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Effects of COVID-19 era on a subtropical river basin in Bangladesh: Heavy metal(loid)s distribution, sources and probable human health risks.
Siddique, Md Abu Bakar; Islam, Md Saiful; Ali, Mir Mohammad; Tokatli, Cem; Islam, Aznarul; Pal, Subodh Chandra; Idris, Abubakar M; Malafaia, Guilherme; Islam, Abu Reza Md Towfiqul.
Afiliación
  • Jawad-Ul-Haque; Department of Disaster Management, Begum Bekeya University, Rangpur 5400, Bangladesh.
  • Siddique MAB; Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh.
  • Islam MS; Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh.
  • Ali MM; Department of Aquaculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
  • Tokatli C; Trakya University, Laboratory Technology Department, Ipsala, Edirne,Turkey.
  • Islam A; Department of Geography, Aliah University, 17 Gorachand Road, Kolkata 700 014, West Bengal, India.
  • Pal SC; Department of Geography, The University of Burdwan, Bardhaman 713104, West Bengal, India.
  • Idris AM; Department of Chemistry, College of Science, King Khalid University, Abha 62529, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 62529, Saudi Arabia.
  • Malafaia G; Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí, GO, Brazil; Post-Graduation Program in Ecology, Conservation, and Biodiversity, Federal University of Uberlândia, Uberlândia, MG, Brazil; Post-Graduation Program in Biotechnology and Biodiversity,
  • Islam ARMT; Department of Disaster Management, Begum Bekeya University, Rangpur 5400, Bangladesh. Electronic address: towfiq_dm@brur.ac.bd.
Sci Total Environ ; 857(Pt 1): 159383, 2023 Jan 20.
Article en En | MEDLINE | ID: mdl-36240937
ABSTRACT
The COVID-19 era has profoundly affected everyday human life, the environment, and freshwater ecosystems worldwide. Despite the numerous influences, a strict COVID-19 lockdown might improve the surface water quality and thus provide an unprecedented opportunity to restore the degraded freshwater resource. Therefore, we intend to investigate the spatiotemporal water quality, sources, and preliminary health risks of heavy metal(loid)s in the Karatoya River basin (KRB), a tropical urban river in Bangladesh. Seventy water samples were collected from 35 stations in KRB in 2019 and 2022 during the dry season. The results showed that the concentrations of Ni, Cu, Zn, Pb, Cd, and Cr were significantly reduced by 89.3-99.7 % during the post-lockdown period (p < 0.05). However, pH, Fe, Mn, and As concentrations increased due to the rise of urban waste and the usage of disinfectants during the post-lockdown phase. In the post-lockdown phase, the heavy metal pollution index, heavy metal evaluation index, and Nemerow's pollution index values lessened by 8.58 %, 42.86 %, and 22.86 %, respectively. Besides, the irrigation water quality indices also improved by 59 %-62 %. The total hazard index values increased by 24 % (children) and 22 % (adults) due to the rise in Mn and As concentrations during the lockdown. In comparison, total carcinogenic risk values were reduced by 54 % (children) and 53 % (adults) in the post-lockdown. We found no significant changes in river flow, rainfall, or land cover near the river from the pre to post-lockdown phase. The results of semivariogram models have demonstrated that most attributes have weak spatial dependence, indicating restricted industrial and agricultural effluents during the lockdown, significantly improving river water quality. Our study confirms that the lockdown provides a unique opportunity for the remarkable improvement of degraded freshwater resources. Long-term management policies and regular monitoring should reduce river pollution and clean surface water.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / COVID-19 Tipo de estudio: Etiology_studies / Risk_factors_studies Límite: Adult / Child / Humans País/Región como asunto: Asia Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article País de afiliación: Bangladesh

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / COVID-19 Tipo de estudio: Etiology_studies / Risk_factors_studies Límite: Adult / Child / Humans País/Región como asunto: Asia Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article País de afiliación: Bangladesh