国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

產(chǎn)品推薦:氣相|液相|光譜|質(zhì)譜|電化學(xué)|元素分析|水分測定儀|樣品前處理|試驗機|培養(yǎng)箱


化工儀器網(wǎng)>技術(shù)中心>儀器文獻(xiàn)>正文

歡迎聯(lián)系我

有什么可以幫您? 在線咨詢

BI-200SM研究級動靜態(tài)光散射應(yīng)用案例-4

來源:美國布魯克海文儀器公司   2014年10月16日 17:13  
 文獻(xiàn)名: XAFS study of starch-stabilized magnetite nanoparticles and surface speciation of arsenate
 
作者: Meiyi Zhanga, Gang Pana , Dongye Zhaob, Guangzhi Hea
a State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China
b Environmental Engineering Program, Department of Civil Engineering, 238 Harbert Engineering Center, Auburn University, Auburn, AL 36849, USA
 
摘要:It has been shown that starch can effectively stabilize nanoscale magnetite particles, and starch-stabilized magnetite nanoparticles (SMNP) are promising for in situ remediation of arsenic-contaminated soils. However, a molecular level understanding has been lacking. Here, we carried out XAFS studies to bridge this knowledge gap. Fe K-edge XAFS spectra indicated that the Fe–O and Fe–Fe coordination numbers of SMNP were lower than those for bare magnetite particles, and these coordination numbers decreased with increasing starch concentration. The decrease in the average coordination number at elevated stabilizer concentration was attributed to the increase in the surface-to-volume ratio. Arsenic K-edge XAFS spectra indicated that adsorbed arsenate on SMNP consisted primarily of binuclear bidentate (BB) complexes and monodentate mononuclear (MM) complexes. More BB complexes (energetically more favorable) were observed at higher starch concentrations, indicating that SMNP not only offered greater adsorption surface area, but also stronger adsorption affinity toward arsenate.
 
關(guān)鍵詞:Magnetite nanoparticle; Starch; Stabilization; XAFS; Arsenic removal
 

免責(zé)聲明

  • 凡本網(wǎng)注明“來源:化工儀器網(wǎng)”的所有作品,均為浙江興旺寶明通網(wǎng)絡(luò)有限公司-化工儀器網(wǎng)合法擁有版權(quán)或有權(quán)使用的作品,未經(jīng)本網(wǎng)授權(quán)不得轉(zhuǎn)載、摘編或利用其它方式使用上述作品。已經(jīng)本網(wǎng)授權(quán)使用作品的,應(yīng)在授權(quán)范圍內(nèi)使用,并注明“來源:化工儀器網(wǎng)”。違反上述聲明者,本網(wǎng)將追究其相關(guān)法律責(zé)任。
  • 本網(wǎng)轉(zhuǎn)載并注明自其他來源(非化工儀器網(wǎng))的作品,目的在于傳遞更多信息,并不代表本網(wǎng)贊同其觀點和對其真實性負(fù)責(zé),不承擔(dān)此類作品侵權(quán)行為的直接責(zé)任及連帶責(zé)任。其他媒體、網(wǎng)站或個人從本網(wǎng)轉(zhuǎn)載時,必須保留本網(wǎng)注明的作品第一來源,并自負(fù)版權(quán)等法律責(zé)任。
  • 如涉及作品內(nèi)容、版權(quán)等問題,請在作品發(fā)表之日起一周內(nèi)與本網(wǎng)聯(lián)系,否則視為放棄相關(guān)權(quán)利。
企業(yè)未開通此功能
詳詢客服 : 0571-87858618
玉溪市| 鄂尔多斯市| 兖州市| 桑植县| 海原县| 获嘉县| 沁水县| 磐石市| 班玛县| 保康县| 图们市| 前郭尔| 信丰县| 天津市| 仲巴县| 泰兴市| 公安县| 扶风县| 舒城县| 中牟县| 澄城县| 积石山| 景谷| 神木县| 左权县| 苗栗市| 永寿县| 亚东县| 普宁市| 林甸县| 清涧县| 靖安县| 涟水县| 民丰县| 鄂伦春自治旗| 客服| 江北区| 比如县| 龙游县| 黄陵县| 额敏县|