Abstract
Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by incorporating CuONPs onto the surface of MMT K10 by reducing the metal precursor with the help of hydrazine hydrate. Effects of various factors on the efficiency of composite to remove hexavalent chromium were studied to find out the optimum conditions for maximum removal. Under optimum conditions 15 mg of the synthesized nanocomposite was found capable to almost completely remove (99.9 %) hexavalent chromium in 30 min from a 10 ppm aqueous chromium solution and that too in a wide range of pH from 2.88 to 5.56. The synthesized MMT K10 supported CuONPs were characterized by UV, SEM-EDX, FTIR and XRD studies. The average particle size of supported CuONPs was found to be 22.9 nm. Antibacterial potential of the prepared composite was also studied for one Gram-positive bacterium Staphylococcus aureus (ATCC 25323) and one Gram-negative bacterium Pseudomonas aeruginosa (ATCC 27853). The prepared nanocomposite was found to have excellent bactericidal potential and its statistical analysis was performed using t-test which indicates both bacterial strains of Pseudomonas aeruginosa and Staphylococcus aureus show different zone of inhibition for different concentrations.
Highlights
Water pollution due to heavy metals ions has become a serious concern because metal ions are non-biodegradable, accumulate in the environment and even in a low concentration cause adverse health hazards.[1]
To find out the optimum conditions effects of duration of treatment, amount of Clay-Supported Copper Oxide Nanocomposites (CuONC), pH, and initial Cr(VI) concentration were studied by changing the variables one by one keeping other factors constant
Antibacterial efficiency of the prepared nanocomposite was studied against two bacterial strains
Summary
Water pollution due to heavy metals ions has become a serious concern because metal ions are non-biodegradable, accumulate in the environment and even in a low concentration cause adverse health hazards.[1] Presence of chromium in the effluents coming from paint, metal finishing, textile and dyeing, electroplating, and leather tanning industries[2] is of considerable concern due to its highly toxic, carcinogenic and mutagenic nature It has adverse effect on plant and animal tissues even at low concentrations.[3,4,5] Out of many, Cr(III) and Cr(VI) are the most stable oxidation states which are much different in their chemical and toxicological properties. Exposure to chromium(VI) causes liver damage, pulmonary congestion, oedema, skin irritation and ulcer.[9]
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