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1. Fouling characterization and aeration performance recovery of fine-pore diffusers operated for 10 years in a full-scale wastewater treatment plant

Author:
Jiang, Lu-Man; Chen, Liuyu; Zhou, Zhen; Sun, Dongqi; Li, Yunhui; Zhang, Ming; Liu, Yuan; Du, Silu; Chen, Guang; Yao, Jie
Source:
Bioresource technology 2020 v.307 pp. 123197
ISSN:
0960-8524
Subject:
sodium hypochlorite,   etc   ; aeration; bacteria; biofilm; diffusers; energy; fouling; hydrochloric acid; oxygen; polymers; wastewater treatment;     Show all 11 Subjects
Abstract:
... Fouling characterization and aeration performance recovery of fine-pore diffusers operated for 10 years in a full-scale wastewater treatment plant were investigated to elucidate fouling mechanisms and develop cleaning strategy. The performance decline of diffusers was observed with dynamic wet pressure increased by 3.2 times and standard oxygen transfer efficiency dropped to 73%, which contributed ...
DOI:
10.1016/j.biortech.2020.123197

2. Comparison of cast films and hydrogels based on chitin nanofibers prepared using TEMPO/NaBr/NaClO and TEMPO/NaClO/NaClO2 systems

Author:
Ye, Wenbo; Hu, Yanlei; Ma, Huazhong; Liu, Liang; Yu, Juan; Fan, Yimin
Source:
Carbohydrate polymers 2020 v.237 pp. 116125
ISSN:
0144-8617
Subject:
sodium hypochlorite,   etc   ; chitin; hydrogels; mechanical properties; moieties; nanofibers; oxidants; oxidation; pH; sodium bromide;     Show all 10 Subjects
Abstract:
... Neutral TEMPO/NaClO/NaClO₂ (TNN) oxidation, with NaClO₂ as the primary oxidant under aqueous conditions at pH 6.8 was applied to selectively oxidize surface C6 primary hydroxyl groups of α-chitin to carboxylate groups. When 0.1 mmol TEMPO, 1 mmol NaClO and 20 mmol NaClO₂ were added to 1 g α-chitin, the yield of water-insoluble oxidized chitin was 91.93 %, and the carboxylate content was 0.695 mmol ...
DOI:
10.1016/j.carbpol.2020.116125

3. Preparation of 1,4-linked α-D-glucuronans from starch with 4-acetamide-TEMPO/NaClO2/NaClO system

Author:
Hao, Jie; Wu, Fangxia; Tang, Rong; Sun, Yuanyuan; Liu, Dehua; Zhang, Zhenqing
Source:
International journal of biological macromolecules 2020 v.151 pp. 740-746
ISSN:
0141-8130
Subject:
sodium hypochlorite,   etc   ; moieties; nuclear magnetic resonance spectroscopy; oligosaccharides; oxidants; oxidation; starch; temperature;     Show all 8 Subjects
Abstract:
... Oxidized starch (oxStarch) is a major derivative of starch. In present study, 4-acetamide-TEMPO system was firstly applied to prepare specifically oxidized starch, homogeneous 1,4-linked α-D-glucuronan. The impact of oxidant amount, 4-acetamide-TEMPO amount and reaction temperature on the properties of products were investigated. The product structures were characterized with ¹H NMR for degree of ...
DOI:
10.1016/j.ijbiomac.2020.02.211

4. Efficient Pd-catalyzed oxidative homocoupling of arylboronic acids in aqueous NaClO

Author:
Li, Min-Xin; Tang, Yan-Ling; Gao, Hui; Mao, Ze-Wei
Source:
Tetrahedron letters 2020 v.61 no.17 pp. 151784
ISSN:
0040-4039
Subject:
sodium hypochlorite,   etc   ; acids; aromatic compounds; boronic acids; catalytic activity; chemical reactions; chemical structure; heterocyclic compounds; palladium;     Show all 9 Subjects
Abstract:
... An efficient, mild and practical method was developed for the synthesis of biaryls via the Pd-catalyzed oxidative homocoupling of aromatic/heteroaromatic boronic acids in aqueous NaClO. ...
DOI:
10.1016/j.tetlet.2020.151784

5. Efficacy of citric acid and sodium hypochlorite as disinfectants against Mycoplasma bovis

Author:
Mahdizadeh, Sara; Sawford, Kate; van Andel, Mary; Browning, Glenn F.
Source:
Veterinary microbiology 2020 v.243 pp. 108630
ISSN:
0378-1135
Subject:
sodium hypochlorite,   etc   ; Mycoplasma bovis; bacteria; cattle; citric acid; disinfectants; mastitis; pathogenicity; pathogens; pneumonia;     Show all 10 Subjects
Abstract:
... Mycoplasma bovis, a cattle pathogen of major economic importance across the globe, causes a range of diseases, including pneumonia and mastitis. Because of the limited options for effective treatment of these diseases, prevention and control are preferred to diagnosis and treatment. In this study, the efficacies of citric acid and sodium hypochlorite as disinfectants against M. bovis were tested u ...
DOI:
10.1016/j.vetmic.2020.108630

6. Formation mechanisms of emerging organic contaminants during on-line membrane cleaning with NaOCl in MBR

Author:
Cai, Weiwei; Han, Jiarui; Zhang, Xiangru; Liu, Yu
Source:
Journal of hazardous materials 2020 v.386 pp. 121966
ISSN:
0304-3894
Subject:
sodium hypochlorite,   etc   ; DNA; activated sludge; byproducts; cell walls; chlorine; cleaning; dissolved organic matter; enzymes; permeability;     Show all 10 Subjects
Abstract:
... On-line chemical cleaning with sodium hypochlorite (NaOCl) is widely employed for sustaining MBR permeability, during which the inevitable contact between activated sludge and NaOCl had been shown to trigger substantial release of dissolved organic matter (DOM). Therefore, this work further explored the formation mechanisms of such DOM by looking into the respective reactions of intracellular orga ...
DOI:
10.1016/j.jhazmat.2019.121966

7. Unravelling the effects of the food components ascorbic acid and capsaicin as a novel anti-biofilm agent against Escherichia coli

Author:
Silva, Hevelin Regiane Augusto; de Souza, Gabrielle Messias; Fernandes, José Diego; Constantino, Carlos José Leopoldo; Winkelstroter, Lizziane Kretli
Source:
Journal of food science and technology 2020 v.57 no.3 pp. 1013-1020
ISSN:
0022-1155
Subject:
sodium hypochlorite,   etc   ; DNA; Escherichia coli; ascorbic acid; biofilm; capsaicin; fluorescence microscopy; food composition; physiology; proteins;     Show all 10 Subjects
Abstract:
... This study aimed to evaluate the influence of capsaicin and ascorbic acid on the physiology of biofilm formation and dispersion. The influence of the E. coli ATCC 25922 biofilm and five E. coli isolates were observed in the presence of sodium hypochlorite 2.5 mM and subinhibitory concentrations of capsaicin (7 mM) and ascorbic acid (100 mM). The cells counts were performed through standard plaque ...
DOI:
10.1007/s13197-019-04134-5
PubMed:
32123422
PubMed Central:
PMC7026335

8. Facile and Efficient Two-Step Formation of a Renewable Monomer 2,5-Furandicarboxylic Acid from Carbohydrates over the NiOₓ Catalyst

Author:
Liu, Huai; Li, Weile; Zuo, Miao; Tang, Xing; Zeng, Xianhai; Sun, Yong; Lei, Tingzhou; Fang, Huayu; Li, Tianyuan; Lin, Lu
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.11 pp. 4895-4904
ISSN:
1520-5045
Subject:
sodium hypochlorite,   etc   ; carbohydrates; catalysts; catalytic activity; dicarboxylic acids; hydroxymethylfurfural; oxidants; oxidation; process design; purification methods;     Show all 10 Subjects
Abstract:
... The formation of 2,5-furandicarboxylic acid (FDCA) from carbohydrates without a cumbersome 5-(hydroxymethyl)furfural (HMF) separation/purification process remains a formidable challenge. Herein, we prepared an innovative NiOₓ catalyst for the efficient oxidation of HMF to FDCA by using budget NaClO as oxidant, which can afford high FDCA yields (94–97%) from both pure HMF and carbohydrate-derived c ...
DOI:
10.1021/acs.iecr.0c00142

9. Preparation and characterization of chemically TEMPO-oxidized and mechanically disintegrated sacchachitin nanofibers (SCNF) for enhanced diabetic wound healing

Author:
Chao, Fang-Ching; Wu, Meng-Huang; Chen, Ling-Chun; Lin, Hong-Liang; Liu, Der-Zen; Ho, Hsiu-O; Sheu, Ming-Thau
Source:
Carbohydrate polymers 2020 v.229 pp. 115507
ISSN:
0144-8617
Subject:
sodium hypochlorite,   etc   ; hair follicles; hydrogels; nanofibers; physicochemical properties; sulfonates; sweat glands; tissue repair;     Show all 8 Subjects
Abstract:
... TEMPO-oxidization and mechanical disintegration were utilized to develop sacchachitin nanofibers (SCNF) with a 3D gel structure for being an ideal scaffold. Mechanically disintegrated SCNF (MDSCNF) with NanoLyzer® at 20,000 psi for 5 cycles and TEMPO-oxidized SCNF (TOSCNF) produced with 5.0 and 10.0 mmole NaClO/g SC was designated as SCN5, T050SC, and T100SC, respectively. All 2% MDSCNF suspension ...
DOI:
10.1016/j.carbpol.2019.115507

10. Enhanced electro-generated ferrate using Fe(0)-plated carbon sheet as an anode and its online utilization for removal of cyanide

Author:
Zeng, Feihu; Chen, Cong; Huang, Xianfeng
Source:
Chemosphere 2020 v.241 pp. 125124
ISSN:
0045-6535
Subject:
sodium hypochlorite,   etc   ; additives; anodes; carbon; cyanides; electrochemistry; hydrogen peroxide; iron; oxidants; ozone; potassium permanganate; temperature;     Show all 12 Subjects
Abstract:
... Efficient electrochemical generation of ferrate (Fe(VI)) is still challenged by the passivation of iron materials. Herein, we employed Fe(0)-plated carbon sheet as an anode to enable an efficient production of Fe(VI) with its concentration reached up to 55 mM, which was 8 times higher than that with iron sheet of the same size as an anode. The SEM results showed that the close and uniform dispersi ...
DOI:
10.1016/j.chemosphere.2019.125124

11. Stable Full-Inkjet-Printed Solid-State Ag/AgCl Reference Electrode

Author:
Moya, Ana; Pol, Roberto; Martínez-Cuadrado, Alfonso; Villa, Rosa; Gabriel, Gemma; Baeza, Mireia
Source:
Analytical chemistry 2019 v.91 no.24 pp. 15539-15546
ISSN:
1520-6882
Subject:
sodium hypochlorite,   etc   ; electrochemistry; electrodes; silver; silver chloride;     Show all 5 Subjects
Abstract:
... With a growing demand for the availability of inexpensive, simple, and rapid prototyped devices, the prospect of miniaturization of the reference electrodes using printing techniques becomes promising. A stable and reusable full-inkjet-printed solid-state reference electrode (IPRE) was developed. The reference electrode was fully produced by consecutive inkjet printing of several layers. Ag ink wa ...
DOI:
10.1021/acs.analchem.9b03441

12. Experimental Evaluation of Oxidizing Breakers for a Polyacrylamide-Based Re-Crosslinkable Preformed Particle Gel

Author:
Wang, Ze; Bai, Baojun; Zhou, Enze; Pu, Jingyang; Schuman, Thomas
Source:
Energy & fuels 2019 v.33 no.6 pp. 5001-5010
ISSN:
1520-5029
Subject:
sodium hypochlorite,   etc   ; calcium hypochlorite; fuels; gels; temperature;     Show all 5 Subjects
Abstract:
... Re-crosslinkable preformed particle gel (RPPG) is a newly developed conformance control agent that can reassemble as an integrity after swelling in water. However, the RPPG has the potential to plug the injection facilities or wellbore if a treatment is not properly designed. This study focuses on selecting and evaluating the oxidizing breakers that can effectively degrade the RPPG. Bottle tests w ...
DOI:
10.1021/acs.energyfuels.9b00709

13. The extracellular thioredoxin Etrx3 is required for macrophage infection in Rhodococcus equi

Author:
Mourenza, Álvaro; Collado, Cristina; Bravo-Santano, Natalia; Gil, José A.; Mateos, Luís M.; Letek, Michal
Source:
Veterinary research 2020 v.51 no.1 pp. 38
ISSN:
1297-9716
Subject:
sodium hypochlorite,   etc   ; Rhodococcus equi; drug therapy; extracellular enzymes; genes; homeostasis; macrophages; mutants; pathogens; phagocytosis; survival rate; thioredoxins;     Show all 12 Subjects
Abstract:
... Rhodococcus equi is an intracellular veterinary pathogen that is becoming resistant to current antibiotherapy. Genes involved in preserving redox homeostasis could be promising targets for the development of novel anti-infectives. Here, we studied the role of an extracellular thioredoxin (Etrx3/REQ_13520) in the resistance to phagocytosis. An etrx3-null mutant strain was unable to survive within m ...
DOI:
10.1186/s13567-020-00763-3
PubMed:
32156317
PubMed Central:
PMC7063783

14. Thermal and non-thermal treatment effects on Staphylococcus aureus biofilms formed at different temperatures and maturation periods

Author:
Kim, Woo-Ju; Kim, Soo-Hwan; Kang, Dong-Hyun
Source:
Food research international 2020 v.137 pp. 109432
ISSN:
0963-9969
Subject:
sodium hypochlorite,   etc   ; Staphylococcus aureus; biofilm; biomass; exopolysaccharides; nonthermal processing; polymers; protein content; secretion; stainless steel; steam; temperature;     Show all 12 Subjects
Abstract:
... The objective of this study was to investigate the effect of temperature and maturation period on the resistance of Staphylococcus aureus biofilms to thermal and non-thermal treatments. First, biofilm development was compared at three different temperatures (15, 25, and 37°C) for 5 days. The cell population at 15 and 25°C remained relatively consistent approximately at 6.3 log CFU/cm², whereas 37° ...
DOI:
10.1016/j.foodres.2020.109432

15. Improving heavy metals removal, dewaterability and pathogen removal of waste activated sludge using enhanced chemical leaching

Author:
Zhang, Liguo; Chen, Ying; Ma, Caixia; Liu, Lei; Pan, Jingshi; Li, Biqing; Wu, Xuewei; Wang, Qilin
Source:
Journal of cleaner production 2020 v.271 pp. 122512
ISSN:
0959-6526
Subject:
sodium hypochlorite,   etc   ; activated sludge; biosolids; copper; ferric chloride; heavy metals; land application; leaching; nickel; pathogens; phosphorus; sodium nitrite; solubilization; zinc;     Show all 14 Subjects
Abstract:
... In order to enhance heavy metals removal, two enhanced chemical leaching techniques were examined comparatively using NaClO and NaNO₂ with the addition of FeCl₃. The phosphorus release, dewaterability and pathogen removal of treated sludge were also examined after chemical leaching. The results showed that the heavy metals solubilization, improvement of dewaterability and pathogen removal were sim ...
DOI:
10.1016/j.jclepro.2020.122512

16. Fabrication of pervaporation desalination membranes with excellent chemical resistance for chemical washing

Author:
Zhao, Pengbo; Xue, Yunlong; Zhang, Rui; Cao, Bing; Li, Pei
Source:
Journal of membrane science 2020 v.611 pp. 118367
ISSN:
0376-7388
Subject:
sodium hypochlorite,   etc   ; artificial membranes; brine solutions; chlorine; cleaning; crosslinking; desalination; pH; perfluorocarbons; pervaporation; polysorbates; soaking; sodium; sodium chloride; thermoplastics; washing;     Show all 16 Subjects
Abstract:
... Pervaporation membranes have exhibited great potential for desalinating brine solutions. However, the flux recovery after membrane washing and the membrane's resistance to chemical cleaning reagents were barely studied. Our group has reported excellent desalination properties of PVA based pervaporation membranes. Nevertheless, the membranes were damaged during chemical cleaning due to the poor chl ...
DOI:
10.1016/j.memsci.2020.118367

17. Effects of different hypochlorite types on the waste activated sludge fermentation from the perspectives of volatile fatty acids production, microbial community and activity, and characteristics of fermented sludge

Author:
Luo, Jingyang; Huang, Wenxuan; Zhang, Qin; Guo, Wen; Wu, Yang; Feng, Qian; Fang, Fang; Cao, Jiashun; Su, Yinglong
Source:
Bioresource technology 2020 v.307 pp. 123227
ISSN:
0960-8524
Subject:
sodium hypochlorite,   etc   ; acidification; activated sludge; additives; calcium hypochlorite; chemical oxygen demand; dewatering; fermentation; hydrolysis; microbial communities; solubilization; volatile fatty acids;     Show all 12 Subjects
Abstract:
... The effects of different hypochlorite types (namely Ca(OCl)₂ and NaOCl) on the waste activated sludge (WAS) anaerobic fermentation, and microbial community and activity were investigated. The results indicated that both Ca(OCl)₂ and NaOCl contributed to volatile fatty acids (VFAs) production by simultaneously enhancing the solubilization, hydrolysis and acidification processes. The maximal VFAs wa ...
DOI:
10.1016/j.biortech.2020.123227

18. Effect of treatments with UV-C light and electrolysed oxidizing water on decontamination and the quality of Gemlik black olives

Author:
Barut Gök, Sıla; Pazır, Fikret
Source:
Journal für Verbraucherschutz und Lebensmittelsicherheit 2020 v.15 no.2 pp. 171-179
ISSN:
1661-5751
Subject:
sodium hypochlorite,   etc   ; chlorine; decontamination; electrolysis; irradiation; microbial load; molds (fungi); olives; sensory properties; ultraviolet radiation; washing; yeasts;     Show all 12 Subjects
Abstract:
... The efficacy of ultraviolet-C (UV-C), electrolysed oxidizing water (EOW) and sodium hypochlorite (NaOCl) solution was investigated as non-thermal processes for the surface decontamination of olives. Olives were irradiated at different UV-C doses (0–4770 mJ/cm²) and washed with EOW and NaOCl solutions at different free chlorine concentrations (15, 30, 50, and 80 mg/L). The maximum reduction in micr ...
DOI:
10.1007/s00003-019-01263-z

19. Integration of sodium hypochlorite pretreatment with co-immobilized microalgae/bacteria treatment of meat processing wastewater

Author:
Hu, Xinjuan; Meneses, Yulie E.; Aly Hassan, Ashraf
Source:
Bioresource technology 2020 v.304 pp. 122953
ISSN:
0960-8524
Subject:
sodium hypochlorite,   etc   ; aerobes; bacteria; bacterial growth; biomass; chlorine; color; meat processing; microalgae; phosphates; pollutants; total nitrogen; wastewater;     Show all 13 Subjects
Abstract:
... Wastewater with 0.2, 0.4, 0.8, 1.0 mg/L free chlorine was biologically treated using co-immobilized microalgae/bacteria. In contrast, non-pretreated wastewater was treated with beads (control) and blank beads (blank) under the same operating condition. Results showed that NaClO pretreatment removed 8–33% total nitrogen (TN), 31–45% true color and 0.7–2.5 log CFU/mL aerobic-bacteria. At the end of ...
DOI:
10.1016/j.biortech.2020.122953

20. A new approach to large scale production of dimethyl sulfone: a promising and strong recyclable solvent for ligand-free Cu-catalyzed C–C cross-coupling reactions

Author:
Cheng, Shen; Wei, Wei; Zhang, Xingyu; Yu, Hewei; Huang, Mingming; Kazemnejadi, Milad
Source:
Green chemistry 2020 v.22 no.6 pp. 2069-2076
ISSN:
1463-9270
Subject:
sodium hypochlorite,   etc   ; Suzuki reaction; catalytic activity; copper; dimethyl sulfoxide; green chemistry; ligands; nitric acid; oxidants; oxidation; solvents; surveys;     Show all 12 Subjects
Abstract:
... Dimethyl sulfone (DMSN) was easily prepared through efficient oxidation of dimethyl sulfoxide (DMSO) and used as a strong and green solvent for organic reactions. A mixture of HNO₃/NaOCl was used as an oxidizing agent for efficient oxidation of DMSO to DMSN. The effect of DMSN was evaluated for copper-catalyzed coupling reactions. It is worth noting that DMSN could play the role of a ligand for co ...
DOI:
10.1039/c9gc04374h