کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8894054 | 1629394 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tailoring hydroxyapatite nanoparticles to increase their efficiency as phosphorus fertilisers in soils
ترجمه فارسی عنوان
استفاده از نانوذرات هیدروکسی آپاتیت برای افزایش کارایی آنها به عنوان کود کودهای فسفر در
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
Hydroxyapatite nanoparticles (HA-NPs) have been proposed as a novel phosphorus (P) fertiliser that could potentially provide increased efficiency through controlled release. In the present study, three types of HA-NPs were synthesised with differences in surface charge and hydrodynamic sizes before being incubated in two P-deficient soils (an Ultisol and a Vertisol) in the laboratory for up to 240â¯d. The three types of HA-NPs had surface charge values of +21 (±4.3), 0 (±3.5) and â12 (±2.7) mV in a neutral medium (pHâ¯7). In the Ultisol (pHâ¯4.7), the addition of HA-NPs resulted in a smaller initial increase in P availability than triple superphosphate (TSP) due to their lower solubility. However, P availability in the TSP treatment decreased over time due to adsorption of P to the soil constituents, with a concomitant increase in the NaOH-extractable P fraction. In contrast, the release of P from the HA-NPs remained relatively constant over the entire incubation period. After 45â¯d, the soils amended with negatively charged HA-NPs had higher levels of available P when estimated using diffusive gradients in thin films (DGT-P) compared to both the neutral and the positively charged HA-NPs. In the Vertisol (pHâ¯8.2), although the addition of TSP increased P availability markedly, amendment with the three HA-NPs did not increase P availability due to the low solubility of hydroxyapatite at this high pH. Indeed, for the Vertisol, most of the P added as HA-NPs remained in the Ca-P fraction. Our results show that for the acidic Ultisol, HA-NPs with altered surface charges are potentially a useful form of slow release P.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 323, 1 August 2018, Pages 116-125
Journal: Geoderma - Volume 323, 1 August 2018, Pages 116-125
نویسندگان
Lei Xiong, Peng Wang, Peter M. Kopittke,