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頁籤選單縮合
題名 | 土壤奈米粒子研究之探討=Study on Natural Soil Nanoparticles: A Review |
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作者姓名(中文) | 曹崇銘; 王亞男; 王明光; | 書刊名 | 國立臺灣大學生物資源暨農學院實驗林研究報告 |
卷期 | 24:4=270 2010.12[民99.12] |
頁次 | 頁227-236 |
分類號 | 434.22 |
關鍵詞 | 環境奈米粒子; 高嶺石; 針鐵礦; 赤鐵礦; 磚紅壤; Environmental nanoparticles; Kaolinite; Goethite; Hematite; Laterite; |
語文 | 中文(Chinese) |
中文摘要 | 在自然環境系統內如土壤、水體、河川、湖泊、海洋、大氣和霧等之中,大量存在著奈米粒子。在污染物和養份的循環過程中,這些膠體粒子(1-1000nm)扮演著很重要的角色,特別是奈米粒子(1-100nm),除了具有高表面活性及比表面積之外,它對於吸附或鍵結重金屬及有機化合物的能力非常強。目前世界各主要開發國家都投入極大的財力、人力、物力積極進行各相關領域的奈米科技研究。過去由於大量收集及分離奈米材料不容易,故研究進展較慢。這篇文章的重點是探討土壤奈米粒子的分離及鑑定方法,包括不同粒徑大小的奈米粒子(<2000、450-2000、100-450、1-100nm)。利用自動超過濾儀器成功的克服了紅壤中大量收集土壤奈米粒子的問題。大量的赤鐵礦奈米粒子(4-7nm)出現在高嶺石奈米粒子的表面,並且聚集在層層重疊的高嶺石六角邊緣。使用同步輻射及傳統X-光繞射進行奈米粒子鑑定,發現同步輻射的X-光繞射可以鑑定高嶺石、伊萊石、針鐵礦及赤鐵礦存在於高風化的紅壤中。同步輻射的X-光繞射分析具備優異的高能量技術,可以鑑定奈米粒子的結晶構造及顆粒大小,特別是鐵氧化物及層狀矽酸鹽類等奈米粒子。透過相關文獻的整理與分析,我們認為臺灣在土壤奈米粒子的研究方面有極需開拓的空間,尤其是土壤奈米粒子的分離和鑑定方法。對於深入探討土壤奈米粒子將有助於在復育土壤環境時,可以從奈米尺度瞭解汙染物的吸附機制,以及對這些受土壤汙染的生態系進行有效率的復育及經營管理。 |
英文摘要 | Nanoparticles exist in natural systems such as soils, groundwater, streams, rivers, lakes, oceans, atmosphere and fogs. There has been a great deal of evidences indicating that organic and inorganic colloid particles (1-1000 nm) in natural systems play an important role in the pollutants and circulation processes of nutrients. In particular, nanoparticles (1-100 nm) are important in a natural system because of their surface reactivities, high surface areas and their associated properties of binding or adsorbing to trace metal contaminants and organic. Thus, several developed countries input a lot of main finances, powers and materials to emphasize the nanoparticle research. In the past, nanoparticle research was slowly developed due to not easy to collect abundant nanoparticles. This review article is focused on investigational method of separation and identification of soil nanoparticles (SNPs), including nanoparticles with size fractions in the range of <2000, 450 to 2000, 100 to 450 and 1 to 100 nm. An automated ultrafiltration device (AUD) was used successfully to overcome the problem of efficiently collecting SNPs in large quantities of red soils. A significant amount of hematite nanoparticles was present on the surface coating of kaolinite nanoparticles and aggregated hematite nanoparticles overlapping the edge of kaolinite flakes in a size ranged from 4 to 7 nm. Synchrotron and conventional XRD were used to characterize the nanoparticles, and showed evidence for the presence of kaolinite, illite, goethite and hematite by Synchrotron XRD in the nanoparticles of highly weathered red soils. Synchrotron XRD is straightforward and powerful technique for identifying nanoparticles, crystallinity, and particle size, particularly for the Feoxide and phyllosilicate nanoparticles. Through literature reviews, we found major gaps in SNPs studies needed to be filled in Taiwan, especially studies on separation and identification of SNPs are needed. Comprehensive studies of SNPs could make the investigation of adsorbing mechanism of contaminants in remediated environments at the nano-scale, and the remediation and management of soil pollution-impacted ecosystems more effectively. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。