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Phosphorus Adsorption and Desorption Properties of Minnesota Basalt Lunar Simulant and Lunar Glass Simulant

机译：明尼苏达州玄武岩月球模拟物和月球玻璃模拟物对磷的吸附和解吸特性

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摘要

Phosphorus (P) adsorption and desorption characteristics of Minnesota Basalt Lunar Simulant (MBLS) and Lunar Glass Simulant (LGS) were evaluated. Results of P interactions with lunar simulants indicated that mineral and glass components adsorbed between 50 and 70% of the applied P and that between 85 and 100% of the applied P was desorbed. The Extended Freundlich equation best described the adsorption data (r(sup 2) = 0.92), whereas the Raven/Hossner equation best described the desorption data ((r(sup 2) = 0.97). Kinetic desorption results indicated that MBLS and LGS released most of their P within 15 h. The expanded Elovich equation fit the data best at shorter times while t/Q(sub DT) equation had a better fit at longer times. These results indicate that P does not strongly adsorb to the two simulants and that any P that was adsorbed was readily desorbed in the presence of anion exchange resin. This work suggests that multiple small applications of P (10-20 mg P/kg) should be added to the simulants to ensure adequate solution P for plant uptake and efficient use of P fertilizer.
机译：评估了明尼苏达州玄武岩月球模拟物（MBLS）和月球玻璃模拟物（LGS）对磷（P）的吸附和解吸特性。 P与月球模拟物相互作用的结果表明，吸附的50％至70％的施用的P中的矿物质和玻璃成分被解吸，而85％至100％的施用的P中的矿物和玻璃组分被解吸。扩展的Freundlich方程最能描述吸附数据（r（sup 2）= 0.92），而Raven / Hossner方程最能描述吸附数据（（r（sup 2）= 0.97）。动力学解吸结果表明MBLS和LGS释放他们的大多数P在15 h内。扩展的Elovich方程在较短的时间最适合数据，而t / Q（sub DT）方程在较长的时间更适合数据。这些结果表明P没有强烈吸附到两个模拟物上任何吸附的磷在阴离子交换树脂的存在下都易于解吸，这项工作表明应向模拟物中添加多次小剂量的磷（10-20 mg P / kg），以确保有足够的溶液P用于植物吸收和吸收。有效利用磷肥。

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