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Journal of Materials Science & Technology 2022年第12期107卷 43-51页

作者： Junlei Wang Hongfang Liu Magdy El-Said Mohamed Mazen A.Saleh Tingyue Gu Department of Chemical and Biomolecular Engineering Institute for Corrosion and Multiphase TechnologyOhio UniversityAthensOH 45701USA School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China Research and Development Center Saudi Arabian Oil CompanyDhahran 31311Saudi Arabia

Tetrakis hydroxymethyl phosphonium sulfate(THPS) was enhanced by a 14-mer Peptide A, with its core12-mer sequence mimicking part of Equinatoxin II protein, in the mitigation of sulfate reducing Desulfovibrio ferrophilus MIC(microbiologically influenced corrosion) of X80 carbon steel. Results proved that50 ppm(w/w) THPS was sufficient to mitigate the D. ferrophilus biofilm, and its very agressive MIC(19.7mg/cm^(2) in 7 days or 1.31 mm/a), but not 20 ppm THPS. To achieve effective mitigation at a low dosage of THPS, biofilm-dispersing Peptide A was added to 20 ppm THPS in the culture medium. Sessile cell counts were reduced by 2-log and 4-log after enhancement by 10 ppb and 100 ppb Peptide A, respectively. Enhancement efficiency(further reduction in corrosion rate) reached 69% for 10 ppb Peptide A and 83% for100 ppb Peptide A compared with 20 ppm THPS alone treatment, indicating that Peptide A was a good biocide enhancer for THPS.

关键词： Microbiologically influenced corrosion Carbon steel Sulfate-reducing bacteria Biofilm biocide

Efficacy of natural biocide on control of microbial induced corrosion in oil pipelines mediated by Desulfovibrio vulgaris and Desulfovibrio gigas

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Journal of Environmental Sciences 2011年第8期23卷 1394-1402页

作者： Meeta Lavania Priyangshu M.Sarma Ajoy K.Mandal Simrita Cheema Banwari Lal TERI Darbari Seth BlockIndia Habitat CenterLodhi RoadNew Delhi 110003IndiaIndia

We compared the efficacy of a natural biocide with four chemical tetrakishydroxymethyl phosphonium sulfonate, benzyl trimethyl ammonium chloride, and formaldehyde, glutaraldehyde, to control microbial induced corrosion in oil pipelines. The efficacy of biocides were monitored against Desulfovibrio vulgaris and Desulfovibrio gigas in experimental pipes by measuring cell counts, H2S production, Fe（II） production, production of extracellular polymeric substances and structure of biofilm. The treatment with cow urine had minimum planktonic cell counts of 3 x 102 CFU/mL as well as biofilm cell counts of 9 x 101 CFU/mL as compared with tetrakishydroxyl methyl phosphonium sulfonate, benzyl trimethyl ammonium chloride, formaldehyde and glutaraldehyde. Sulfide production was the lowest with cow urine （0.08 mmol]L）, followed by tetrakishydroxymethyl phosphonium sulfonate 0.72 mmol]L. On day 90 of treatment, Fe（II） production was also found to be the lowest with cow urine. The scanning electron microscopic studies indicated that the biofilm bacteria were killed by cow urine. These results demonstrate the cow urine mediated control of microbially induced corrosion, and this is indicative of its potential as a viable substitute of toxic biocides. To the best of our knowledge, this seems to be the first report which screens possible biocidal activity by cow urine as compared to the most common bioeides which oil industry is currently using.

关键词： microbially induced corrosion biocide biofilm extraploymeric substances H2S production Fe(II) production

Health risks of pest control and disinfection workers after the COVID-19 outbreak in South Korea

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Journal of Environmental Sciences 2024年第5期139卷 350-363页

作者： Yun-Hee Choi Da-An Huh Lita Kim Sang ji Lee Kyong Whan Moon Department of Health and Safety Convergence Science Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841South Korea BK21 FOUR R&E Center for Learning Health System Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841South Korea Institute of Sciences Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841South Korea Department of Health and Environmental Science Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841South Korea

The exposure patterns of pest control and disinfection workers have changed after the coronavirus disease 2019(COVID-19)outbreak,but the health risks of chemical exposure have not been *** identified these workers’chemical exposure patterns and risks before and after the COVID-19 *** used data conducted between 2018(pre-pandemic)and 2021(post-pandemic)from three-year cross-sectional surveys on pest control and disinfection *** and dermal exposure concentrations were estimated using equations based on a biocidal product risk assessment model from the Korean National Institute of Environmental *** non-carcinogenic and carcinogenic risks of chemicals were calculated using the United States Environmental Protection Agency risk assessment *** found that the annual work frequency(50^(th)percentile)of foggers using disinfectants increased the most among all the work types,from 140 uses/year to 176 uses/year after the COVID-19 ***,all chemicals’non-carcinogenic and carcinogenic risks increased regardless of exposure *** the worst scenario(95^(th)percentile),the margin of exposure for citric acid,benzethonium chloride,benzyl-C12-16-alkyldimethyl chlorides,and sodium chlorite of inhalation exposure,and isopropyl alcohol and benzyl-C12-16-alkyldimethyl chlorides of dermal exposure were acceptable(>100)before the COVID-19outbreak but became unacceptable(10^(-6))before and after the COVID-19 outbreak but comparatively high after the COVID-19 ***,significantly more workers experienced health symptoms after the COVID-19outbreak(p<0.05),with the most common being muscle lethargy(31%),skin/face stinging(28.7%),and breath shortness/neck pain(24.1%).

关键词： biocide Disinfection Health risk assessment Occupational exposure Pest control

Application and Prospect of Organic biocides in Timber Preservation

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Chinese Forestry Science and Technology 2012年第3期11卷 79-80页

作者： Sun Fangli Bao Binfu Chen Anliang Zhou Yueying Yu Hongwei Du Chungui School of Engineering Zhejiang A & F University School of Forestry and Biotechnology Zhejiang A & F University

Organic biocides as timber preservatives have aroused more and more attention,because metal salts especially arsenic,chrome and so on, have been suspected to be poisonous to the soil and aquatic animals,as well as the disposal of preserved timber ***,a number of effective organic biocides have been selected to prevent wood or bamboo from decay,mildew, stain and so *** of these products have entered into the *** people’s increasing awareness of the environmental protection,organic biocides will eventually play important roles in timber preservation in the *** paper summarized the studies on application of organic biocides as wood or bamboo preservatives,including resistant mechanisms,commonly applied types and effects against wood or bamboo fungi,approaches to detecting the amount of organic biocides in timber and their influences on the *** on the discussion above,the authors predicted the developing prospect of organic biocides in timber preservation.

关键词： forest engineering organic biocide timber preservation application review

Effect of organic silicon quaternary ammonium salts on mitigating corrosion of reinforced steel induced by SRB in mild alkaline simulated concrete pore solution

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Journal of Materials Science & Technology 2021年第5期64卷 126-140页

作者： Ini-Ibehe Nabuk Etim Junhua Dong Jie Wei Chen Nan Durga Bhakt Pokharel Aniefiok Joseph Umoh Dake Xu Mingzhong Su Wei Ke Environmental Corrosion Centre Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences 19A Yuquan Road Shijingshan DistrictBeijing 100049China Department of Marine Biology Akwa Ibom State UniversityP.M.B.1167UyoNigeria School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Sani-care Salon Products Inc.USA

The corrosion damage of 20 SiMn steel by sulphate-reducing bacteria(SRB)and the mitigation effect of organic silicon quaternary ammonium salt(OSA)were studied in sterilized mild alkaline simulated concrete pore solution(STR)with different additions of SRB and OSA at pH 9.35 for 28 *** corrosion occurs in STR medium while slight localized corrosion is observed in STR+OSA medium,and localized pitting corrosion occurs in STR+SRB and STR+SRB+OSA *** largest pit depth reduces from 36.70μm in STR+SRB medium to 3.31μm in STR+SRB+OSA medium due to the mitigation effect of *** corrosion rate reflected by weight loss and electrochemical impedance spectroscopy(EIS)results presents the order of STR

关键词： Steel reinforced concrete Microbial corrosion biocide EIS

Effect of Oxygen and Bacteria on the Property of Polymer Gel

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Journal of Natural Gas Chemistry 2007年第4期16卷 437-441页

作者： Weidong Jiang Xiangguo Lu Xinxia Xu Laboratory of Enhanced Recovery of Education Ministry Daqing Petroleum Institute Daqing 163318 Heilongjiang China

The viscosity property of Cr^3＋, Al^3＋, and compound ion cross-linked polymer gel solution in the anaerobic and aerobic environment was investigated aiming at meeting the practical demand of the oil field. The viscosity reserving effect after adding the biocide and the gelation in the anaerobic and aerobic environments was also studied in the paper. The results indicate that the viscosity of the cross-linked polymer gel solution caused by the water produced in aerobic environment is higher than that in anaerobic environment, and that the viscosity value of the cross-linked polymer gel solutions after adding biocides has improved to some extent and polymer gel has gelated well in anaerobic environment.

关键词： anaerobic and aerobic environment cross-linked polymer viscosity biocide experimental research

Metabolic Response of the Two Marine Unicellular Algae <i>Chlorella salina</i>and <i>Dunaliella bardawil</i>to Toxicity of the Antifouling Agent Irgarol 1051

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Journal of Environmental Protection 2018年第9期9卷 895-911页

作者： Mona Kaamoush The Arab Academy for Science & Technology Alexandria Egypt

Toxic pollutants are metabolic poisons that can seriously injure or destroy the photosynthetic organisms upon which the food chain depends. Since microalgae play a key role in marine ecosystems, marine microalgae are proposed as excellent bio-indicators of pollution due to their high sensitivity, which can give warning of the toxic effects of chemicals sooner than any other species. The aim of this work concentrated on the effect of different concentrations of the antifouling biocide (Irgarol 1051) on growth and chlorophylls content (as an essential metabolite) of the two marine unicellular green algae Chlorella salina and Dunaliella bardawil that usually used in fish feeding. The growth of the wall-less Dunaliella bardawil was more sensitive to Irgarol 1051 than the walled cells Chlorella salina, although the concentrations used were greatly different. The product of photosynthesis in the two algal species greatly affected since in the presence of Irgarol 1051, a serious destructive effect was observed. The cell wall appeared to play a significant role in protecting the organism against toxicity of the antifouling agent either by adsorption or degradation. The strength of toxicity depends mainly on the concentration of the antifouling agent, the length of culturing period and the type of organism tested.

关键词： Antifouling biocide Irgaol 1051 Chlorella salina Dunaliella bardawil