Abstract
AbstractIn this study, we measured the distribution of heavy metals (Pb, Ni, Fe, Mn, Cd, Cu) in the surface water of Bengal Coast at the southern part of Bangladesh. We also examined the common water quality parameters to discuss the impacts of pollution. It was revealed that the majority of the heavy metals have been introduced into the Bengal marine from the riverine inflows that are also affected by the impact of industrial, ship breaking yard, gas production plant and urban wastes. The concentration of heavy metals was measured using atomic absorption spectroscopy (AAS) instrument. Heavy metals concentrations were found to decrease in sequence of Fe > Mn > Pb > Cu > Cd > Ni. Results showed that heavy metal concentrations in the marine surface water generally exceed the criteria of international marine water quality. Moreover, both the contamination factor (CF) and pollution load index (PLI) values suggested the elevation of heavy metals concentration in the region. Constant monitoring of the Bengal co...
Highlights
In recent years, the pollution of the aquatic environment with heavy metals has become a worldwide problem
Concentration of heavy metals in the water sample of Bay of Bengal is shown in Figure 2 which reflects the order of metal concentration of the present study as follows: Fe > Mn > Pb > Cu > Cd > Ni
The average concentration of Fe, Mn, Pb, Cu, Cd, and Ni in the water of near shore of Bay of Bengal is shown in Figure 2 which are 23.68 mg/L, 1.136 mg/L, 0.452 mg/L, 0.164 mg/L, 0.012 mg/L, and 0.0066 mg/L, respectively, and actual concentration ranged between 0.1561–60.454 mg/L, 0.52–1.80 mg/L, 0.0964–0.694 mg/L, 0.119–0.192 mg/L, 0.0017–0.098 mg/L and 0.0055–0.1091 mg/L, respectively
Summary
The pollution of the aquatic environment with heavy metals has become a worldwide problem Toxic pollutants, such as heavy metals originating from direct atmospheric deposition, geologic weathering, or through the discharge of industrial waste products deposited in marine sediments as a sink. Due to their potential toxic effect and ability to bioaccumulation in aquatic ecosystems (Rainbow, 2007; Wang & Rainbow, 2008), the investigation of distribution and pollution degree of heavy metals in coastal area has attracted more public concerns recently (Christophoridis, Dedepsidis, & Fytianos, 2009; Feng et al, 2011; Gao & Chen, 2012; Larrose et al, 2010; Liu et al, 2011; Sundaray, Nayak, Lin, & Bhatta, 2011; Varol, 2011; Yang et al, 2012). It is important to assess and track the abundance of these heavy metals in coastal ecosystem (Namminga & Wilhm, 1976)
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