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This study evaluated the chronic toxicity of Ni‐spiked freshwater sediments to benthic invertebrates. A 2‐step spiking procedure (spiking and sediment dilution) and a 2‐stage equilibration period (10 wk anaerobic and 1 wk aerobic) were used to spike 8 freshwater sediments with wide ranges of acid‐volatile sulfide (AVS; 0.94–38 µmol/g) and total organic carbon (TOC; 0.42–10%). Chronic sediment toxicity...
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