The rate of iron corrosion for different organic carbon sources during biofilm formation

2007 ◽  
Vol 55 (8-9) ◽  
pp. 489-497 ◽  
Author(s):  
S.-K. Park ◽  
S.-C. Choi ◽  
Y.-K. Kim
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Corrosion Rate ◽  
Humic Substances ◽  
Carbon Sources ◽  
Biofilm Reactor ◽  
Major Constituent ◽  
Iron Corrosion ◽  
Organic Carbon Sources ◽  
Biofilm Bacteria

The effects of total organic carbon and biofilm on microbial corrosion were quantified using serum bottles in a 2×2 factorial design. Both organic carbon and biofilm bacteria had a significant effect on the iron corrosion rate, irrespective of the levels of the other variable (p=0.05). There was no evidence of interaction between organic carbon and biofilm bacteria. Within the tested levels, the addition of exogenous organic carbon increased the corrosion rate by an average of 3.838 mg dm−2 day−1 (mdd), but the presence of biofilm bacteria decreased the rate by an average of 2.305 mdd. More iron was released from the coupon in response to organic carbon. Powder x-ray diffractometry indicated that the scales deposited on the corroded iron surface consisted primarily of lepidocrocite (γ-FeOOH), magnetite (Fe3O4) and hematite (α-Fe2O3). Corrosion rates by different organic carbon sources, i.e. acetate, glucose and humic substances, were compared using an annular biofilm reactor. One-way ANOVA suggested that the effect of each carbon source on corrosion was not the same, with the iron corrosion rate highest for glucose, followed by acetate, humic substances and the control. Magnetite was a major constituent of the corrosion products scraped from iron slides. Examination of community-level physiological profile patterns on the biofilms indicated that acetate was a carbon source that could promote the metabolic and functional potentials of biofilm communities.

Effect on the Characteristic and Properties of Carbon Coated LiFePO4/C Composite

2011 ◽  
Vol 689 ◽  
pp. 367-371
Author(s):  
Yu Li Zhang ◽  
Zhi Jian Liu ◽  
Jian Hua Xia ◽  
Xi Lin ◽  
Lu Xing Chen
Keyword(s):  
Carbon Source ◽  
Organic Carbon ◽  
Carbon Sources ◽  
Thermal Reduction ◽  
Reduction Technique ◽  
High Rate ◽  
Tap Density ◽  
Organic Carbon Sources ◽  
Different Types ◽  
Carbon Coated

LiFePO4/C composite with different types of organic carbon sources has been synthesized by carbon thermal reduction technique. The physical characteristics and electrochemical properties of LiFePO4/C composite have been studied compared with commercial products. It is shown that good carbon-coated LiFePO4/C composite can be obtained with 13wt.% glucose as carbon source, which has effected on the good processing performance due to its suitable specific surface area of 26.3m2/g and high tap density of 1.3g/cm3. Furthermore, it has contributed to the high-rate electrochemical property with discharge capacity of 128mAh/g at 1C (1C=170 mAh/g).

Effects of Different Organic Carbon Sources on Properties of LiFePO4/C Synthesized by Spray-Drying

2014 ◽  
Vol 535 ◽  
pp. 725-728 ◽  
Author(s):  
Cheng Lu ◽  
Lin Chen ◽  
Yun Bo Chen ◽  
Yi Jie Gu ◽  
Meng Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
Carbon Source ◽  
Organic Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Spray Drying ◽  
Specific Surface Area ◽  
Carbon Sources ◽  
Tap Density ◽  
Organic Carbon Sources

LiFePO4/C materials were synthesized by spray-drying using FePO4·2H2O, LiOH·H2O as raw materials, with three kinds of organic carbon sources: soluble starch, crystal sugar and glucose. The particle size, tap density, specific surface area, morphology, structure and electrochemical properties of the LiFePO4/C were tested and analyzed. The results indicate that the organic carbon source has no effect on the phase of LiFePO4, but has a remarkable influence on the tap density and specific surface area of LiFePO4. The LiFePO4/C synthesized with crystal sugar and glucose has higher tap density, smaller particle size and specific surface area. The LiFePO4/C synthesized with the glucose as the carbon source exhibited the most excellent electrochemical performance. The discharge capacities are 160.6, 148.5 and 114.1mAh/g respectively at 0.1C, 1C and 5C. Under low temperature 253K, the discharge capacity is 56.2% of that at 298K with 0.2C.

Assimilation of various organic carbon sources by Haematococcus strains

2009 ◽  
Vol 57 (2) ◽  
pp. 231-237
Author(s):  
M. Zych ◽  
A. Stolarczyk ◽  
K. Maca ◽  
A. Banaś ◽  
K. Termińska-Pabis ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Organic Compounds ◽  
Present Experiment ◽  
Carbon Sources ◽  
Growth Conditions ◽  
Mixotrophic Growth ◽  
Naturally Occurring ◽  
Organic Carbon Sources ◽  
Secondary Carotenoids ◽  
Colour Changes

Differences in the assimilation of individual organic compounds (5 mM sugars and L-asparagine) under mixotrophic growth conditions were described for three naturally occurring Haematococcus strains.The effects of assimilation were measured by the growth intensity and size of algal cells, and the effect of colour changes in the cultures was observed. Some compounds caused the cell colouration to change from green to yellow, being the result of chlorophyll disappearance and the accumulation of yellow secondary carotenoids. In the present experiment none of the cultures turned red, thus excluding the intense accumulation of the commercially interesting carotenoid, astaxanthin.

Role of Organic Carbon Sources and Sulfate in Controlling Net Methylmercury Production in Riverbank Sediments of the South River, VA (USA)

2017 ◽  
Vol 35 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Krista M. A. Paulson ◽  
Carol J. Ptacek ◽  
David W. Blowes ◽  
W. Douglas Gould ◽  
Jing Ma ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Sources ◽  
The South ◽  
Organic Carbon Sources ◽  
Methylmercury Production

scholarly journals Modelling landscape controls on dissolved organic carbon sources and fluxes to streams

2014 ◽  
Vol 122 (2-3) ◽  
pp. 361-374 ◽  
Author(s):  
J. J. Dick ◽  
D. Tetzlaff ◽  
C. Birkel ◽  
C. Soulsby
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Sources ◽  
Organic Carbon Sources

Analysis of organic carbon sources in tropical seagrass fish: a case study of the east coast of Hainan Province

2019 ◽  
Vol 15 (8-9) ◽  
pp. 513-522 ◽  
Author(s):  
Jianguo Du ◽  
Zehao Chen ◽  
Meiling Xie ◽  
Mingru Chen ◽  
Xinqing Zheng ◽  
...  
Keyword(s):  
Organic Carbon ◽  
East Coast ◽  
Carbon Sources ◽  
Hainan Province ◽  
Organic Carbon Sources

scholarly journals Use of Combined Microautoradiography and Fluorescence In Situ Hybridization To Determine Carbon Metabolism in Mixed Natural Communities of Uncultured Bacteria from the GenusAchromatium

2000 ◽  
Vol 66 (10) ◽  
pp. 4518-4522 ◽  
Author(s):  
N. D. Gray ◽  
R. Howarth ◽  
R. W. Pickup ◽  
J. Gwyn Jones ◽  
I. M. Head
Keyword(s):  
In Situ Hybridization ◽  
Organic Carbon ◽  
Fluorescence In Situ Hybridization ◽  
Carbon Metabolism ◽  
Carbon Sources ◽  
Uncultured Bacteria ◽  
Sulfur Bacteria ◽  
Organic Carbon Sources ◽  
Natural Communities

ABSTRACT Combined microautoradiography and fluorescence in situ hybridization (FISH) was used to investigate carbon metabolism in uncultured bacteria from the genus Achromatium. All of theAchromatium species identified in a freshwater sediment from Rydal Water, Cumbria, United Kingdom, which were distinguishable only by FISH, assimilated both [14C]bicarbonate and [14C]acetate. This extends previous findings thatAchromatium spp. present at another location could only utilize organic carbon sources. Achromatium spp., therefore, probably exhibit a range of physiologies, i.e., facultative chemolithoautotrophy, mixotrophy, and chemoorganoheterotrophy, similar to other large sulfur bacteria (e.g., Beggiatoa spp.).

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