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Xianjun Wang,Junzhen Di,Bing Liang,Yu Yang,Yanrong Dong,Mingxin Wang 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.5
In view of the serious pollution and high cost of treatment of acid mine drainage (AMD) in coal mine, the polyving akohol (PVA) and boric acid embedding cross-linking method was used to prepare the immobilized particles for treatment of AMD with sulfate-reducing bacteria (SRB) and nano zero-valent iron (nano-Fe⁰) as the main body. In order to explore the specification and dosage of each matrix component of immobilized particle, a series of single factor tests and orthogonal tests were carried out to determine the optimal ratio of each matrix component. The results shows that when the SRB quality additive percentage was 30%, the nano-Fe0 dosage was 4%, the corn cob particle size was 60 mesh and the dosage was 3%, the SO₄<SUP>2-</SUP>, Cr<SUP>6+</SUP> and Cr<SUP>3+</SUP> removal rates were 82.99%, 99.78% and 38.78%, respectively, the TFe and COD release rates were 4.26 ㎎·L<SUP>-1</SUP> and 1,033.4 ㎎·L<SUP>-1</SUP>, respectively, and the pH value was 8.04, and the treatment effect was the best.
Wenping Peng,Nan Wang,Shunmin Wang,Junzhen Wang,Zixiu Bian 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.1
The phenolic substances, antioxidant capacity, and enzyme inhibitory activity of germinated Fagopyrum tataricum (Tartary buckwheat) under different microwave and L-phenylalanine (L-Phe) were investigated for the potential of enriching polyphenols. With the germination of seeds, the contents of total phenolics and total flavonoids increased, the antioxidant capacity and enzyme inhibitory activity were enhanced. The highest contents of total phenolics and total flavonoids in Tartary buckwheat sprouts were 17.41 mg GAE/g and 6.26 g RE/100 g DW (7 days), respectively. Correlation analysis and principal component analysis indicated that T3 (microwave 250 W, 90 s; L-Phe 2.9 mmol/L) could effectively improve the content of polyphenols, enzyme inhibition activity and antioxidant capacity of Tartary buckwheat sprouts obviously. This study hopes to provide some new ideas for enriching phenolics and improving antioxidation of Tartary buckwheat sprouts.
Sihang Bao,Junzhen Di,Jianguo Yang,Donglin Wang,Juan Sun,Yanrong Dong 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.3
In view of the high content of Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> in acid mine drainage (AMD), the adsorption properties of lignite for Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> were studied. The adsorption performance of lignite for Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> was revealed by combining with FT-IR, XPS and EDS. The results showed that the adsorption kinetic model of lignite for Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> conformed to the quasi-first-order kinetic model. The isothermal adsorption line fitting models of lignite for Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> were in accordance with the Langmuir model and the Freundlich model, respectively. The maximum equilibrium adsorption capacities of lignite for Cu and Zn were 67.84 mg/g and 55.5 mg/g. The adsorption process of Cu<SUP>2+</SUP> and Zn<SUP>2+</SUP> by lignite involved electrostatic, coordination and ion exchange. Under the condition of coexistence of two kinds of ion, the adsorption site of lignite had stronger binding ability to copper ions.