Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes

Molecules, Год журнала: 2024, Номер 29(5), С. 952 - 952

Опубликована: Фев. 21, 2024

Developing a green, low-carbon, and circular economic system is the key to achieving carbon neutrality. This study investigated organics removal efficiency in three-dimensional electrode reactor (3DER) constructed from repurposed industrial solid waste, i.e., Mn-loaded steel slag, as catalytic particle electrodes (CPE). The CPE, micron-grade material consisting primarily of transition metals, including Fe Mn, exhibited excellent electric conductivity, ability, recyclability. High rhodamine B (RhB) 3DER was observed through physical modelling experiment. optimal operating condition determined single-factor experiment which 5.0 g·L−1 CPE 3 mM peroxymonosulfate (PMS) were added 200 mL solution 10 RhB under current intensity 0.5 A 1.5 2.0 cm distance between 2D electrodes. When initial pH value simulated 9, rate exceeded 96% after 20 min reaction. In addition, main reactive oxidation species determined. results illustrated that HO• SO4•− both existed, but contribution much lower than 3DER. summary, this research provides information on potential for removing refractory water.

Язык: Английский

Peracetic Acid Activation by Natural Magnetite for Bisphenol a Degradation: Performance and Degradation Mechanism

Опубликована: Янв. 1, 2024

Advanced oxidation processes based on activated peracetic acid (PAA) have been widely used in water treatment. In this study, magnetite was first employed PAA activation for Bisphenol A (BPA) degradation. The results showed that the magnetic/PAA system degraded 94.6% BPA 60 min at neutral pH (pH=6.7), exhibiting a higher rate constant (kobs=0.051 min-1) than or alone. X-ray photoelectron spectroscopy (XPS) proved ≡Fe(II) and surface hydroxyl group (OOH) were dominant active sites, which promoted electron transfer between magnetite, PAA, BPA. According to scavenging experiments paramagnetic resonance (EPR) spectrum, main reactive oxygen species responsible degradation include organic radicals(·CH3COOO), Hydroxyl radical(·OH) singlet (1O2). pathway determined by LC-MS analysis, toxicity of intermediates evaluated ECOSAR wheat seed growth inhibition experiment. addition, magnetite/PAA presented good adaptability under both acidic conditions, demonstrating efficient even presence complex matrices such as Cl−, NO3− humic bodies while HCO3- H2PO4- inhibited This study not only reveals mechanism activating but also provides new idea applying PAA-based AOPs remove micropollutants wastewater.

Язык: Английский

Unveiling intrinsic electrochemical mechanism of supporting electrolyte and interaction mechanism in electrochemical oxidation tetracycline with nano-PbO2

Environmental Science Nano, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This paper studies the intrinsic electrochemical mechanisms of supporting electrolytes and their interaction with nano-PbO 2 during oxidation tetracycline, providing insights into role in enhancing degradation efficiency.

Язык: Английский