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生態(tài)學(xué)文獻(xiàn)翻譯求助，懸賞50金幣，截止至9月22日 已有1人參與
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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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從伊朗西部哈馬丹省Azandarian區(qū)的沙質(zhì)壤土0〜30厘米層采樣。土壤風(fēng)干并通過(guò)一個(gè)2毫米篩。用羅威爾（1994）方法測(cè)定土壤性質(zhì)。玻璃電極測(cè)定土壤pH值和電電導(dǎo)率（EC），測(cè)定時(shí)土壤與水的的比例為1:5（重量/體積）。用水力計(jì)法分析顆粒大小。用重鉻酸鹽氧化測(cè)定有機(jī)物質(zhì)，并根據(jù) Rowell (1994)方法確定陽(yáng)離子交換容量（CEC）。使用土液比1:20的樣品震蕩30分鐘以測(cè)定奧爾森的碳酸氫鹽提取磷（Olsen-P）。用硝酸 - 高氯酸混合液（Olsenand Sommers 1982）消化土樣后獲得總磷。用紫外可見(jiàn)分光光度計(jì)（Varian型號(hào)）確定萃取物中磷的濃度，萃取方法為鉬酸銨法(Murphy and Riley 1962)。Azandarian土壤的某些特性見(jiàn)表1。 所測(cè)試的吸附劑是未改性的粘土礦物（即，膨潤(rùn)土，方解石，高嶺土，沸石等）和納米顆粒（TiO2，Al2O3和Fe3O4），以及含F(xiàn)e3+離子的改性粘土礦物（吸附劑-Fe）和含有幾丁聚糖的改性納米粒子（吸附劑-幾丁聚糖），這些吸附劑的使用率分別為土壤改良劑10％和3％（膨潤(rùn)土除外）。我們用Li等人（2011）所描述的方法制備改性吸附劑-Fe和吸附劑-幾丁聚糖。 |
小眼睛看世界2樓2014-09-19 01:17:37
3樓2014-09-19 07:21:50
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