Browsing by Author "Naveen Kumar Singh"

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Evaluation of Wastewater Quality Using Multivariate Analysis and Water Quality Index for its Sustainable Management in Urban Area
(University of Tehran, 2024) Govind Gupta; Jabbar Khan; Naveen Kumar Singh; Vivek Narayan Bhave; Vinay Bharadwaj; Rajeev Pratap Singh
In present study, wastewater quality was evaluated applying multivariate analysis (PCA) and water quality index with respect to the Indian standards in the selected urban areas of Jaipur region, Rajasthan, India. Maximum average values of BOD5, TDS, chloride and fluoride were recorded as 21 mg/L, 1501 mg/L, 285.0 mg/L and 1.8 mg/L, respectively, along with metal concentration in order of Zn (6.31 mg/L )> Fe (0.52 mg/L )> Mn (0.25 mg/L), Cu (0.16 mg/L)> Pb (0.11 mg/L)> Ni (0.02 mg/L). PCA indicates four components extracted with a total variance of 78.48% from the water quality parameters. Wastewater Quality Index (WWQI) analysis emphasis level of pollution load at different sites which revealed 40% of the selected sites were inappropriate for reuse without treatment, however, 60% of the sites with moderate pollution load could be suitably reuse in agricultural and aquaculture. Findings of the present study conclude that multivariate analysis and wastewater quality index could be used as an effective tool for environmental monitoring, assessing, and categorizing wastewater to opt appropriate treatment, reuse and recycling options for sustainable wastewater management. © 2024 University of Tehran. All rights reserved.
Mechanistic action of pesticides on pests and their consequent effect on fishes and human health with remediation strategies
(IWA Publishing, 2023) Anita Singh; Monika Mahajan; Richa Kothari; Naveen Kumar Singh; Rajeev Pratap Singh
Population detonation and inflated demand for agricultural products have resulted in the rampant use of pesticides in recent years. These pesticides are used to reduce the number of pesticides by different mechanisms. They have been utilized in agriculture to expand agrarian profit, crop yield, quality, and storage life. The incessant and extensive use of resistant pesticides has contaminated the water bodies, fields, crops, and aquatic biota as well as posing a threat to human health. As a result, stringent regulations and limits are established to monitor the pesticide matrix. The current review focuses on pesticide contamination in the food chain, particularly from the aquatic bodies to fishes and humans. It also discusses strict regulations and limits including maximum residual limits for food items, acceptable daily intake, theoretical maximum daily intake, and estimated carcinogenicity/non-carcinogenicity for fishes and human health risks. In addition to conferring the negative effects of pesticides, this article discusses cost-effective remediation techniques such as phytoremediation, adsorption, the Fenton oxidation method, microalgal/high-rate algal ponds, and nanotechnology with the comparison of their remediation cost. © 2023 The Authors.