Accumulation and contamination assessment of heavy metals in sediments of commercial aquaculture farms from a coastal area along the northern Bay of Bengal

Heavy metal contamination in aquaculture farm sediment may create a major risk to ecosystem and human health via the food web as result of poor handling, incorrect waste management, extensive use artificial feed increase yield make profit. In this study, heavy metals (e.g., Cd, Cr, Pb, Cu, Zn, Mn, Ni) were analyzed examine accumulation, sources, levels from bottom samples 12 different commercial farms South Asian coastal area using atomic absorption spectrometer (AAS). The findings revealed that mean concentrations (µg/g) followed decreasing order Mn (48.75 ± 6.75) > Zn (7.09 2.61) Ni (6.85 2.08) Cr (5.01 1.04) Cu (3.00 0.54) Pb (2.77 0.80) Cd (0.22 0.07). Contamination factor (CF < 1) geo-accumulation index (I geo 0) for all implying unpolluted status fish by metals. pollution load (PLI) was found 0.11 refereeing very low level contamination. Positive significant correlations ( p 0.05) between Cu-Cr (r = 0.65), Mn-Cd 0.594), Zn-Pb 0.591), Zn-Cu 0.586) Zn-Cr 0.757) indicated their similar sources origin. Multivariate analysis like cluster analyses (CA) principal component (PCA) specified might have anthropogenic sources. Therefore, future research is recommended determine element mobility pond fish, thereby reduce environmental health.