Distribution and contamination assessment of arsenic and mercury in surface sediments from the intertidal zone of Yantai Sishili Bay, China

Abstract

Sixty surface sediment samples from the intertidal zone of Yantai Sishili Bay (YSB) have been analyzed for arsenic (As) and mercury (Hg) to evaluate their contamination levels and potential ecological risks. Concentrations of As and Hg ranged from 7.01-23.56 and 0.00-0.01 mg g ¡1 in the dry season; during the wet season, the corresponding data were 1.44-6.17 and 0.00-0.02 mg g ¡1. The geoaccumulation index (I geo) and potential ecological risk index (E r i) were used to conduct a pollution assessment. The results demonstrated that the intertidal zone of YSB has good sediment quality and that As and Hg are not likely to cause negative environmental impacts in the region.

Dissimilatory iron reduction contributes to anaerobic mineralization of sediment in a shallow transboundary lake

“…Compared with previous studies, the observed concentrations of Fe carb (0.129–0.973 g kg −1 ) in sediments in Lake Xiaoxingkai and Lake Xingkai were much higher than those in the Yellow River (0.01–0.07 g kg −1 ) [45] , Swan Lagoon (∼0.1 g kg −1 ) [46] , and Yantai Sishili Bay (0–0.0044 g kg −1 ) [47] , perhaps due to their different inner biogeochemical conditions and geographic positions. Fe carb is mainly adsorbed on the surface of fine CaCO 3 in sediments [48] , and thus Fe carb concentrations are possibly related to CaCO 3 deposition.…”

Distribution and ecological health risk assessment of dissolved trace metals in surface and bottom seawater of Yantai offshore, China

“…DO, Chl a, and S distribution were shown in Figure S2. The water temperature was high (T = 25.27 ± 0.81°C) (Table S2) and reached the optimum temperature for the growth of most phytoplankton (Wang et al, 2018a). The salinity (S = 31.05 ± 0.20 ‰) and pH value (7.93 ± 0.15) only varied to a limited extent (Table S2 and Figure S2).…”