Modulating the >Co(II)/Co(III) redox cycling via confinement of cobalt with WS for the ultrafast sulfite activation.

Sulfite autoxidation in combination with the cobalt-based heterogeneous activators, has recently emerged as the efficient sulfate radical (SO) generation process for organic micropollutant abatement in the water and wastewater treatment, yet the sluggish >Co(II)/Co(III) redox cycling currently compromises the efficacy of radical generation and the potential applications. Herein, regarding that the reductive W(IV) species in WS can modulate the >Co(II)/Co(III) redox cycling in the advanced oxidation processes, confinement of cobalt with WS (Co-WS) is designed and characterized. The Co-WS/sulfite process achieves an ultrafast tetracycline (TC) abatement (~100 % abatement of TC within 1 min) under circumneutral conditions with lower dosage of sulfite and activator, outperforming the current cobalt-based heterogeneous counterparts.

Reaction kinetics of CO capture into AMP/PZ/DME solid-liquid biphasic solvent.

The non-aqueous solid-liquid biphasic solvent of 2-amino-2-methyl-1-propanol (AMP)/piperazine (PZ)/dipropylene glycol dimethyl ether (DME) features a high CO absorption loading, favorable phase separation behavior and high regeneration efficiency. Different with the liquid-liquid phase change solvent, the reaction kinetics of CO capture into solid-liquid biphasic solvent was rarely studied. In the present work, the reaction kinetics of CO absorption into AMP/PZ/DME solid-liquid biphasic solvent was investigated into the double stirred kettle reactor.

Alcohol regulated phase change absorbent for efficient carbon dioxide capture: Mechanism and energy consumption.

Phase change absorbents based on amine chemical absorption for CO capture exhibit energy-saving potential, but generally suffer from difficulties in CO regeneration. Alcohol, characterized as a protic reagent with a low dielectric constant, can provide free protons to the rich phase of the absorbent, thereby facilitating CO regeneration. In this investigation, N-aminoethylpiperazine (AEP)/sulfolane/HO was employed as the liquid-liquid phase change absorbent, with alcohol serving as the regulator.

Monoethanolamine enhanced iohexol degradation in the Co(II)/sulfite system: Nonnegligible role of complexation in accelerating cobalt redox cycling.

Generation of sulfate radicals (SO) from sulfite activation has emerged as a promising method for abatement of organic pollutants in the water and wastewater treatment. Co(II) has garnered attention due to its high catalytic activity in the sulfite activation, which is compromised by the slow Co(II)/Co(III) redox cycling. Regarding the regulation of Co(II) electronic structure via the complexation effect, monoethanolamine (MEA), a common chelator, is introduced into the Co(II)/sulfite system.

Complexation and degradation of tetracycline by activation of molecular oxygen with biochar-supported nano-zero-valent copper composite.

Nano-zero-valent copper (nZVC) is a superior molecular oxygen (O) activator for the abatement of organic pollutants due to its high electron utilization rate. However, the activation efficiency of O is compromised by the agglomeration tendency of nZVC particles and the concomitant reduction of the available active sites. To address this problem, the biochar (BC) with porous structure and abundant surface functional groups is utilized to disperse and stabilize nZVC for O activation (simplified as the nZVC/BC/O system) for efficient removal of tetracycline (TC).

Mechanistic insights into the efficient activation of peracetic acid by pyrite for the tetracycline abatement.

Recently, iron-based heterogenous catalysts have received much attention in the activation of peracetic acid (PAA) for generating reactive radicals to degrade organic pollutants, yet the PAA activation efficiency is compromised by the slow transformation from Fe(III) to Fe(II). Herein, considering the electron-donating ability of reducing sulfur species, a novel advanced oxidation process by combining pyrite and PAA (simplified as pyrite/PAA) for the abatement of tetracycline (TC) is proposed in this study. In the pyrite/PAA process, TC can be completely removed within 30 min under neutral conditions by the synergy of homogeneous and heterogenous Fe(II) species.

Activation of peracetic acid with zero-valent iron for tetracycline abatement: The role of Fe(II) complexation with tetracycline.

Peracetic acid (PAA) is an excellent oxidant that can produce multiple carbon-centered radicals (R•C). A novel advanced oxidation process (AOP) that combines PAA and nanoscale zero-valent iron (i.e.

Novel biphasic amino-functionalized ionic liquid solvent for CO capture: kinetics and regeneration heat duty.

Amino-functionalized ionic liquid biphasic solvents present excellent absorption capacity, regeneration ability, and energy consumption savings, which make them a possible candidate for CO capture. The kinetics and regeneration heat duty of the [TETAH][Lys]-ethanol-water system capturing CO were investigated in this work. The mass transfer and kinetic parameters, including the overall reaction rate constant (k), the reaction rate constant (k), and the enhancement factor (E), were assessed at diverse concentrations and temperatures.

Coupling life cycle assessment with scenario analysis for sustainable management of Disperse blue 60.

Sustainable management of dyeing industry is of paramount importance in order to minimize resource consumption and reduce related environmental impacts. Herein, an environmental study is conducted wherein life cycle assessment (LCA) is applied to a two-scenario process for Disperse blue 60 production with short and long processing chains with different (a) material types, (b) consumptions, (c) processes, and (d) functional units with yields of 300 t/a. The most important influenced substances of the two scenarios were sodium cyanide and electricity next.

Dual-Functionalized Ionic Liquid Biphasic Solvent for Carbon Dioxide Capture: High-Efficiency and Energy Saving.

To address the problems of high viscosity and difficult regeneration of the rich phase solution, a dual-functionalized ionic liquid ([DETAH][Tz]) was dissolved into a 1-propanol-water solvent to form a novel biphasic solvent for CO capture. The rich phase kept 96% of the total CO loading (1.713 mol mol) but only 44% of the total volume, and its viscosity was only 2.

Activation of sulfite autoxidation with CuFeO prepared by MOF-templated method for abatement of organic contaminants.

Copper ferrite (denoted as CuFeO), prepared via a complexation reaction to obtain bimetal-organic frameworks (Cu/Fe bi-MOFs), followed by a combustion process to remove the MOF template, is employed as a heterogeneous activator to promote sulfite autoxidation for the removal of organic contaminants. At pH 8.0, more than 80% of the recalcitrant organic contaminant iohexol (10 μM) can be removed within 2 min by the activation of sulfite (500 μM) with CuFeO (0.

Efficient activation of sulfite autoxidation process with copper oxides for iohexol degradation under mild conditions.

Sulfite has been recently emerging as an appealing sulfate radical (SO) precursor for efficient treatment of organic contaminants. Due to the negligible autoxidation of sulfite, activators are often introduced to accelerate sulfite autoxidation and the concomitant generation of SO. Present heterogeneous activators are mostly not very effective under mild conditions (pH 7.

Enhanced Cr(VI) removal from simulated electroplating rinse wastewater by amino-functionalized vermiculite-supported nanoscale zero-valent iron.

A novel amino-functionalized vermiculite (AVT)-supported nanoscale zero-valent iron (AVT-nZVI) was successfully synthesized for Cr(VI) removal from simulated electroplating rinse wastewater. Since the agglomeration and oxidation of nZVI could be weakened and the reaction rate between Cr(VI) and nZVI could be enhanced for the novel AVT-nZVI, an efficient Cr(VI) removal could be achieved. The experimental results showed that 100% of Cr(VI) removal was obtained with AVT-nZVI, whereas only 87.

Highly efficient removal of chromium(VI) by Fe/Ni bimetallic nanoparticles in an ultrasound-assisted system.

Highly active Fe/Ni bimetallic nanocomposites were prepared by using the liquid-phase reduction method, and they were proven to be effective for Cr(VI) removal coupled with US irradiation. The US-assisted Fe/Ni bimetallic system could maintain a good performance for Cr(VI) removal at a wide pH range of 3-9. Based on the characterization of the Fe/Ni nanoparticles before and after reaction, the high efficiency of the mixed system could attribute to the synergistic effects of the catalysis of Ni(0) and US cavitation.

Mechanisms of CO2 Capture into Monoethanolamine Solution with Different CO2 Loading during the Absorption/Desorption Processes.

Though the mechanism of MEA-CO2 system has been widely studied, there is few literature on the detailed mechanism of CO2 capture into MEA solution with different CO2 loading during absorption/desorption processes. To get a clear picture of the process mechanism, (13)C nuclear magnetic resonance (NMR) was used to analyze the reaction intermediates under different CO2 loadings and detailed mechanism on CO2 absorption and desorption in MEA was evaluated in this work. The results demonstrated that the CO2 absorption in MEA started with the formation of carbamate according to the zwitterion mechanism, followed by the hydration of CO2 to form HCO3(-)/CO3(2-), and accompanied by the hydrolysis of carbamate.

Immobilization of carbonic anhydrase on carboxyl-functionalized ferroferric oxide for CO2 capture.

New materials of Fe3O4 magnetic microspheres were functionalized with carboxyl and prepared for carbonic anhydrase (CA) immobilization to capture CO2. The optimum conditions for immobilization, such as carrier dose, enzyme dose, pH, shaking speed, temperature and contact time, were determined. The pH and thermal stability of the free and the immobilized CA were compared.

Reduction of ethylenediaminetetraacetic acid iron(III) by Klebsiella sp. FD-3 immobilized on iron(II, III) oxide poly (styrene-glycidyl methacrylate) magnetic porous microspheres: effects of inorganic compounds and kinetic study of effective diffusion in porous media.

Fe3O4 poly (styrene-glycidyl methacrylate) magnetic porous microspheres (MPPMs) were introduced to immobilize Klebsiella sp. FD-3, an iron-reducing bacterium applied to reduce Fe(III)EDTA. The effects of potential inhibitors (S(2-), SO3(2-), NO3(-), NO2(-) and Fe(II)EDTA-NO) on Fe(III)EDTA reduction were investigated.

Differential proteomic profiling in human spermatozoa that did or did not result in pregnancy via IVF and AID.

Purpose: To identify biochemical markers in men with idiopathic infertility and normal sperm counts.

Experimental Design: We obtained proteomic profiling proteins in human spermatozoa following successful or unsuccessful pregnancy via assisted reproductive technology (ART) using 6-plex tandem mass tag (TMT) isobaric mass spectrometry. Our study design consisted of two groups: 1.

Reduction of Fe(III)EDTA by Klebsiella sp. strain FD-3 in NOx scrubber solutions.

Biological reduction of Fe(III) to Fe(II) is a key step in nitrogen oxides (NOx) removal by the integrated chemical absorption-biological reduction method, which determines the concentration of Fe(II) in the scrubbing liquid. A new Fe(III)EDTA reduction strain, named as FD-3, was isolated from mixed cultures used in the integrated NOx removal process and identified as Klebsiella sp. by 16S rDNA sequence analysis.

Synthesis of Fe3O4 poly(styrene-glycidyl methacrylate) magnetic porous microspheres and application in the immobilization of Klebsiella sp. FD-3 to reduce Fe(III)EDTA in a NO(x) scrubbing solution.

Magnetic poly(styrene-glycidyl methacrylate) porous microspheres (MPPM) with high magnetic contents were prepared by surfactant reverse micelles and emulsion polymerization of monomers, in which the well-dispersed Fe(3)O(4) nanoparticles were modified by polyethylene glycol (PEG) and oleic acid (OA) respectively. The characterizations showed that both of the OA-MPPM and the PEG-MPPM were ferromagnetic, however, the OA-MPPM was used to immobilize the bacteria for more advantages. Therefore, the effects of monomer ratio, surfactant, crosslinker and amount of Fe(3)O(4) on the structure, morphology and magnetic contents of the OA-MPPM were investigated.

Reduction of Fe(III)EDTA(-) in a NO(x) scrubbing solution by magnetic Fe3O4-chitosan microspheres immobilized mixed culture of iron-reducing bacteria.

Magnetic Fe(3)O(4)-chitosan microspheres were prepared by co-precipitating of Fe(2+) and Fe(3+) ions with NaOH in the presence of chitosan. The saturated magnetization of the resulting material was 20.0 emu/g.

Quantitative structure-activity relationship (QSAR) study of toxicity of quaternary ammonium compounds on Chlorella pyrenoidosa and Scenedesmus quadricauda.

The acute toxicity of 13 quaternary ammonium compounds (QACs) to Chlorella pyrenoidosa and Scenedesmus quadricauda was investigated in the present study. Significant inhibition on algae biomass was observed and 96 h EC(50)-value of 13 QACs was tested. Sixteen physicochemical and quantum chemical parameters of the QACs were calculated using the semi-empirical MOPAC AMI method.

[Y-chromosome microdeletions do not affect the outcomes of ICSI for infertile males].

Objective: To compare the outcomes of intracytoplasmic sperm injection (ICSI) for infertile males with Y-chromosome microdeletions and for those with azoospermia or severe oligospermia but without Y-chromosome microdeletions.

Methods: We retrospectively analyzed 56 cycles of ICSI for 48 infertile cases with Y microdeletions (Group A) and 94 cycles for 90 cases with azoospermia or severe oligospermia but without Y-chromosome microdeletions (Group B) during the same period. We compared the two groups in the females' age, duration of infertility, males' age, number of oocytes retrieved, number of ICSI oocytes, fertilization rate, good embryo rate, number of embryos transferred, implantation rate, clinical pregnancy rate, abortion rate, live birth rate and babies' sexes.

[Microbial reduction of Fe(III) (EDTA) in the system of nitric oxide removal by metal chelate absorption].

Reduction of Fe(III) (EDTA) with cultivated microorganisms in the system of nitric oxide removal by metal chelate absorption was investigated. Supplemental glucose stimulates the formation of Fe(II) (EDTA) more than ethanol and methanol as the carbon sources. Ammonium salt was used to be as the nitric source instead of nitrate, which inhibits the reduction of Fe(III) (EDTA) due to the competition between the two electron acceptors.

Identification and characterization of cul-3b, a novel hominine CUL-3 transcript variant.

Aim: To identify genes related to the human testis development by substrate hybridization technique.

Methods: A human testis cDNA microarray was constructed and hybridized with probes prepared from human adult and fetal testes and spermatozoa mRNAs by reverse transcription reactions. The differentially expressed genes were sequenced.