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Md. Arif Hossen
Chittagong University of Engineering and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0003-3635-3011
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The present study portrayed a better understanding of the chemical characteristics of rainwater in South-Eastern region of Bangladesh (e.g. Chattogram) as well as to identify the potential sources of different precipitation constituents in the study region that were often unexplored and not well understood. Rainwater pH, major ions, and trace metals were measured in samples collected from five different locations with different land use patterns of Chattogram Metropolitan area (CMA) during the two rainy seasons. The samples were tested following standard protocols. The results of this study exhibit variability in rainwater quality across the sites signifying site-specific influences. The mean concentration of all measured physicochemical parameters, ions and trace metals in rainwater samples were found significantly lower compared to the drinking water quality standard of Bangladesh. In context of ionic constituents, the higher concentrations of nitrate (NO3-) and sulphate (SO42-) were generally in commercial area. The correlation matrix and principal component analysis (PCA) indicated that NO3- and SO42- were from anthropogenic sources, e.g. automobile exhaust, incomplete fuel combustions, and industrial emissions. The average concentration of trace metals in rainwater was followed a decreasing order: Zn ˃ Cu ˃ Fe ˃ Cr ˃ Mn ˃ Pb ˃ Cd. Trace metals concentration, especially copper (Cu) and zinc (Zn) were found maximum in the industrial catchment area. The resulting outcomes of this study could be useful to investigate the influences of industrial, urban, and agricultural emissions that elaborate the physical processes regulating the chemical characteristic of the atmosphere in the investigated area.
Keywords
Chemical composition, Industrial area, Commercial area, Rainwater, Southern-eastern Bangladesh
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research
Md. Arif Hossen
Chittagong University of Engineering and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0003-3635-3011
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
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History
CURRENT STATUS: Posted
Version 1
Posted 22 Oct, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Environmental Policy
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The present study portrayed a better understanding of the chemical characteristics of rainwater in South-Eastern region of Bangladesh (e.g. Chattogram) as well as to identify the potential sources of different precipitation constituents in the study region that were often unexplored and not well understood. Rainwater pH, major ions, and trace metals were measured in samples collected from five different locations with different land use patterns of Chattogram Metropolitan area (CMA) during the two rainy seasons. The samples were tested following standard protocols. The results of this study exhibit variability in rainwater quality across the sites signifying site-specific influences. The mean concentration of all measured physicochemical parameters, ions and trace metals in rainwater samples were found significantly lower compared to the drinking water quality standard of Bangladesh. In context of ionic constituents, the higher concentrations of nitrate (NO3-) and sulphate (SO42-) were generally in commercial area. The correlation matrix and principal component analysis (PCA) indicated that NO3- and SO42- were from anthropogenic sources, e.g. automobile exhaust, incomplete fuel combustions, and industrial emissions. The average concentration of trace metals in rainwater was followed a decreasing order: Zn ˃ Cu ˃ Fe ˃ Cr ˃ Mn ˃ Pb ˃ Cd. Trace metals concentration, especially copper (Cu) and zinc (Zn) were found maximum in the industrial catchment area. The resulting outcomes of this study could be useful to investigate the influences of industrial, urban, and agricultural emissions that elaborate the physical processes regulating the chemical characteristic of the atmosphere in the investigated area.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
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