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Dissolved trace elements in Hooghly (Ganges) River Estuary, India: Risk assessment and implications for management

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Title Dissolved trace elements in Hooghly (Ganges) River Estuary, India: Risk assessment and implications for management
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Creator Soumita Mitra,
Santosh Kumar Sarkar,
Pushpanathan Raja
Jayanta Kumar Biswas,
Kadarkarai Murugan
 
Subject Surface water Trace elements Environment monitoring Spatial and seasonal variation Human health risk assessment Hooghly estuary
 
Description Not Available
The study presents a spatio-seasonal distribution of 13 trace elements in the surface water (0–5 cm) along the
north–south gradient of Hooghly River Estuary, India, and subsequently evaluates the human health risk by
adopting USEPA standards. An overall homogeneous spatial distribution of elements was pronounced, whereas
an irregular and inconsistent seasonal pattern were recorded for the majority of the elements. The concentration
range (μg/l) of the elements and their relative variability were obtained as follows in the decreasing order: Al
(55,458–104,955) > Fe (35,676–78,427) > Mn (651.76–975.78) > V (85.15–147.70) > Si
(16.0–153.88) > Zn (26.94–105.32) > Cr (21.61–106.02) > Ni (19.64–66.72) > Cu (34.70–65.80) > Pb
(26.40–37.48) > Co (11.16–23.01) > As (0.10–8.20) > Cd (1.19–5.53). Although Pb, Ni, Cr, Al, Fe, and Mn
exceeded the WHO prescribed threshold limit for drinking water, Metal Pollution Index values (8.02–11.86)
superseded the upper threshold limit endorsing adverse impact on biota. The studied elements were justified to
have a non-carcinogenic risk as derived from hazard quotient and hazard index values. However, the trace
elements As, Cd, Pb, and Cr exceeded the upper limit of cancer risk (10−4), thereby leading to carcinogenic risk
concern for both children and adult population groups, where children are more susceptible than the adults.
Hence, evaluation of bioavailable fractions of the elements is required for proper management of this stressed
fluvial system.
Not Available
 
Date 2020-06-12T09:32:02Z
2020-06-12T09:32:02Z
2018-05-26
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/37113
 
Language English
 
Relation Not Available;
 
Publisher Not Available