DOI: 10.1016/j.watres.2018.11.057
Scopus记录号: 2-s2.0-85058402243
论文题名: Competitive removal of Pb2+ and malachite green from water by magnetic phosphate nanocomposites
作者: Zhang F. ; Tang X. ; Huang Y. ; Keller A.A. ; Lan J.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 442
结束页码: 451
语种: 英语
英文关键词: Magnetic phosphate nanocomposites
; Mechanism
; Selective removal
; Simultaneous removal
; Water treatment
Scopus关键词: Carbonate minerals
; Dyes
; Hydrogen bonds
; Ion exchange
; Iron oxides
; Lead compounds
; Magnetic separation
; Magnetite
; Mechanisms
; Nanocomposites
; Nanomagnetics
; Water treatment
; Adsorbent dosage
; Effective materials
; Isothermal adsorption
; Material's surface
; Positively charged
; Pseudo-second order model
; Selective removal
; Simultaneous removal
; Lead removal (water treatment)
; lead
; magnetic nanoparticle
; malachite green
; nanocomposite
; phosphate
; water
; adsorption
; composite
; ion exchange
; lead
; malachite
; parameterization
; phosphate
; pollutant removal
; water treatment
; adsorption
; adsorption kinetics
; Article
; controlled study
; environmental temperature
; heavy metal removal
; hydrogen bond
; ion exchange
; magnetic separation
; priority journal
; rate constant
; static electricity
; surface property
英文摘要: The competitive removal of Pb2+ and malachite green (MG) from water by three magnetic phosphate nanocomposites (Fe3O4/Ba3(PO4)2, Fe3O4/Sr5(PO4)3(OH), and Fe3O4/Sr5xBa3x(PO4)3(OH), namely “FBP”, “FSP”, and “FSBP”, respectively) was systematically investigated compared with Fe3O4 (“F”) nanoparticle. Temperature and adsorbent dosage for competitive removal were optimized to be 20 °C and 0.05 g in 50 mL. The kinetic and isothermal adsorption results were fitted well with the pseudo-second-order model and Langmuir model, respectively. In the competitive removal process, FSP showed a high affinity to Pb2+ (202.8 mg/g) while FBP possessed high selectivity for MG (175.4 mg/g), and FSBP was effective at simultaneous removal of Pb2+ and MG, with a capacity of 143.7 and 90.9 mg/g, respectively. The magnetic contents in nanocomposites allow magnetic separation of materials from the water after treatment. We proposed that the simultaneous removal mechanism by FSBP was due to ion exchange between Pb2+ and Sr2+ in the lattice and then the formation of hydrogen bonds between PO4 3− outside the material's surface and positively charged hydrogen in MG. This study indicates the potential of these phosphate nanocomposites to be used as effective materials for selective or simultaneous removal of Pb2+ and MG from water. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122078
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: College of Science, Nanjing Agricultural University, Nanjing, 210095, China; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, United States; College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
Recommended Citation:
Zhang F.,Tang X.,Huang Y.,et al. Competitive removal of Pb2+ and malachite green from water by magnetic phosphate nanocomposites[J]. Water Research,2019-01-01