Conductive MOF nanowires with metal catechol structures are synthesized on compressed nickel foam and directly used in sodium ion capacitors for the first time.
A homogenous MoO2 and carbon mixed coating on an Fe3O4 anode with a core–shell structure boosts the cycling stability and capacity of an iron oxide anode.
The removal of high concentration ammonia in wastewater was investigated by an indirect electrochemical oxidation method using titanium electrodes coated with ruthenium and iridium (RuO2-IrO2-TiO2/Ti). The effect of different initial pH on ammonia removal by electrochemical oxidation was studied. The concentrations variation of ammonia, total nitrogen, nitrate nitrite, and free cholorines, chloramines was analyzed under the conditions with and without pH controlling. The results indicate that ammonia removal efficiency was higher under the moderate alkaline condition than that under neutral one. During the electrolysis process, nitrate and nitrite concentrations were very low, even below their detecting limits. The concentrations of free chlorines and chloramines were significantly affected by pH, as trichloramine and free chlorines were mainly produced in the reaction without pH controlling, while monochloramine was mainly produced in a stable alkalescene.
A method for the detection of PAEs (16 kinds ) in the childrens products using ultrasonic extraction and gas chromatography were investigated in this study. The method was linear between 0.500 and 10.000 μg ml-1, R2 between 0.995 and 0.999, LOQ between 0.704 and 1.585 μg ml-1. The method repeatability was between 1.2% and 13% RSD. The experiment results showed that the children's products samples containing different kinds of PAEs. DIBP and DCHP were frequency found in all sample. The PAEs concentration of the childrens products sample was between 0.019 and 6.301 μg ml-1.
A pilot study was carried out to evaluate the incorporation of air sparging for enhancing ultrafiltration membrane filterability in treating soybean whey. The results showed that the decline of membrane permeate flux was slowed down by air sparging. The filtration could continue for 1200 minutes with acceptable permeate flux under the optimal parameters as temperature of 45°C, pH of 7.0, transmembrane pressure (TMP) of 0.05MPa and air sparging intensity of 5.0m3/h. The experiment also revealed that air sparging was advantageous to hydrodynamic flushing and chemical cleaning to reclaim membrane permeate flux. Moreover, the effect of air sparging on the retaining ratios of protein and sugar was investigated.
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