模拟酸雨对土壤释放铝离子的影响

该研究用不同p H的溶液模拟酸雨淋洗土壤,不同时间同一p H的溶液模拟酸雨交换出铝离子,再用铝离子在醋酸-醋酸钠缓冲介质中与铬天青-S(CAS)及溴化十六烷基三甲基铵(CTMAB)反应生成蓝色三元铬合物在610nm处测其吸光度。结果表明:溶液的p H影响土壤淋洗液中的铝含量,随着酸雨p H的降低,淋出液中铝含量增加;同一p H溶液的淋浴时间越长,淋出液中铝离子浓度增大。酸雨使土壤的溶出铝量增加,从而危害植物的生长。

Effects of Simulated Acid Rain on the Release of Aluminum Ion in the Soil

In solution of different pH of simulated acid rain solution leaching of soil, unequal time in the same pH of simulated acid rain solution aluminum ion was exchanged , aluminum ion in acetic acid sodium acetate buffer medi?um and chromium Azure-S(CAS)and cetyl trimethyl ammonium bromide(CTMAB)reaction to generate blue ternary chromium complexes and measuring the absorbance at 610 nm. The pH of the solution affected the aluminum con?tent in the soil leaching solution. With the decrease of the acid rain pH, the aluminum content in the leaching solu?tion was increased;the longer the bath time of the same pH solution , the greater the concentration of aluminum ion in the leaching solution. Acid rain increases the amount of dissolved aluminum in the soil, which is harmful to the growth of plants.