Scholarlink

<p>This study examines the seasonal variations of physicochemical characteristics, microbial load, and antibiotic residue in the Gomti River and associated Bharwara Sewage Treatment Plant (STP), India. Water sample were collected during pre-monsoon, monsoon, and post-monsoon seasons to assess spatial and temporal variations. Significant fluctuations were recorded in parameters such as pH, electrical conductivity (EC), salinity, total dissolved solids (TDS), chemical oxygen demand (COD), nutrients and heavy metals. Among these COD levels at both inlet (204.86 ± 49.34—210.77 ± 24.15&#xa0;mg/l) and outlet (45.92 ± 13.30—139.63 ± 16.46&#xa0;mg/l) exceeded the permissible limit prescribed by the Central Pollution Control Board (CPCB, 2021) across all seasons, indicating incomplete efficiency. Bacteriological analysis revealed high contamination with total coliforms, fecal coliforms, and thermos-tolerant <i>E. coli</i>, with total coliforms counts in the river ranging from 366 × 10<sup>1</sup> to 540 × 10<sup>1</sup>&#xa0;CFU/100/ml. The lowest bacterial counts during monsoon were attribute to rainfall-induced dilution. Heavy metals (Fe, Pb, Zn, and Cu) showed seasonal variations, with Fe exceeding Bureau of Indian Standards (Bureau of Indian Standards. (2012).&#xa0;IS 10500: Drinking Water Specification&#xa0;(2nd Revision)) standards in river water. Furthermore, ciprofloxacin residues (0.01–0.49&#xa0;µg/l) were detected in both STP and river samples, posing potential risks of antibiotic resistance proliferation. The finding highlights the critical influence of seasonal variation on water quality and underscores the urgent need for improved wastewater management, antibiotic monitoring, and sustainable river pollution mitigation strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seasonal Variation in Physicochemical Properties, Microbial Load and Occurrence of Antibiotics Residues in Gomti River and Sewage Treatment Plant, India

  • 期刊论文

  • 发表日期：

    2026年3月5日

查看全文
  • Anjali Singh,
  • Shalini G. Pratap,
  • Abhay Raj

摘要

This study examines the seasonal variations of physicochemical characteristics, microbial load, and antibiotic residue in the Gomti River and associated Bharwara Sewage Treatment Plant (STP), India. Water sample were collected during pre-monsoon, monsoon, and post-monsoon seasons to assess spatial and temporal variations. Significant fluctuations were recorded in parameters such as pH, electrical conductivity (EC), salinity, total dissolved solids (TDS), chemical oxygen demand (COD), nutrients and heavy metals. Among these COD levels at both inlet (204.86 ± 49.34—210.77 ± 24.15 mg/l) and outlet (45.92 ± 13.30—139.63 ± 16.46 mg/l) exceeded the permissible limit prescribed by the Central Pollution Control Board (CPCB, 2021) across all seasons, indicating incomplete efficiency. Bacteriological analysis revealed high contamination with total coliforms, fecal coliforms, and thermos-tolerant E. coli, with total coliforms counts in the river ranging from 366 × 101 to 540 × 101 CFU/100/ml. The lowest bacterial counts during monsoon were attribute to rainfall-induced dilution. Heavy metals (Fe, Pb, Zn, and Cu) showed seasonal variations, with Fe exceeding Bureau of Indian Standards (Bureau of Indian Standards. (2012). IS 10500: Drinking Water Specification (2nd Revision)) standards in river water. Furthermore, ciprofloxacin residues (0.01–0.49 µg/l) were detected in both STP and river samples, posing potential risks of antibiotic resistance proliferation. The finding highlights the critical influence of seasonal variation on water quality and underscores the urgent need for improved wastewater management, antibiotic monitoring, and sustainable river pollution mitigation strategies.