Year:2022   Volume: 4   Issue: 3   Area:

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  3. ID: 207

Nuralhuda Aladdin JASIM


Surfactants increased the steric hindrance as well as the charge repulsion between nearby CNT particles, which ‎improved their suspension, according to dynamic light scattering (DLS) investigations. In addition, hydroxyl alteration ‎of MWCNTs resulted in stable dispersions in water containing HA at 10 and 1000 mg/L, but COOH-MWCNT ‎suspensions only showed stable dispersion with decreased negative surface charges at 100 mg/L. Agglomerates were ‎significantly reduced in the f-MWCNT kinds. The surface characteristics of f-MWCNTs were found to have an ‎important role in the possible hazardous consequences of CNTs. Due to their well-distributed stability in water, the ‎interaction between the HA-CNTs and the plants increased development in terms of water intake, growth rate, ‎chlorophyll index, dry weight, and root elongation rate. Furthermore, there were no variations in chlorophyll ‎concentration between the f-MWCNT and HA plant groups. The f-MWCNTs dramatically improved the plants' growth, ‎water transpiration, and dry shoot and root weight. Exposure to OH-MWCNTs appeared to benefit tomato ‎development in terms of water uptake, root elongation rate, and growth rate, but exposure to COOH-MWCNTs ‎appeared to be hazardous in terms of root leakage and growth rate. Overall, our findings imply that the surface features ‎of CNTs, as well as their dispersion stability, determine their impact on tomato plant growth. According to our findings, ‎there is a strong link between the toxicity of f-MWCNTs and the toxicity of the dispersing agent. Thus, MWCNTs with ‎hydroxyl modifications were found to be stable.‎

Keywords: Functionalized Multi-Walled Carbon Nanotubes, Phytotoxicity, Humic Acid, OH-Mwcnts And COOH-Mwcnts.‎