Novel synthesized Chitosan–Copper oxide nanocomposite (Cs–CuO) was prepared using pomegranate peels extract as green precipitating agents to improve the biological activity of Cs-NP's, which was synthesized through the ionic gelation method. The characterization of biogenic nanoparticles Cs-NP's and Cs–CuO-NP's was investigated structurally, morphologically to determine all the significant characters of those nanoparticles. Antimicrobial activity was tested for both Cs-NP's and Cs–CuO-NP's via minimum inhibition concentration and zone analysis against fungus, gram-positive and gram-negative. The antimicrobial test results showed high sensitivity of Cs–CuO-NP's to all microorganisms tested in a concentration less than 20,000 mg/L, while the sensitivity of Cs-NP's against all microorganisms under the test started from a concentration of 20,000–40,000 mg/L except for the C. albicans species. The hematological activity was also tested via measuring the RBCs, platelet count, and clotting time against healthy, diabetic, and hypercholesteremia blood samples. The measurement showed a decrease in RBCs and platelet count by adding Cs-NP’s or Cs–CuO-NP's to the three blood samples. Cs-NP's success in decreasing the clotting time for healthy and diabetic blood acting as a procoagulant agent while adding biogenic CuO-NP’s to Cs-NP’s increased clotting time considering as an anti-coagulant agent for hypercholesteremia blood samples.

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a b s t r a c tThe modification of silica via incorporation of hydrated zinc oxide (HZnO) with different loadings was achieved using wet precipitation technique. After drying at room temperature, the obtained samples calcined at 105°C and characterized using X-ray powder diffractometer, scanning electron microscopy, electron diffraction X-ray, transmission electron microscopy, Fourier transform infrared spectroscopy and BET. The data of characterizations indicated the well-distributed HZnO particles inside the silicate matrix with average particle size were lower than the detection limit of some characterization instruments. Furthermore, the modification with HZnO led to a noticeable decrease in BET surface area and the energy band gap due to the occupation of ZnO for interstitial positions inside the silicate matrix. The modified samples were successfully utilized in the adsorption and photocatalytic degradation of Methyl green dye as one of the cationic hazardous organic pollutants. The adsorption capacity of the sorbent catalyst was found to be 24.91 mg g -1 , while complete degradation of the (2 × 10 -4 mol L -1 ) dye was fulfilled in no more than 16 min. The influence of different experimental parameters as pH, temperature, concentration of the dye and dose of the catalyst was examined. The results obtained indicate that both adsorption and degradation of MG were a pH, dose and temperature dependent. The easiness of regeneration of the exhausted catalyst and its successive reuse confirmed remarkable economic efficiency.