EFFECT OF DEICING SALTS ON METAL AND ORGANIC-MATTER MOBILIZATION IN ROADSIDE SOILS
EFFECT OF DEICING SALTS ON METAL AND ORGANIC-MATTER MOBILIZATION IN ROADSIDE SOILS
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DOI：
10.1021/es00028a006
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发表时间：
1992-04-01
影响因子：
11.4
通讯作者：
MOSHER, PA
中科院分区：
文献类型：
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作者：
AMRHEIN, C;STRONG, JE;MOSHER, PA
路边土壤取样的地区，收到繁忙的交通和除冰盐。 这些土壤在6 ℃下用NaCl、醋酸钙镁（CMA）或去离子水溶液在柱中浸出，以模拟来自道路的盐水径流，然后是融雪或雨水。 在盐溶液渗滤液中，Cr，Pb，Ni，Fe，Cd和Cu的浓度随着盐浓度的增加而增加，这表明配体络合和竞争交换影响动员。 在最初用氯化钠，然后用去离子水，广泛的有机质和高浓度的铬，铅，镍，铁，铜的土壤浸出进行了观察。 在高交换性钠和低电解质浓度条件下，控制金属活化的主导机制是有机质的分散。
Roadside soils were sampled from areas that receive heavy traffic and deicing salts. These soils were leached in columns at 6-degrees-C with solutions of NaCl, calcium magnesium acetate (CMA), or deionized water to simulate the runoff of salty water from a roadway followed by snowmelt or rainwater. In the salt solution leachates, the concentrations of Cr, Pb, Ni, Fe, Cd, and Cu tended to increase with increasing salt concentration, suggesting that ligand complexation and competitive exchange affected mobilization. In the soils leached initially with NaCl, followed by deionized water, extensive mobilization of organic matter and elevated concentrations of Cr, Pb, Ni, Fe, and Cu were observed. The dominant mechanism controlling metal mobilization was dispersion of organic matter under conditions of high exchangeable Na and low electrolyte concentration.