title: One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water.
abstract: Mesoporous two-line (2-lines) ferrihydrite is successfully synthesized by a facile one-step method. The ferrihydrite is characterized by X-ray diffraction (XRD), Raman spectrum, N(2) adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The 2-lines ferrihydrite with mesoporous structure possesses excellent adsorption performance for arsenic (As(III)) contamination. Experimental results show that As(III) contamination can be effectively removed within 2 h by this 2-lines ferrihydrite, which is attributed to the special mesoporous structure and large surface area (133 m(2) g(-1)). The As(III) loading capacity of our obtained mesoporous 2-lines ferrihydrite is up to 128 mg(As) g(-1)(Fe). In addition, As(III) can be easily desorbed from 2-lines ferrihydrite by simple heat treatment in alkali solution. After reusage for 10 times, it still presents good adsorption performance, indicating the excellent stability of the 2-lines ferrihydrite. Furthermore, the mesoporous 2-lines ferrihydrite is also effective for As(III) removal when some natural water constituents are present. Therefore, the high adsorption capability of the mesoporous 2-lines ferrihydrite makes it a potentially attractive adsorbent for the removal of As(III) contamination from natural water.
authors.affiliation: Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin, 150086, People's Republic of China.
authors.forename: Zhenzi
authors.initials: Z
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.forename: Kang
authors.initials: K
authors.lastname: Li
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry*; D005290:Ferric Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D010316:Particle Size; D016062:Porosity; D013059:Spectrum Analysis, Raman / Q000379:methods; D013499:Surface Properties; D014867:Water; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000633:toxicity; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; D014867:Water; C092844:ferric oxyhydroxide; D001151:Arsenic