Phosphorus removal from aqueous solution by nanoscale zero valent iron in the presence of copper chloride

Struvite crystallization combined adsorption of phosphate and ammonium from aqueous solutions by mesoporous MgO⿿loaded diatomite

“…Up to date, numerous methods such as ammonia stripping, chemical treatment, struvite crystallization, zeolite adsorption, and biological nitrification-denitrification have been developed to remove NH4 + from wastewater [5]. As for phosphorus, technologies including adsorption, biological treatment and chemical precipitation have been used [6][7][8]. Among these technologies, struvite crystallization has been broadly used for simultaneous recovery of nutrients from human urine, swine wastewater, sludge supernatant and landfill leachate [9][10][11][12][13].…”

Performance of granular activated carbon/nanoscale zero valent iron for removal of humic substances from aqueous solution based on Experimental Design and Response Surface Modeling

“…In the Eljamal et al study, XRD spectra show that there was main peak intensity of NZVI at 44.8° indicating the presence of zero-valent iron in the synthesized nanoscale iron (Eljamal et al, 2016). In Dong et al study, the peaks 45 and 65 should be assigned to zero iron (Dong et al, 2016).…”

“…The findings of Eljamal et al indicate the experimental data followed the pseudo-first-order kinetic model with a high coefficient of determination (R 2 =0.99 at pH=7). Adsorption of PO4 -3 using nZVI in acidic conditions had the highest reaction rate (removal efficiency 99.4 % at pH=2 and k1= 10.56 h -1 (Eljamal et al, 2016). Dong et al carried out the kinetic study of Cr (VI) reduction in the absence and presence of FA using kinetic models (three types).…”

“…For these reasons, zero-valent iron (Fe°) has been more attention: abundance, inexpensive, non-toxic, fast reaction, high efficiency in removing contaminants from water (Fu et al, 2015). Zerovalent iron is used very widely to remove various compounds such as chromium (VI) and lead (II) (Fu et al, 2015, Sheng et al, 2016, Qian et al, 2017, phosphorus (Eljamal et al, 2016), nitrobenzene , trichlorophenol (Chang et al, 2015), heavy metals (Li et al, 2017), phenol (Diao et al, 2016), norfloxacin , nitrate and phosphate (Khalil et al, 2017).…”

Application of Zno-Fe3O4nano Composite on the Phosphate Removal from Aqueous Solutions: Optimization and Statistical Modeling

“…Among the conventional phosphorus removal methods, sorption methods using the appropriate solid materials can be promising at lower phosphate concentrations, which pose a challenge to the use of the traditional flocculation methods 7 . Many kinds of materials have the potential to remove phosphorus from water, and many materials including waste products have attracted widespread interest due to their potential ability for phosphorus remove, including nZVI 8 ,Clayey peat 9 , Laterite and Red earth 6 Clinoptilolite 10 ,ACFNano HFO 11 ,) ZrO 2 12 sands 13 , fly ash 14 , slag 14 , iron oxide tailings 15 , Ca-based sorbents 16 , alunite 17 , RM, RM700, RMAH 16 , Ca-dolomite, Raw-dolomite 16 and iron-based compounds 7 .Among various nano sized materials, ZnO and Fe 3 O 4 have much attention because ZnO nanoparticles exhibit an efficient photo catalytic removal efficiency through adsorption and decomposition of organic contaminants 18 .Today Most of the studies about phosphate adsorbents have focused on the on the nanoparticles due to the importance of selecting substrates with the highest P adsorption capacity to maximize phosphorus removal. In addition, super paramagnetic Fe 3 O 4 nanoparticles possess a promising adsorption capacity for contaminants along with optimal magnetic properties, showing rapid separation of the adsorbent from solution via a magnetic field 19,20 .…”