Hydrothermal Growth and Orientation of LaFeO Epitaxial Films.

LaFeO thin films were successfully epitaxially grown on single-crystalline SrTiO substrates by the one-step hydrothermal method at a temperature of 320 °C in a 10 mol/L KOH aqueous solution using La(NO) and Fe(NO) as the raw materials. The growth of the films was consistent with the island growth mode. Scanning electronic microscopy, elemental mapping, and atomic force microscopy demonstrate that the LaFeO thin films cover the SrTiO substrate thoroughly.

Chlorine-mediated electrochemical advanced oxidation process for ammonia removal: Mechanisms, characteristics and expectation.

Chlorine-Mediated Electrochemical Advanced Oxidation (Cl-EAO) technology is a promising approach for ammonia removal from wastewater due to its numerous advantages, including small infrastructure, short processing time, easy operation, high security, and high nitrogen selectivity. This paper provides a review of the ammonia oxidation mechanisms, characteristics, and anticipated applications of Cl-EAO technology. The mechanisms of ammonia oxidation encompass breakpoint chlorination and chlorine radical oxidation, although the contributions of active chlorine, Cl, and ClO remain uncertain.

Advanced phosphate and nitrogen removal in water by La-Mg composite.

A novel La-Mg composite was prepared for the removal of low concentration phosphate and ammonium nitrogen to alleviate the eutrophication problem. The composition and morphology of La-Mg composite was characterized; Its surface was composed of La, Mg, C, and O elements, with a specific surface area of 21.92 m/g.

Ce-based catalysts used in advanced oxidation processes for organic wastewater treatment: A review.

Refractory organic pollutants in water threaten human health and environmental safety, and advanced oxidation processes (AOPs) are effective for the degradation of these pollutants. Catalysts play vital role in AOPs, and Ce-based catalysts have exhibited excellent performance. Recently, the development and application of Ce-based catalysts in various AOPs have been reported.

Synthesis of Spinel Ferrite MFeO (M = Co, Cu, Mn, and Zn) for Persulfate Activation to Remove Aqueous Organics: Effects of M-Site Metal and Synthetic Method.

Metal species and synthetic method determine the characteristics of spinel ferrite MFeO. Herein, a series of MFeO (M = Co, Cu, Mn, Zn) were synthesized to investigate the effect of M-site metal on persulfate activation for the removal of organics from aqueous solution. Results showed that M-site metal of MFeO significantly influenced the catalytic persulfate oxidation of organics.

Direct 3-D printing of Ti-6Al-4V/HA composite porous scaffolds for customized mechanical properties and biological functions.

Customized scaffold plays an important role in bone tissue regeneration. Precise control of the mechanical properties and biological functions of scaffolds still remains a challenge. In this study, metal and ceramic biomaterials are composited by direct 3-D printing.

MnCeO with high efficiency and stability for activating persulfate to degrade AO7 and ofloxacin.

An efficient MnCeO composite was successfully synthesized for activation of persulfate to degrade acid orange 7 (AO7) and ofloxacin. Pollutants degradation efficiencies with different catalytic systems were investigated. Results showed the performance of MnCeO was better than MnO CeO and MnO + CeO.

MnCeO/diatomite catalyst for persulfate activation to degrade organic pollutants.

Persulfate (PS)-based oxidation technologies are attracting increasing attentions in water treatment due to their high efficiency and stability. In this study, a novel diatomite supported MnCeO composite (MnCeO/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants. Results indicated that diatomite not only dispersed MnCeO and increased the specific surface area of catalyst, but also improved the low-valence metal site (Mn and Ce) and reactive oxygen species site (-OH) of MnCeO, thus enhancing the activities of MnCeO.

A High-Efficiency CuO/CeO Catalyst for Diclofenac Degradation in Fenton-Like System.

An efficient Fenton-like catalyst CuO/CeO was synthesized using ultrasonic impregnation and used to remove diclofenac from water. The catalyst was characterized by N adsorption-desorption, SEM-EDS, XRD, HRTEM, Raman, and XPS analyses. Results showed that CuO/CeO possessed large surface area, high porosity, and fine elements dispersion.

An efficient CuO-γFe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism.

CuO-γFeO was fabricated as a novel and effective persulfate (PS) catalyst to remove bio-refractory organic pollutants. Characterization results showed that CuO-γFeO possessed a relatively large surface area among transition metal oxides which provided favorable adsorption and activation sites for PS to degrade pollutants. There was an obvious synergy between CuO and γFeO in the composite, which played 84.

FeNiCeO ternary catalyst prepared by ultrasonic impregnation method for diclofenac removal in Fenton-like system.

FeNiCeO was firstly prepared by ultrasonic impregnation method and used to remove diclofenac in a Fenton-like system. The catalytic activity was improved successfully by doping Ni into FeCeO. The diclofenac removal efficiency reached 97.

Heterogeneous activation of persulfate by CoO-CeO catalyst for diclofenac removal.

A series of CoO-CeO mixed metal oxides were synthesized by co-precipitation method and successfully used to activate persulfate for diclofenac removal. The effects of Co:Ce mole ratio, calcination temperature and calcination time on the catalytic activities were investigated. Results showed that the activity of CoO-CeO catalysts increased with Co:Ce mole ratio from 1:9 to 7:3, and decreased with the calcination temperature from 300 to 800 °C.

Iron Based Catalysts Used in Water Treatment Assisted by Ultrasound: A Mini Review.

The characteristics and performances of catalyst are the key in catalytic ultrasonic treatment of wastewater, and iron based catalysts are known for low cost, high accessibility and safety. This paper reviewed the current research status of iron-based catalysts in water treatment assisted by ultrasound. Zero valent iron, FeO and iron composited with other metals were analyzed, their behaviors in catalytic sonochemistry were summarized, and the potential catalytic mechanisms were discussed in details.

The roles of loosely-bound and tightly-bound extracellular polymer substances in enhanced biological phosphorus removal.

Extracellular polymeric substances (EPS) have be founded to participate in the process of enhanced biological phosphorus removal (EBPR), but the exact role of EPS in EBPR process is unclear. In this work, the roles of loosely-bound EPS (LB-EPS), tightly-bound EPS (TB-EPS) and microbial cell in EBPR were explored, taking the activated sludge from 4 lab-scale A/O-SBR reactors with different temperatures and organic substrates as objects. It was founded that the P of EBPR activated sludge was mainly stored in TB-EPS, but the P of non-EBPR activated sludge was primarily located in microbial cell.