Anionic metal complexes, are very effectively bound by biomass types containing an abundance of amide groups. Readily available chitinous materials such as crab shells sorbed well anionic gold cyanide (AuCN_2~-), selenate (SeO_4~(2-)), chromate (CrO_4~2), and vanadate (VO_4~(3-)) at low pH. Equilibrium biosorption uptakes by acid-washed crab shells were up to 0.17 mmol Au/g (pH 3.5), 0.15 mmol Se/g (pH 3.0), 0.56 mmol Cr/g biomass (pH 2.0), 0.79 mmol V/g (pH 2.5). An increased ionic strength (IS as NaCl) suppressed the primary anion uptake as chloride ions competed for biosorbent protonated sites and higher IS reduced the activity of ions in solution.
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机译：阴离子金属配合物，通过含有丰富的酰胺基团的生物质类型非常有效地结合。易于使用的毛细管，如蟹壳吸附井阴离子金氰化物（Aucn_2〜 - ），硒酸盐（SeO_4〜（2-）），铬酸盐（CRO_4〜2），含钒酸盐（VO_4〜（3-））。酸洗蟹壳的平衡生物吸收高达0.17mmol Au / g（pH 3.5），0.15mmol SE / g（pH 3.0），0.56mmol Cr / g生物量（pH 2.0），0.79mmol v / g（pH值2.5）。增加的离子强度（如NaCl）抑制了作为生物吸附性位点竞争和更高的氯离子的主要阴离子摄取，从而降低了溶液中离子的活性。
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