AI Article Synopsis
- A new, cost-effective magnetic enhanced flocculation (MF) method was developed for removing low-concentration oil contaminants from water, achieving over 95% removal efficiency in just one minute.
- The study introduced novel indices Rand S to evaluate oil removal effectiveness using in-situ UV-Abs measurements, highlighting a shift in adsorption kinetics with the addition of different flocculants like FeO and PAM.
- The mechanism of MF was identified as enhanced charge neutralization and hydrogen bond adsorption, and promising results were noted for the potential reuse of low-cost magnetic seeds in sustainable water treatment.
Article Abstract
For the low-concentration oily micro-polluted water formed by the leakage of refined oil products, an unexpensive and high-efficiency magnetic enhanced flocculation method was introduced in this study. First, the performance of magnetic flocculation(MF) to remove oily contaminants was discussed. The results indicated that it achieved more than 95% removal in only 1min with 50mg/L-Polyaluminum chloride(PAC), 50mg/L-FeO and10mg/L- Polyacrylamide (PAM). The novel indexs Rand S were proposed to evaluate the oil removal with UV-Abs in-situ method. According to the adsorption kinetics of oil contaminants, the adsorption kinetics changed from pseudo-first-order to pseudo-second-order kinetics after the addition of FeO on the basis of conventional coagulation (CF). It was transformed into intraparticle diffusion kinetics when the PAM continued to be added. Combined with the Fe-O-Al bond in the FTIR spectrum of flocs, the main mechanism of MF is enhanced charge neutralization and hydrogen bond adsorption. In addition, it was shown that satisfactory oil removal after recover, which indicated the great potential of a sustainable way by reusing low-cost magnetic seeds.
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| http://dx.doi.org/10.1016/j.jenvman.2019.05.068 | DOI Listing |
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The investigation on FeO magnetic flocculation for high efficiency treatment of oily micro-polluted water.
J Environ Manage
August 2019
School of Environmental Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China.
Article Synopsis
- A new, cost-effective magnetic enhanced flocculation (MF) method was developed for removing low-concentration oil contaminants from water, achieving over 95% removal efficiency in just one minute.
- The study introduced novel indices Rand S to evaluate oil removal effectiveness using in-situ UV-Abs measurements, highlighting a shift in adsorption kinetics with the addition of different flocculants like FeO and PAM.
- The mechanism of MF was identified as enhanced charge neutralization and hydrogen bond adsorption, and promising results were noted for the potential reuse of low-cost magnetic seeds in sustainable water treatment.
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