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Evaluation of oilfield‐produced water treated with a prepared magnetic inorganic polymer: Poly(silicate aluminum)/magnetite
Author(s) -
Cai Dan,
Zhang Tailiang,
Zhang Fangjie
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45735
Subject(s) - materials science , chemical engineering , silicate , magnetite , polymer , scanning electron microscope , coagulation , fourier transform infrared spectroscopy , nanoparticle , composite material , nanotechnology , metallurgy , psychology , psychiatry , engineering
In this study, novel coagulant poly(silicate aluminum)/Fe 3 O 4 nanoparticles (PFeNPs) were prepared via magnetic iron oxide nanoparticles (FeNPs) modified by poly(silicate aluminum) (PSA). The physiochemical properties of the PFeNPs were investigated with Fourier transform infrared spectroscopy, X‐ray diffraction, scanning electron microscopy, and ζ‐potential metric analysis. The effect of the aging time on the Al distribution of the PFeNPs was analyzed by the Al‐Ferron timed complex colorimetric method. Oilfield‐produced water was used for the assessment of the coagulation performances. The fractal dimensions, formation, breakage, and regrowth of the flocs were studied in turn. The experimental results show that the PFeNPs exhibited a porous layer of a net structure, and the PSA grafted onto the PFeNPs via SiOFe enhanced the positive charge of the FeNPs. Meanwhile, the coagulation performance of the PFeNPs on total organic carbon, the turbidity, and the calcium removal were beyond 98%. In addition, the moisture content of the flocs derived from the PFeNPs was 68.7% (it is normally > 98%). We found that the compactness of the flocs derived from the PFeNPs was far greater than those of PSA. This will provide new sight into the preparation of magnetic single‐phase inorganic polymer coagulants. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45735.