Biosorption of toxic heavy metals Pb(II), Zn(II), Cd (II), Cu(II), Ni(II), Co(II), Hg(II), and Cr(VI) ions from aqueous solutions by loquat bark and leaves was investigated. The effects of pH, contact time, metal ncentration, biosorbent dosage, and temperature on the biosorption process were monitored . The experimental equilibrium biosorption data were analyzed by Langmuir and Freundlich adsorption isotherms. Fourier transform infrared spectrometer (FTIR) analysis confirms that - OH, - NH2, -C-O and -COO groups on loquat bark and leaves are one of the main active groups in metal biosorption...

Pollution in our planet by heavy metals is an important environmental problem threatening the health of human populations and natural ecosystems. Agricultural and industrial pollution release large amounts of heavy metals into the atmosphere, surface water, soil, and plants. The aim of this research work is to determine the potential of application of sodium polyphosphate modified kaolinite clay as an adsorbent for the removal of lead (II), zinc (II) and cadmium (II) ions from aqueous solutions. The adsorbent dosage, pH, temperature and contact time were investigated. The adsorption isotherms...

Zinc oxide nanoparticles have potential applications in various areas including optical piezoelectric, semiconductors, magnetic and gas sensing. Most of the approaches for synthesis zinc oxide (ZnO) nanopartcles use hazardous chemicals, high energy requirements and wasteful purification. Therefore, there is a growing need to develop environmentally friendly methods for synthesis of nanoparticles without using hazardous chemicals. Plant leaves provide a better platform for nanoparticles synthesis and have many advantages free from toxic materials, cost-effective and natural capping and...