Influence of Acid Volatile Sulfide and Metal Concentrations on Metal Bioavailability to Marine Invertebrates in Contaminated Sediments

Abstract

An 18-day microcosm study was conducted to evaluate the influence of acid volatile sulfides (AVS) and metal additions on bioaccumulation from sediments of Cd, Ni, and Zn in two clams (Macoma balthica and Potamocorbula amurensis) and three marine polychaetes (Neanthes arenaceodentata, Heteromastus filiformis, and Spiophanes missionensis). Manipulation of AVS by oxidation of naturally anoxic sediments allowed use of metal concentrations typical of nature and evaluation of processes important to chronic metal exposure. A vertical sediment column similar to that often found in nature was used to facilitate realistic biological behavior. Results showed that AVS or porewater (PW) metals controlled bioaccumulation in only 2 of 15 metal-animal combinations. Bioaccumulation of all three metals by the bivalves was related significantly to metal concentrations extracted from sediments (SEM) but not to [SEM -AVS] or PW metals. SEM predominantly influenced bioaccumulation of Ni and Zn in N. arenaceodentata, but Cd bioaccumulation followed PW Cd concentrations. SEM controlled tissue concentrations of all three metals in H. filiformis and S. missionensis, with minor influences from metal-sulfide chemistry. Significant bioaccumulation occurred when SEM was only a small fraction of AVS in several treatments. Three factors appeared to contribute to the differences between these bioaccumulation results and the results from toxicity tests reported previously: differences in experimental design, dietary uptake, and biological attributes of the species, including mode and depth of feeding.

Acid-volatile sulfide and simultaneously extracted metals in surface sediments of the southwestern coastal Laizhou Bay, Bohai Sea: Concentrations, spatial distributions and the indication of heavy metal pollution status

“…Therefore applying this theory to metal remobilization studies would be proper only in the case that sulfides are not oxidized during elutriation (Di Toro et al, 1990;Durán et al, 2012). During the past years, much evidence has shown that benthic invertebrates can accumulate metals, even when [SEM]-[AVS] < 0, since benthic invertebrates ingest sediment particles as their main food source disregarding AVS (Lee et al, 2000a;Lee et al, 2000b;De Jonge et al, 2009;De Jonge et al, 2010). YHH3 YHH2 YHH1 GLH3 GLH2 GLH1 YHH-GLH ZMH2 ZMH1 ZM-YHH L1 L2 L3 L4 L5 MH6 MH5 XQH4 XQH3 XQH2 XQH1 K1 K2 K3 MH4 MH3 MH2 MH1 J1 J2 J3 J4 BLH3 BLH2 BLH1 I1 I2 I3 DH2 DH1 YH5 YH4 YH3 YH2 YH1 H1 H2 H3 WH3 WH2 WH1 JLH2 SEMs can be combined with AVS to reduce their toxicity; however, AVS of excessively high content is also harmful to aquatic organism.…”

Ecological risk index for aquatic pollution control: a case study of coastal water bodies from the Rio de Janeiro State, southeastern Brazi

“…Isto porque a biodisponibilidade de metais não é necessariamente indicativa de toxicidade, pois condições ecológicas e fisiológicas podem modificar a extensão em que os organismos são expostos aos metais (Lee et al 2000).…”

Influence of reactive sulfide (AVS) and supplementary food on Ag, Cd and Zn bioaccumulation in the marine polychaete Neanthes arenaceodentata

“…The sediment samples were handled under a glove bag filled with N 2 gas. In the laboratory, a portion of the collected sediment was spiked with metals and manipulated for appropriate AVS levels following a protocol established by Lee et al (2000b). Briefly, the sediment was mixed with the equal volume of deoxygenated seawater (30 psu) that had been previously spiked with the metal stock solutions prepared with reagent grade AgNO 3 , CdCl 2 and ZnCl 2 .…”