoparticles can be manufactured using black tea leaf extract as a reducing agent. It also shows better-supported nanoparticles than unsupported. The decolorization efficiency catalyzed BT-NZVI, B-BT-NZVI increased from (14%, 42%) to (48%, 68%) at 180 min of batch processes when the NZVI concentration was increased from 0.5 g/L to 2 g/L respectively.

In this study, the ability of the electrochemical process to remove aqueous high concentration phenol using an electrochemical cell with aluminum anode and cathode was examined. The removal rate of phenol was monitored using different parameters phenol concentration, pH, electrolysis time, current density, and electrode distance. Obtained results indicated that the low removal rates of phenol were observed at both low and high pH. However, the removal rate of phenol increased with an increase in the current density, each electrochemical process conditions need a certain electrodes distance. removal rate of phenol decreased with the increase in the initial phenol concentration. The maximum removal rate of phenol obtained from this study was 82%.

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The paint covering the toy contains a high percentage of heavy metal, which is a cumulatively toxic source despite the limitations set by organizations such as WHO standard. This study is concerned about measuring the amount of Lead, Cadmium, and Nickel in the children’s toys. Thirty-two samples of plastic toys were collected, in different colors i.e. black, red, and yellow that are used for all age groups 3-12 months, 1-3 years and finally 3-6 years. The samples were analyzed using SPSS program. From the results it was found that the concentration of Lead between (8.0625-12.1875 mg / kg), Nickel (7.125-12.8125 mg / kg), and Cadmium, (2.96875-4.0625 mg / kg), provided that all results were lower from that recommended by the standard of (ISO-8124-3) and US EPA. The black color toys have high concentration of heavy metal, from the SPSS program analysis show high correlation between concentration of heavy metal with different parameter, except the correlation between lead with prices and Nickel with color.