Effect of salinity on Cr bioaccumulation in juvenile coral trout under acute aqueous phase Cr(Ⅵ)exposure
LI Yu
YE Hengzhen
LIU Mengyuan
YU Weijie
LIU Fei
GUO Zhiqiang
Abstract：Salinity is an important water environmental factor,which has influence on heavy metals ac-cumulation.However,there is few study on how the effect of salinity on the bioaccumulation of hexa-valent chromium(Cr(Ⅵ)).In this study,the semi-static method was used to exposure juvenile coral trout(Plectropomus leopardus)with acute aqueous phase Cr(Ⅵ)concentration(5,20,50 mg/L;4,8,12,24 h)experiments for different salinity(16;32).Cr content was calculated with atomic absorp-tion spectrophotometry(AAS-Y193S)method,and the bioaccumulation factors and carcinogenic risks were assessed.The results showed that Cr content at 16 salinity was high than that at 32 salinity within 24 h in each tissues significantly(P＜0.05).The highest value was 82.15 mg/kg which appeared in liver.Tissues can be ordering as liver＞intestine＞heart＞muscle in the content.The BAF value at 16 salinity was mostly higher than that at 32 salinity,and the highest value was 3.62 which appeared in intestine,5 mg/L at 24 h.Carcinogenic risk exceeded the acceptable range under 12 and 24 h treat-ment.The highest value of CR was 1.189 X10-3 at 16 salinity,50 mg/L at 24 h.In this study,we found that 16 salinity not only effectively increased the Cr accumulation in juvenile coral trout but also increased the BAF and CR.Our findings improved our understanding of the relationship between the Cr bioaccumulation and salinity,and provided the basic data for studying the relationship between Cr bio-accumulation and salinity in marine fish.
Keywords：salinityCr(Ⅵ)bioconcentration factorhuman health risk assessment
Publication Date：2025-02-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 70-77 )