首页|Sunlight mediated removal of toxic pollutants from Yamuna wastewater using efficient nano TeO_2–ZnO nanocomposites

Sunlight mediated removal of toxic pollutants from Yamuna wastewater using efficient nano TeO_2–ZnO nanocomposites

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We have utilised our TeO_2–ZnO nanocomposites for Yamuna wastewater treatment in natural sunlight whereinthe sampling site was Nigam Bodh Ghat, Kashmere Gate, Delhi. In BET isotherm, TZ NCs exhibited type IVisotherm forming a H3 like hysteric loop sustaining mesoporous characteristic with an increase in surface area,pore volume and pore diameter of 56.76 m~2/g, 0.257 cc/g and 17.18 nm respectively, when compared to pristineZnO NPs. Yamuna wastewater treatment was carried out using various concentrations of TZ NCs (range 0.1–0.3g/500 mL) under natural sunlight. Post-treatment, all the physicochemical parameters such as DO, BOD, COD,Nitrates, Ammonia and Phenolic contents were found to be reduced to 10 times bringing Yamuna waterparameters within safe limits. Our TZ NCs have shown to have high selectivity for the removal of Chromium fromwater. Out of all the three concentrations 0.2 g/500 mL or 0.4 mg/mL is the most optimum concentration of TZNCs for complete Yamuna wastewater treatment. Also, the bacterial culture present in Yamuna water was killedby 90% using TZ having MIC of 0.1 mg/mL. The antibiofilm activity of TZ against K.pneumoniae MTCC 109 wasalso checked using Congo Red Agar Assay. The presence of heavy metals, their corresponding degradation andleaching studies were analysed using ICP-OES. TZ NCs showed a very minimal leaching rate of Zinc into thewater, proving no toxicity associated with these nanocomposites. Further, to observe the safe disposal of TZ NCsinto the soil, TZ NCs were utilised for ecotoxicity studies.

TeO_2-ZnOPhysiochemical parametersPhenolic pollutantsAntibacterialHeavy metal degradationEcotoxicity

Aishwarya Singh、Suraj Kumar Modi、Preeti Joshi、Bhavani Prasad Nenavathu、Manu Smriti Singh、Swati Verma、Mohammad Rafe Hatshan

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Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical University for Women, Delhi, 110006, India

Department of Biotechnology, Bennett University, Greater Noida, Uttar Pradesh, 201310, India,Centre of Excellence for Nanosensors and Nanomedicine, Bennett University, Greater Noida, Uttar Pradesh, India

Department of Biotechnology, Bennett University, Greater Noida, Uttar Pradesh, 201310, India,Centre of Excellence for Nanosensors and Nanomedicine, Bennett University, Greater Noida, Uttar Pradesh, India,Centre for Life Sciences, Mahindra University Survey, No: 62/1A, Bahadurpally Jeedimetla, Hyderabad, Telangana, 500043, India

Department of Civil and Environmental Engineering, Hanyang University, Seoul, 04763, Republic of Korea

Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia

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2024

10.1016/j.chemosphere.2023.140658

Chemosphere

Chemosphere

ISSN：0045-6535
年,卷(期)：2024.348(Jan.)
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