CAJ | 학술논문

铁的氢氧化合物稳定相针铁矿（α-FeOO H ）及四方纤铁矿（β-FeOO H ）的合成材料因具有纳米颗粒粒径、较高比表面积，在工业生产和环境治理中被广泛应用。α，β-FeOO H作为重金属等污染物的吸附材料尤受关注。但其合成过程中溶液pH值和反应条件（如不同温度下加热或室温磁力搅拌等）对α，β-FeOO H矿物材料晶型、颗粒形貌、尺寸和界面特性的影响及其与矿物环境功能的相关性报道较少。故本工作基于Fe（NO3）3和FeCl3溶液在一定pH值范围内分别易于形成α-FeOOH和β-FeOOH稳定相，利用X射线衍射仪、透射/扫描电子显微镜和激光粒度分析仪对加热（40和70℃）和磁力搅拌（25℃）条件下形成的矿物α，β-FeOO H的晶型和颗粒形貌结构进行了鉴定与表征，同时利用红外光谱仪测定了矿物表面的特征结构基团。研究结果表明，40和70℃反应温度下形成的矿物Aka-T40，Aka-T70，Gth-T70具有颗粒均一、结晶型较好、比表面积较大等特性，是良好的去除环境污染物的吸附剂材料。
철적경양화합물은정상침철광（α-FeOO H ）급사방섬철광（β-FeOO H ）적합성재료인구유납미과립립경、교고비표면적，재공업생산화배경치리중피엄범응용。α，β-FeOO H작위중금속등오염물적흡부재료우수관주。단기합성과정중용액pH치화반응조건（여불동온도하가열혹실온자력교반등）대α，β-FeOO H광물재료정형、과립형모、척촌화계면특성적영향급기여광물배경공능적상관성보도교소。고본공작기우Fe（NO3）3화FeCl3용액재일정pH치범위내분별역우형성α-FeOOH화β-FeOOH은정상，이용X사선연사의、투사/소묘전자현미경화격광립도분석의대가열（40화70℃）화자력교반（25℃）조건하형성적광물α，β-FeOO H적정형화과립형모결구진행료감정여표정，동시이용홍외광보의측정료광물표면적특정결구기단。연구결과표명，40화70℃반응온도하형성적광물Aka-T40，Aka-T70，Gth-T70구유과립균일、결정형교호、비표면적교대등특성，시량호적거제배경오염물적흡부제재료。
In the present work ,based on the stable phase of α-FeOOH and β-FeOOH easily formed in ferric solutions of Fe (NO3 )3 and FeCl3 at the appropriate pH values ,respectively ,the phase and crystallizability ,morphologies and sizes for the par-ticles of FeOOH minerals prepared under the conditions of heating at 40 and 70 ℃ ,and magnetic stirring at 25 ℃ were identified and examined by X-ray diffraction (XRD) ,transmission/scanning electron microscopy (TEM/SEM) and laser scattering particle analyzer .Meanwhile the surface chemistry properties were also detected and analyzed by Fourier transform infrared spectrometer (FTIR) .Investigation results showed that the prepared minerals Gth-T70 (α-FeOOH) ,Aka-T40 and Aka-T70 (β-FeOOH) have good properties of nanocrystallity ,homogeneous particles and higher specific surface areas ,which induced that the aboveα,β-FeOOH are potentially excellent adsorbent materials for removal of some contaminants in circumstances .