Low consumption and portable technology for dithionite detection based on potassium ferricyanide differential spectrophotometry method in related advanced oxidation processes

Song，Wei1; Li，Ji2; Fu，Caixia3; Wang，Zhuoyue2; Wang，Zhihong1; Wang，Qiao1; Zhang，Xiaolei2; Zhou，Yuxin2; Du，Xing1

2021

10.1016/j.envres.2021.112430

ENVIRONMENTAL RESEARCH   影响因子和分区

0013-9351

1096-0953

Carbon neutrality has been received more attention and emerged in wastewater treatment processes. Due to the development of treating technologies with the rising of new-emerging pollutants, the coupled chemical processes also should remain current for the goal of carbon-neutral operation. Among of those updated strategies, several advanced oxidation processes (AOPs) based on dithionite (DTN, SO), a common water treatment agent, have been established for refractory organic contaminations removal. However, in terms of DTN detection, the traditional formol-titration method has several application limits including the low detection sensitivity and high consumption of formaldehyde. In this study, compared with traditional method, a low energy consumption technology has been developed based on the potassium ferricyanide with the carbon consumption decreasing by about 5 times. Moreover, detection limit of DTN (mmol/L level) also was lower than the titration method. The method was established based on the fact that every 1 mol of DTN can react with 2 mol [Fe(CN)] under alkaline condition. According to that potassium ferricyanide (K [Fe(CN)]) has the maximum absorption at 419 nm wavelength, a fitting equation based on the linear relationship between the absorbance variation of K [Fe(CN)] and DTN amount in the ranges of 0–30 μmol with the detection limit of 0.6 μmol was established with the determination coefficient of 0.99935. It was found that there was no obvious influence of the ubiquitous foreign species with the amount lower than 6 mM, 4 mM, 6 mM, 4 mM and 1 mg/L for Cl, HCO, NO, SO and NOM, respectively. Moreover, methanol and tert-butanol were employed to verify the influence of the presence of organic matters on the determination of DTN and no impact was observed in this study. The proposed method provides a new way for DTN detection with stable and countable performance in the related AOPs with the low electric energy and carbon source consumption and high detection efficiency.

Absorbance variation Dithionite Low consumption detection technology Potassium ferricyanide Spectrophotometric method

英语

其他

ENVIRONMENT/ECOLOGY

2-s2.0-85120405365

Scopus

1.School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,510006,China
2.School of Civil and Environmental Engineering,Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control,Harbin Institute of Technology (Shenzhen),Shenzhen,518055,China
3.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Song，Wei,Li，Ji,Fu，Caixia,et al. Low consumption and portable technology for dithionite detection based on potassium ferricyanide differential spectrophotometry method in related advanced oxidation processes[J]. ENVIRONMENTAL RESEARCH,2021,205.

Song，Wei.,Li，Ji.,Fu，Caixia.,Wang，Zhuoyue.,Wang，Zhihong.,...&Du，Xing.(2021).Low consumption and portable technology for dithionite detection based on potassium ferricyanide differential spectrophotometry method in related advanced oxidation processes.ENVIRONMENTAL RESEARCH,205.

Song，Wei,et al."Low consumption and portable technology for dithionite detection based on potassium ferricyanide differential spectrophotometry method in related advanced oxidation processes".ENVIRONMENTAL RESEARCH 205(2021).