UV–vis spectroscopic detection of formaldehyde and its analogs: A convenient and sensitive methodology

Yuan, Chenyao; Pu, Jianchen; Fu, Donglei; Min, Yuru; Wang, Lei; Liu, Jingquan

doi:10.1016/j.jhazmat.2022.129457

Cited by 18 publications

(3 citation statements)

References 37 publications

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“…Simultaneously, the UV–vis spectrophotometer was employed to determine BTZ concentrations in other processes without the disturbance of colored byproducts . 258 nm wavelength was selected based on the absorption spectrum shown in Figure S1.…”

Section: Methodsmentioning

confidence: 99%

“…Simultaneously, the UV−vis spectrophotometer was employed to determine BTZ concentrations in other processes without the disturbance of colored byproducts. 28 258 nm wavelength was selected based on the absorption spectrum shown in Figure S1. Furthermore, the linear relationship between BTZ concentration and absorbance at 258 nm was determined, as shown in Figure S2.…”

Section: Chemicalsmentioning

confidence: 99%

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Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Jiang

Zhou²,

Zhou

et al. 2022

Ind. Eng. Chem. Res.

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This work reports an efficient treatment for wastewater containing a high benzotriazole (BTZ) concentration. The treatment uses the combinational UV/H2O2/O3 system under basic condition. The traditional UV/H2O2 operation was proven to be ineffective in the treatment of such sewage, due to the generation of the color intermediates. The degradation of BTZ can be promoted by introducing O3 to the UV/H2O2 system, indicated by the higher synergistic coefficient (S = 2.73). The quenching experiments confirmed that the ·OH species played the key role in the UV/H2O2/O3 system. The reaction parameters including the H2O2 dosage, O3 concentration, initial pH, and inorganic anions were found to influence the degradation. Further, the optimal conditions were determined: H2O2 dosage of 0.09 mol/L, O3 concentration of 10.5 mg/min, and initial pH of 11.0. BTZ can be removed completely with a COD reduction of 98.60% after 270 min of treating under the best process. Using the Fukui function calculation and LC–MS measurements, the BTZ degradation mechanisms were proposed. Predictions using the TEST software showed that the biotoxicity of BTZ containing wastewater decreased after treatment. The operational cost calculated for the best conditions is 0.1813 USD/L.

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Section: Methodsmentioning

confidence: 99%

Section: Chemicalsmentioning

confidence: 99%

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Jiang

Zhou²,

Zhou

et al. 2022

Ind. Eng. Chem. Res.

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“…The feedback, adjustment and control of mass concentration balance in the process industry based on real-time monitoring technology are the key to addressing the low resource utilization rate and pollution of the process industry [ 4 , 5 ]. The existing national standard methods for substance detection have been widely used in the fields of environmental treatment [ 6 , 7 ], water quality detection [ 8 , 9 , 10 ], the biopharmaceutical industry [ 11 , 12 ] and the food industry [ 13 , 14 ]. However, these national standard methods still require complex pretreatment processes (filtration, digestion [ 15 ], extraction [ 16 ], oxidation/reduction, complexing/coloring [ 17 ], etc.)…”

Section: Introductionmentioning

confidence: 99%

Comparative Investigation of the Spectroscopic Behavior Based on High-Concentrated Solution in Nitrogen and Air Atmospheres

Zhang

Duan

Jiang

et al. 2023

IJMS

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In order to accurately obtain photometric information of high concentration SO42− and other substances in the process industry, the spectroscopy behavior of SO42−, S2−, Ni2+ and Cu2+ in air and nitrogen atmosphere was compared based on the UV-visible spectrophotometer with a nitrogen replacing the oxygen. Different from Ni2+ and Cu2+, the accuracy of SO42− and S2− in the ultraviolet region was effectively improved by using a nitrogen atmosphere (P detection results were regressed within the limited standard range, RE < 5%). The nitrogen atmosphere suppressed the additional light attenuation caused by its absorption of ultraviolet rays by isolating oxygen and was also reflected in the decrease in the degree of red shift of the characteristic wavelength for SO42− with increasing concentration. Therefore, the detection results of SO42− showed an effective improvement in sensitivity. Nevertheless, according to the complementary experimental results and theoretical calculations, in addition to oxygen absorption, the low detection accuracy of SO42− high concentration is also attributed to the reduction of the energy required for electronic excitation per unit group caused by the interaction between SO42− groups, resulting in a deviation of the C-A curve from linearity at high concentrations. The influence of this intermolecular force on the detection results is far more important than oxygen absorption. The research can provide reliable theoretical guidance and technical support for the pollution-free direct measurement of high-concentration solutions in the process industry and promote the sustainable development of the process industry.

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Pulsed Airstream‐Driven Hierarchical Micro‐Nano Pore Structured Triboelectric Nanogenerator for Wireless Self‐Powered Formaldehyde Sensing

Wang,

Ren,

Zheng

et al. 2024

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Formaldehyde (HCHO), as a common volatile organic compound, has a serious impact on human health in the daily lives and industrial production scenarios. Given the security issue of HCHO detection and danger warning, a ZIF‐8/copper foam based pulsed airstream‐driven triboelectric nanogenerator (ZCP‐TENG) is designed to develop the self‐powered HCHO sensors. By combining contact electrification and electrostatic induction, the ZCP‐TENG can be utilized for airflow energy harvesting and HCHO concentration detection. The short‐circuit current and output power of the ZCP‐TENG can reach 2.0 µA and 81 µW (20 ppm). With the high surface area, abundant micro‐nano pores, and excellent permeation flux, the ZCP‐TENGs exhibit excellent HCHO sensing response (61.3% at 100 ppm), low detection limit (≈2 ppm), and rapid response/recovery time (14/15 s), which can be served as a highly sensitive and selective HCHO sensor. By connecting an intelligent wireless alarm, the ZCP‐TENGs are designed to construct a self‐powered warning system to monitor and remind the HCHO of exceedance situations. Moreover, by combining a support vector machine model, the difference concentrations can be quickly identified with an average prediction accuracy of 100%. This study illustrates that ZCP‐TENGs have broad application prospects and provide guidance for HCHO monitoring and danger warnings.

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UV–vis spectroscopic detection of formaldehyde and its analogs: A convenient and sensitive methodology

Cited by 18 publications

References 37 publications

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Comparative Investigation of the Spectroscopic Behavior Based on High-Concentrated Solution in Nitrogen and Air Atmospheres

Pulsed Airstream‐Driven Hierarchical Micro‐Nano Pore Structured Triboelectric Nanogenerator for Wireless Self‐Powered Formaldehyde Sensing

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UV–vis spectroscopic detection of formaldehyde and its analogs: A convenient and sensitive methodology

Cited by 18 publications

References 37 publications

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H2O2/O3 Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H2O2/O3 Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Comparative Investigation of the Spectroscopic Behavior Based on High-Concentrated Solution in Nitrogen and Air Atmospheres

Pulsed Airstream‐Driven Hierarchical Micro‐Nano Pore Structured Triboelectric Nanogenerator for Wireless Self‐Powered Formaldehyde Sensing

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Product

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Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis

Efficient Degradation of High-Concentration Benzotriazole Wastewater via UV/H₂O₂/O₃ Operation: Degradation Mechanism, Toxicological Evaluation, and Economic Analysis