Ferric Salts Research Articles

Holistic Approach to Phosphorus Recovery from Urban Wastewater: Enhanced Biological Removal Combined with Precipitation

Combined phosphorus (P) removal and recovery from wastewater is a sensible and sustainable choice in view of potential future P-resource scarcity, due to dwindling primary global reserves. P-recovery from wastewater, notwithstanding the relatively small fraction of total global amounts involved (less than 1/5 of total global use ends up in wastewater) could extend the lifespan of available reserves and improve wastewater cycle sustainability. The recovery of the resource, rather than its mere removal as ferric or aluminum salt, will still allow to achieve protection of receiving waters quality, while saving on P-sludge disposal costs. To demonstrate the possibility of such a recovery, a strategy combining enhanced biological phosphorus removal and mineral P-precipitation was studied, by considering possible process modifications of a large treatment facility. Process simulation, a pilot study, and precipitation tests were conducted. The results demonstrated that it would be possible to convert this facility from chemical -precipitation to its biological removal followed by mineral precipitation, with minimal structural intervention. Considerable P-recovery could be obtained, either in form of struvite or, more sustainably, as calcium phosphate, a mineral that also has possible fertilizing applications. The latter would present a cost about one order of magnitude lower than the former.

Homogeneous solar Fenton and alternative processes in a pilot-scale rotatable reactor for the treatment of petroleum refinery wastewater

Applicability of the solar Fenton process for the treatment of a real refinery wastewater was investigated. A novel solar-reactor was used with the capability of automatic rotating against the sun, enabling maximum utilization of direct and single reflective sunlight beams. The COD and TOC criteria were measured to follow the pollutants removal. Results revealed optimal operating conditions of 694.7mg/L hydrogen peroxide, 67.3mg/L ferrous salt and solution pH of 3.2. Under these conditions, COD and TOC were, respectively, decreased to 79.6 and 73.2 % after 180min sunlight envision. For comparison, alternative H2O2 / Fe2+, S2O82- / Fe2+, NaOCl / Fe2+, NaOCl, S2O82- and H2O2 processes, all activated with sunlight, were performed. The present pollutants were identified by means of the GC/MS headspace technique, showing significant removal of the majority of petroleum aliphatic and aromatic hydrocarbons and that biodegradability was feasible since BOD5/COD reached from 0.36 to 0.62. The process performance was compared with the previously reported similar processes for treating specified pollutants and wastewaters. High preference of the employed process using the particular solar-reactor was probed based on different criteria. Meanwhile, the total operating costs was estimated to be quite low, compared to other processes.

Synthesis and Application of a Powerful Heterogeneous Photo-Fenton Catalyst Based on rGO/g-C3N4/Fe3O4/tiO2 Nano-Composite for the Removal of Sewage Contaminants

The reduced GO/g-CN/Fe3O4 nano-composite was prepared by the co-precipitation of pre-hydrolyses ferric and ferrous salts in the presence of GO/g-CN hybrid. Structural and morphological characterization of the synthesized rGO/g-CN/Fe3O4/TiO2 nano-composite were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Their photo-Fenton catalytic performance under UV–visible light irradiation was evaluated by UV–vis spectrophotometry and electrochemical methods. The influence of heterogeneous catalyst composition on the MB degradation efficiency was examined and optimized. The highest MB degradation efficiency of ternary rGO/g-CN/Fe3O4 was 53% under UV light. Addition of nano TiO2 to the nano-composite effectively improved its photo-Fenton degradation efficiency (up to 97% within 20 min). As excellent conductive carrier, rGO connected g-CN to TiO2 and effectively separated photo-created electrons and holes. Uniform dispersion of g-CN on the rGO surface caused full harvest of incident light and more efficient interaction with pollutants. The significant improvement of photo-Fenton catalytic effect of rGO/g-CN/Fe3O4/TiO2 is attributed to the synergetic interaction and availability of the active catalytic centers that effectively facilitated the Fe3+/Fe2+ recycling. Experimental results confirmed the promising dual purpose application, photo-Fenton and adsorption properties of rGO/g-CN/Fe3O4/TiO2 nano-composite in wastewater treatment.

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment.

The current method of treating arsenic-containing wastewater is mainly to use a calcium method to synthesize stable calcium arsenate. It is easy to cause reverse dissolution by rain or other erosion, releasing arsenic into the natural world and polluting soil and groundwater. So, calcium arsenate is not an ideal material for removing and immobilizing arsenic. Iron arsenate (FeAsO4) is much better than calcium arsenate because of its stability and acid resistance. In this study, calcium arsenate@iron arsenate coating materials were synthesized. From the results of the XRD and SEM analyses, it was shown that calcium arsenate was coated by an iron arsenate shell which consisted of nanoparticles. The stability of the coating materials was determined using the Toxicity Characteristic Leaching Procedure (TCLP). The results showed that the concentrations of As for CaHAsO4 and Ca3(AsO4)2 were 744 mg L−1 and 302.2 mg L−1, respectively. Arsenic was not detected through the TCLP tests for CaHAsO4@FeAsO4 and Ca3(AsO4)2@FeAsO4 coating materials, and the best coating condition was confirmed to be an Fe/As molar ratio of 4 : 1, pH of 4, and temperature of 50 °C. The stability of the materials showed a significant improvement. The results indicated that calcium arsenate materials could be converted to coating materials by using ferric salts. The coating materials had excellent stability in an aqueous solution. Thus, the coating was suitable for the removal and immobilization of arsenic in industrial applications. This work provided a new way to treat arsenic-containing wastewater, which was simple and economical. This method has potential for use in the field of wastewater treatment containing arsenic.

Emergency water treatment with combined ferrate(vi) and ferric salts for disasters and disease outbreaks

Clean water is vital amid a disaster or disease outbreak-related emergency.

The role of a chemical loop in removal of hazardous contaminants from coke oven wastewater during its treatment

AbstractCoke oven liquor is one of the most contaminated liquid streams generated by the coal processing industry, thus its proper treatment and utilization is crucial for sustainable and environmentally neutral plant operation. The conventional wastewater treatment process comprises of chemical and biological processes. Within the current research the detailed role of chemical treatment is described. Commercially available iron-based coagulants (PIX100, PIX100COP, PIX113, PIX116) were tested to understand their removal efficiency and impact on the stream parameters. The influence of iron dose in the range of 300-500 mgFe/L on the process performance was also examined.It was found that the main role of chemical treatment was to bind toxicants harmful to activated sludge microorganisms, i.e. free and complex cyanides and sulphides. Among the tested iron-based conventional coagulants ferrous salts were more efficient than ferric salts. It was also observed that efficiency of the process strongly depended on wastewater properties (especially in regard to pH, which should be in the range of 9-10) and the coagulant selection needed to be done individually for a given wastewater type. The removal rates of particular contaminants were diversified and for free cyanides, complex cyanides and sulphides they were in the range of 23-91%, -156-77% and -357-98%, respectively. The expected, simultaneous removal of chemical oxygen demand (COD) during the treatment was not observed and even the parameter value increased after the process due to probable formation of compounds less vulnerable to oxidation.

Stabilization treatment of arsenic-alkali residue (AAR): Effect of the coexisting soluble carbonate on arsenic stabilization

Arsenic-alkali residue (AAR) from antimony smelting is highly hazardous due to its ready leachability of As, seeking for proper disposal such as stabilization treatment. However, As stabilization in AAR would be challenging due to the high content of coexisting soluble carbonate. This study conducted the stabilization treatments of AAR by ferrous sulfate and lime, respectively, and revealed the significant influence of coexisting carbonate. It was found that ferrous sulfate was more efficient than lime, which required only one-tenth of dosages of lime to reduce the As leaching concentration from 915 mg/L to a level below 2.5 mg/L to meet the Chinese regulatory limit. The combining qualitative and quantitative analyses based on XRD, SEM–EDS, and thermodynamic modeling suggested that the formation of insoluble arsenate minerals, ferrous arsenate or calcium arsenate, was the predominant mechanism for As stabilization in the two treatment systems, and their efficiency difference was primarily attributed to the coexisting carbonate, which had a slight effect on ferrous arsenate but severely obstructed calcium arsenate formation. Moreover, the examination of As leaching concentrations in 1-year-cured samples indicated that the long-term stability of ferrous sulfate treatment was far superior to that of lime treatment. This study provides ferrous salts as a promising and green scheme for stabilization treatment of AAR as well as other similar As-bearing solid wastes with coexisting soluble carbonate.

Application of tannic acid and ferrous ion complex as eco-friendly flame retardant and antibacterial agents for silk

Traditional flame retardants (FRs) for textiles are limited by toxicity, environmental persistence and bioaccumulation. There is an urgent need to develop environmentally benign FRs. For this purpose, the combination of tannic acid (TA, a specific form of hydrolysable tannin) and ferrous ion was applied to simultaneously impart durable FR and antibacterial functions to silk fabric. A ternary TA-ferrous ion-silk complex was fabricated by adsorption of TA on silk followed by mordanting with ferrous salt. After treated with 20% TA (on the weight of fabric) and 2 g/L ferrous sulfate, silk fabric exhibited an obvious increase in limiting oxygen index from 23.6% to 27.5%, a significant decrease in damaged length from 30.0 to 11.2 cm after vertical burning, and a significant increase in antibacterial rate from 22% to 95%. Even after 20 washes, the treated fabric still had the same FR ability as the unwashed one, and an antibacterial rate of above 90%, exhibiting excellent washing durability. The high thermal stability of the treated fabric in nitrogen indicated the formation of a ternary TA-ferrous ion-silk complex which was responsible for excellent washing durability. The observation on the morphological structure of charred products from vertical burning revealed the good charring capability of the treated fabric which contributed to enhanced FR behavior. This research proposes an eco-friendly FR treatment for silk and a novel application of hydrolysable tannins in the FR modification of textiles.

Turbidity, COD and Total Suspended Solid Removal: Application of Natural Coagulant Cassava Peel Starch

Considering techno-financial oblige, cassava peel (CP) that is effectively accessible mechanical waste is concentrated to assess its appropriateness to be chosen as coagulant help for the water treatment framework. The process called coagulation and flocculation is the generation of consumable water from most raw water sources generally incorporates. The most well-known coagulant used in water treatment are aluminium salts, ferric salts and synthetic polymers. These coagulants are frequently costly and can hardly afford the costs of imported chemicals. Considering techno-economic constrain, cassava peel (CP) that is effectively accessible industrial waste is concentrated to assess its appropriateness to be chosen as coagulant aid for water treatment system. This aim for characterize cassava peel and to optimize coagulation and flocculation process using alum, CPS and alum : CPS. There are two types of equipment analysis involve to characterization the cassava peel namely scanning electron microscope (SEM-EDX) equipped with energy dispersive X-ray spectrometer (EDX) and X-ray fluorescence (XRF) spectrometry. SEM-EDX micrograph had shown that the surface of the cassava peel samples was secured with smooth and globular in formed of bound a starch granule. The CP samples contain Fe2O3 and Al2O3 were analysis by XRF spectrometry indicated that which might contribute to its coagulation ability. The water samples used was collected at the water intake from Sembrong Dam. The raw water sample was characterized before the process of jar test. Jar test experiment was carried out by using alum, cassava peel starch and cassava peel + alum. The laboratory analysis was carried on turbidity, total suspended solid and COD removal. Recommended conditions (initial pH 9, 70 : 30 % of alum : CPS, and 60 min settling time) allowed Cassava peel and alum removed high turbidity, total suspended solid and chemical oxygen demand up to 90.32%, 89.86% and 18.87%, respectively. The effectiveness of cassava peel as coagulant aid was investigated from floc analysis. Besides that, based on the results with using SEM analysis, the images showed that the combination of alum +CPS was more compact and this can make denser because of the bridging of the particles that easy the floc to settle down. This study proved the use of natural coagulant from cassava peel as an alternative coagulant aid to reduce the usage of chemical coagulants.

Magnetic bio-activated carbon production from lignin via a streamlined process and its use in phosphate removal from aqueous solutions

Lignin and ferrous salt were mechanically mixed, melted, carbonized and steam activated to produce magnetic bio-activated carbons (MBACs). Phosphate adsorption capacity measurement was conducted on representative MBAC, which has a high surface iron oxide proportion and mesoporous volume. The results indicate that iron species are embedded into the carbon matrix by lignin melting. Steam is not only an activation agent for pore generation and widening but is also effective for the oxidization of Hagg iron carbide produced via ferrous salt decomposition and subsequent reduction during the carbonization process to form magnetite. The porous and magnetic properties and surface iron oxide content of the produced MBACs can be modified by controlling the steam/magnetic biochar (MBC) ratio. The MBAC production process is streamlined and novel, compared with conventional coprecipitation or impregnation methods. The maximum phosphate adsorption onto the representative MBAC product using the best fitting model, i.e., the Langmuir-Freundlich model, is estimated to be 21.18 mg/g, suggesting that the representative MBAC product has a comparable phosphate adsorption capacity to most of the reported MBCs and MBACs.

A novel micro-ferrous dosing strategy for enhancing biological phosphorus removal from municipal wastewater

Ferrous salts have been widely used to enhance phosphorus removal in full-scale wastewater treatment plants, with an average dosage of 0.24–0.35 mM. However, such high dosage inevitably caused serious concerns on operation, potential biological toxicity and excessive sludge production. Thus, this study investigated the effect of micro-dosing of ferrous salt at the level of 0.02 mM on enhanced biological phosphorus removal (EBPR) in sequencing batch reactors. Results showed that micro-dosing of ferrous salt enhanced the overall performance, with average COD, TN and TP removal of more than 4.2%, 2.0% and 5.8%, respectively. In addition, the sequencing analysis further revealed that micro-ferrous dosing could significantly improve the diversity and richness of the microbial community (p < 0.05), whereas the regular dosing of ferrous salts (0.25 mM) negatively impacted on the EBPR performance. It was found that the abundances of phosphorus accumulating organisms (PAOs) in R2 (micro-dosing) were nearly 1.5-fold and 2-fold higher than those in R1 (control) and R3 (regular dosing). The contributions of biological and chemical pathways towards the observed phosphorus removal were also determined according to the phosphorus releasing rate. For micro-dosage and regular dosage of ferrous salts, phosphorus removal mainly relied on biological phosphorus removal and chemical phosphorus removal, respectively. It appears from this this study that the micro-ferrous dosing strategy is practically feasible and economically viable for enhanced phosphorus removal from municipal wastewater.

Ethylene glycol assisted synthesis of hierarchical Fe-ZSM-5 nanorods assembled microsphere for adsorption Fenton degradation of chlorobenzene

A unique zeolite catalyst, Fe doped ZSM-5 microsphere assembled by uniform nanorod-like crystals with hierarchical pore structure, was successfully synthesized and applied for the adsorption and degradation of trace chlorobenzene (CB) in the presence of H2O2. The organic ferric salts as the precursors, ethylene glycol as a chelating/reducing agent and the dynamic two-stage temperature-varied hydrothermal technique, together made the synthesized hierarchical Fe-ZSM-5 nanorods assembled microspheres (FZ-CA-5EG) to be characterized by abundant highly dispersed and valency-controlled framework Fe3+/2+ species. As a result of these features, the FZ-CA-5EG showed excellent ability of adsorption and degradation efficiency of CB, and enhanced durability due to negligible leaching of framework Fe species. Moreover, the hydroxyl radicals were determined as the main the reactive oxygen species of CB oxidation degradation, and a possible adsorption-oxidation degradation pathway was proposed.

Sorption properties of modifiers of piezoquartz resonators based on 3d-elements

Transition metals are complexing substances, that is why being incorporated into the sensor modifiers, they can improve detection discrimination. The method of piezoelectric microweighting was used to study the sorption characteristics of the films based on partially soluble phosphates of 3d-elements (manganese (II), iron (II and III), nickel, copper, zinc, chromium) and coatings bearing partially soluble ferrous salts (hydrated oxide, fluoride, carbonate, sulfide, phosphate). The salts were created immediately prior to analysis, with bee glue as a filming agent. The method of immersion sensors in suspension of the filming agent and partially soluble salt, that was kept homogeneous by ultrasonic bath, was recognized the best way of film formation. Sorption characteristics of the composed coatings of piezoelectric resonator were estimated by the area under sorption kinetic curve and by peak value of sensor oscillation frequency drop during analysis of equilibrium gaseous form received over pure substances (water, phenol, isopropanol, isobutanol, acetous acid, chloroform, benzene, toluene, acetone, ethyl acetate, ammonia, diethyl amine, triethylamine, tert-butylamine, benzylamine). It was possible to determine the identifying variables Aij, minimax values of those allow to detect individual substances in the mixed vapour. Modifier application of piezoelectric resonators of phosphates of different 3d-elements is more efficient than use of different salts of one element. The shortcoming of the proposed modifiers is temporarily stable amine (ammonia) complexation. Those analytes desorption from the films proceeds slowly, it is determined by the bond strength of complexes and takes from 2 to 6 hours. However, array of seven sensors, modified by phosphates of transition metals of group IV, allows to detect oxygen- and nitrogen-based compounds vapours in the mixed vapour as well as to detect ammonia, diethyl amine and triethylamine individually.)

Characterization of the micro-contaminants from the inner-body of Kraak porcelain excavated from the \u201cNan\u2019ao I\u201d shipwreck, the South China Sea

In this paper, optical microscopy, SEM–EDS, Raman and FT-IR analyses were used to investigate different types of corrosion product between layers of glaze and body of Kraak porcelain objects that were excavated from “Nan’ao I” shipwreck, the South China Sea. Several contaminants including NaCl, CaSO4·2H2O, FeOOH and FeS2, were found in many of the pores and cracks of the porcelain objects from Jingdezhen Kiln and Zhangzhou Kiln, even after conservation. While compared with the sample of Jingdezhen Kiln, the contaminants in the sample of Zhangzhou Kilns much more severely. The research pointed out that these contaminants were formed due to the marine environment influence and cross-contamination with other metal relics located in the shipwreck, and more contaminants formed in porous structure, hence reduce the porcelain quality. As regards to conservation, the fragility of ceramic objects from underwater contexts are likely to be caused by various kinds of insoluble ferrous salts and its phase transition pressure. Previous studies on this kind of remains tend to focus on the macro-insoluble salts on the enamel surface. In this paper, preliminary investigations were performed for the first time on different kinds of inner micro-corrosion product in China.

Effect of Initial Salt Composition on Physicochemical and Structural Characteristics of Zero-Valent Iron Nanopowders Obtained by Borohydride Reduction

The effect of initial salt composition on characteristics of zero-valent iron nanopowders produced via borohydride reduction was studied. The samples were characterized by X-ray diffraction, scanning and transmission electron microscopy, and low-temperature nitrogen adsorption. The efficiency of Pb2+ ions removal from aqueous media was evaluated. The use of ferric salts led to enhanced reduction kinetics and, consequently, to a smaller size of iron particles in comparison with ferrous salts. A decrease in the ionic strength of the synthesis solutions resulted in a decrease in iron particles. The formation of small highly-reactive iron particles during synthesis led to their oxidation during washing and drying steps with the formation of a ferrihydrite phase. The lead ions removal efficiency was improved by simultaneous action of zero-valent iron and ferrihydrite phases of the sample produced from iron sulphate.

Novel Brønsted‐Lewis Acid Heterogeneous Catalyst: Functionalized Imidazolium Ferric Salts@SBA‐15 for Efficient Production of Biodiesel

AbstractBrønsted‐Lewis acid heterogeneous catalyst functionalized imidazolium ferric salts@SBA‐15 ([DSIM][FeCl4]/SBA‐15) with large specific surface and mesoporous structure was designed and prepared to catalyze the esterification of oleic acid with methanol for yielding biodiesel (fatty acid methyl ester). The as‐prepared catalyst showed good catalytic performance with 98.2% conversion of oleic acid under the optimal reaction conditions: the molar ratio of methanol and oleic acid was 10:1 and the amount of catalyst was 5% of oleic acid mass, 4 h and 70 °C. The samples were characterized by X‐ray diffraction, FT‐IR, N2 adsorption‐desorption, Pyridine‐adsorbed FT‐IR, Thermogravimetric analysis, Energy dispersive X‐ray spectroscopy, scanning electronic microscopy (SEM) and transmission electron microscopy (TEM). The results demonstrated that imidazolium ferric salt was successfully loaded onto the surface of SBA‐15 and the catalyst retained the mesoporous structure of the support. The catalyst [DSIM][FeCl4]/SBA‐15 still performed over 85.5% of conversion after 5 reaction cycles, which indicated its good stability and reusability.

Evaluation of rheological parameters of dough with ferrous lactate and ferrous gluconate

The aim of this study was to analyse the effect ferrous gluconate and ferrous lactate on the rheological be- haviour of dough from a high extraction rate. For fortification of wheat flour, we used iron ions in a divalent form in amounts of 3, 4, and 5 mg/100 g. To record the rheological characteriscics of the fortified wheat flour dough, Farino- graph, Amilograph, Falling Number, Rheofermentometer, and Thermo Haake Mars dynamic rheometer were applied. The Farinograph did not show significant changes in the water absortion values in the samples with ferrous salts. As for dough development time and dough stability, small amounts of ferrous additives increased and large amounts de- creased those parameters. The effect was more significant in the samples with ions from gluconate form than from lactate salt. The Amylograph recorded an increased peak viscosity with an increasing ferrous salt quantity. That was the case for both ferrous salt forms. The increased was in a similar way for both types of ferrous salt forms used. The total CO volume production and the retention coefficient obtained with the help of the Rheofermentometer device increased in the dough samples with 3 and 4 mg of iron/100 g. However, the addition of 5 mg of iron decreased those indicarors. The decrease was more significant for iron ions from ferrous ferrous gluconate than from ferrous lactate. The fundamental rheological properties of the dough were analysed by using a frequency sweep and oscillatory tem- perature sweep test. Ferrous lactate and ferrous gluconate influenced both the fundamental and empirical rheological properrties og the dough in similar way.

Coagulation of Iodide-Containing Resorcinol Solution or Natural Waters with Ferric Chloride Can Produce Iodinated Coagulation Byproducts.

Iodinated disinfection byproducts (I-DBPs) are of particular concern in drinking water due to the more cytotoxic and genotoxic properties than their chlorinated and brominated analogs. Formation of I-DBP primarily results from the oxidation of iodide-containing waters with various oxidants and the chlor(am)ination of iodinated organic compounds in drinking water. This study first reports that ferric chloride (FeCl3) can lead to the formation of iodinated coagulation byproducts (I-CBPs) from iodide-containing resorcinol solution or natural waters. The unwanted I-CBP formation involved the oxidation of iodide by ferric ions to generate various reactive iodine species, which further oxidize organic compounds. Although the oxidation rate of iodide by FeCl3 was several orders of magnitude slower than that by chlorine or chloramine, most of the converted iodide under the ferric/iodide system was transformed into iodine and iodinated organic compounds rather than iodate. Formation of four aliphatic I-CBPs was observed, and four aromatic I-CBPs were identified by gas chromatography mass-spectrometry and theoretical calculation. Coagulation of iodide-containing waters with FeCl3 also produced I-CBPs ranging from 12.5 ± 0.8 to 32.5 ± 0.2 μg/L as I. These findings call for careful consideration of the formation of I-CBPs from coagulation of iodide-containing waters with ferric salts.

Preparation and regeneration of iron-modified nanofibres for low-concentration phosphorus-containing wastewater treatment.

In this study, nanocellulose (CNFs) was prepared by a mechanical shearing method, a simple and pollution-free process. Iron hydroxide was loaded on nanocellulose, a natural macromolecule derived from bamboo, to produce the second-generation iron-loaded nanocellulose for the removal of low-concentration phosphorus from wastewater. We found that the best modified ferric salt was ferric chloride. When the mass ratio of Fe(OH)3 and CNFs was 1.5 : 1, freeze-drying with liquid nitrogen yielded the best adsorption performance. The adsorption process of Fe(OH)3@CNFs followed the pseudo-second-order kinetics and belonged to chemical adsorption. Regeneration experiments showed that after 10 cycles of adsorption–regenerations of the adsorbent, the phosphorus adsorption efficiency was still stable at 80% of the initial material. The prepared adsorbent was characterized by the BET surface area measurement, scanning electron microscopy and FT-IR. The surface morphology, pore size and elements of materials before and after iron loading were analysed. Compared with other adsorbents, the phosphorus removal performances of the second-generation iron-loaded nanocellulose were superior. Compared with the first-generation material, the second-generation adsorbent is simpler and more environmentally friendly.

Paramagnetic Fluorinated Nanoemulsions for in vivo F-19 MRI.

We aim to develop perfluorocarbon-based nanoemulsions with improved sensitivity for detection of inflammatory macrophages in situ using F-19 MRI. Towards this goal, we evaluate the feasibility of nanoemulsion formulation incorporating a metal chelate in the fluorous phase which shortens the F-19 longitudinal relaxation rate and image acquisition time. Perfluorinated linear polymers were conjugated to metal-binding tris-diketonate, blended with unconjugated polymers, and emulsified in water. Phospholipid-based surfactant was used to stabilize nanoemulsion and provide biocompatibility. Nanoemulsions were metalated with the addition of ferric salt to the buffer. Physical stability of surfactant and nanoemulsion was evaluated by mass spectrometry and dynamic light scattering measurements. Nanoemulsions were injected intravenously into a murine granuloma inflammation model, and in vivo19F/1H MRI at 11.7T was performed. We demonstrated stability and biocompatibility of lipid-based paramagnetic nanoemulsions. We investigated potential oxidation of lipid in the presence of metal chelate. As a proof of concept, we performed non-invasive monitoring of macrophage burden in a murine inflammation model following intravenous injection of nanoemulsion using in vivo F-19 MRI. Lipid-based nanoemulsion probes of perfluorocarbon synthesized with iron-binding fluorinated β-diketones can be formulated for intravenous delivery and inflammation detection in vivo.