Phosphate removal using aluminum-doped magnetic nanoparticles

Abstract

Modern industrial waste waters often contain high concentrations of phosphate, and many methods have been explored to aid in its removal. This study investigates the use of magnetic nanoparticles as an adsorbent for phosphate removal. Aluminum-doped magnetic nanoparticles were synthesized using aco-precipitation method. Structure and composition analysis of the prepared magnetic nanoparticles indicated an inverse spinal structure with a composition of FeAl 0.75 Fe 1.25 O 4. These nanoparticles were tested for their phosphate removal properties, including adsorption capacity, selectivity, and kinetic models. They showed great affinity to phosphate with a maximum adsorption capacity of 102 mg/g. Additionally, the adsorption was selective, and the presence of other common anions and organic matters did not interfere with the phosphate adsorption efficacy. The kinetic analysis of phosphate adsorption suggested a pseudo-second-order adsorption behavior, and the adsorption isotherm studies indicated a Langmuir type adsorption. The phosphate removal capabilities of the nanoparticles were also tested in poultry rinsing water, tap water, and municipal wastewaters, all with high phosphate removal efficiency. The overall results from these experiments showed promising results for the phosphate removal efficacy of these nanoparticles.

Adsorption of Phosphate and Polyphosphate on Nanoceria Probed by DNA Oligonucleotides

“…Given the complexity of phosphate chemistry, it is important to have a systematic understanding of its adsorption on metal oxides. Such understandings are useful for biosensor development, biomineralization, regulating the catalytic activity of metal oxides (called nanozymes), , and environmental remediation. − Taking advantage of DNA being a polyphosphate and the fluorescence quenching property of many materials, − we reason that it might be possible to use DNA as a probe to understand the adsorption of various phosphates. ,, In this work, we performed a comprehensive study of the interaction between various phosphate species and a model metal oxide, CeO 2 . Quantitative measurements using isothermal titration calorimetry (ITC) were also carried out.…”

Artificial intelligence, sensors, robots, and transportation systems drive an innovative future for poultry broiler and breeder management

“…From a sustainability perspective, future poultry farms could be equipped with technologies to extract higher value materials and nutrients from traditional waste. This includes advanced adsorbing material to capture ammonia from poultry house ambient air or bioreactors to remove phosphorous species from chicken litter to be used as soil amendments ( Xu et al, 2017 ).…”

Phosphate Capture Enhancement Using Designed Iron Oxide-Based Nanostructures

“…Furthermore, it was demonstrated that doping of iron oxide is also a promising approach to improve phosphate uptake [ 4 , 13 , 14 , 15 , 16 , 17 , 18 ]. Table 1 presents some studies on how the doping of spinel iron oxide nanoparticles may increase the phosphate adsorption capacity.…”

“…Tables summarizes the parameter values corresponding to this fitting; Table S6: Adsorption isotherm results for different iron oxide-based materials; Table S7: Adsorption isotherm results of different aluminum doped ferrite materials. References [ 4 , 5 , 6 , 7 , 8 , 11 , 14 , 23 , 24 , 28 , 32 , 33 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ] are cited in the Supplementary Materials.…”