Silver speciation in wastewater effluent, surface waters, and pore waters
Silver speciation in wastewater effluent, surface waters, and pore waters
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DOI：
10.1002/etc.5620181203
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发表时间：
1999-12-01
影响因子：
4.1
通讯作者：
Kramer, JR
中科院分区：
文献类型：
--
作者：
Adams, NWH;Kramer, JR
银，无机硫化物，硫醇化合物测定城市污水，接收沃茨，和孔隙沃茨从缺氧湖泊沉积物，以预测银形态在这些系统中。我们发现，即使在充分氧化的地表水中，无机硫化物的亚微摩尔浓度。这种无机硫化物很可能以胶体金属硫化物的形式存在，已证明其在氧化条件下稳定数小时。发现废水流出物和接收沃茨中的无机硫化物比银浓度高200至300倍，而孔隙沃茨中的无机硫化物比银浓度高1，000至15，000倍。硫化物超过银，我们预测银硫化物络合物占主导地位的银形态。硫醇以低纳摩尔水平存在于孔隙沃茨中，但未检测到（0.45 μ m）、胶体（10 kDa，0.45 μ m）和溶解（
Silver, inorganic sulfide, and thiol compounds were measured in municipal wastewater effluent, receiving waters, and pore waters from an anoxic lake sediment in order to predict silver speciation in these systems. We found submicromolar concentrations of inorganic sulfide even in fully oxic surface water. This inorganic sulfide is likely to exist in the form of colloidal metal sulfides, which have been shown to be stable under oxidizing conditions for periods of several hours. inorganic sulfide in both the wastewater effluent and receiving waters was found to be 200 to 300 times in excess of silver concentrations, whereas inorganic sulfide in the pore waters was 1,000 to 15,000 times in excess of silver concentrations. With sulfide in excess of silver, we predict silver sulfide complexes to dominate silver speciation. Thiols were present at low nanomolar levels in pore waters but were not detectable (0.45 mu m), colloidal (10 kDa, 0.45 mu m), and dissolved(