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生态学文献翻译求助，悬赏50金币，截止至9月22日 已有1人参与
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A sandy loam soil in the Azandarian area, Hamedan, western Iran, was sampled from the 0- to 30-cm layer. Soil was air-dried and passed through a 2-mm sieve. Soil properties were determined according to methods given in Rowell (1994). Soil pH and electrical conduc- tivity (EC) were measured in a 1:5 (w/v) ratio of soil to water by a glass electrode. Particle size analysis was madeusing the hydro meter method. Organic matter was measured using dichromate oxidation, and cation ex- change capacity (CEC) was determined as described by Rowell (1994). Olsen’s bicarbonate extractable P (Olsen-P) was determined using a soil to solution ratio 1:20 and 30-min shaking. Total P was after digestion of soil samples in a nitric acid–perchloric acid mixture (Olsenand Sommers 1982). A UV–Vis spectrophotom- eter (Varian model) was used to determine P concentra- tion in the extractant following the ammonium molyb- date method (Murphy and Riley 1962). Some of the properties of the Azandarian soil are shown in Table 1. The tested adsorbents were unmodified clay minerals (i.e., bentonite, calcite, kaolinite, and zeolite) and NPs (TiO2, Al 2O3, and Fe 3O4), also modified clay minerals with Fe3+ ions (adsorbent-Fe) and modified NPs with chitosan(adsorbent-chitosan)appliedatrate10and3% for soil amendment, respectively (except bentonite). To prepare modified adsorbent-Fe and adsorbent-chitosan, we used the method that is described by Li et al. (2011) |
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小眼睛看世界: 金币+50, ★★★很有帮助, 谢谢 2014-09-19 07:23:01
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从伊朗西部哈马丹省Azandarian区的沙质壤土0〜30厘米层采样。土壤风干并通过一个2毫米筛。用罗威尔（1994）方法测定土壤性质。玻璃电极测定土壤pH值和电电导率（EC），测定时土壤与水的的比例为1:5（重量/体积）。用水力计法分析颗粒大小。用重铬酸盐氧化测定有机物质，并根据 Rowell (1994)方法确定阳离子交换容量（CEC）。使用土液比1:20的样品震荡30分钟以测定奥尔森的碳酸氢盐提取磷（Olsen-P）。用硝酸 - 高氯酸混合液（Olsenand Sommers 1982）消化土样后获得总磷。用紫外可见分光光度计（Varian型号）确定萃取物中磷的浓度，萃取方法为钼酸铵法(Murphy and Riley 1962)。Azandarian土壤的某些特性见表1。 所测试的吸附剂是未改性的粘土矿物（即，膨润土，方解石，高岭土，沸石等）和纳米颗粒（TiO2，Al2O3和Fe3O4），以及含Fe3+离子的改性粘土矿物（吸附剂-Fe）和含有几丁聚糖的改性纳米粒子（吸附剂-几丁聚糖），这些吸附剂的使用率分别为土壤改良剂10％和3％（膨润土除外）。我们用Li等人（2011）所描述的方法制备改性吸附剂-Fe和吸附剂-几丁聚糖。 |
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