Enhancement effects of ferric ion concentrations on growth and lipid characteristics of freshwater microalga Chlorococcum oleofaciens KF584224.1 for biodiesel production

The ability ofAcidithiobacillus ferrooxidansto get its energy from the oxidation of ferrous iron and the inhibitory effect of high ferric iron concentrations on its growth behaviour has been extensively studied. Furthermore it is known thatA. ferrooxidansexudes organic substances called extracellular polymeric substances (EPS), which could play a role in its protection against adverse environmental conditions. In this context, the aim of this work was to study the production of EPS during adaptation ofA. ferrooxidansto high ferric ion concentrations. The experiments were performed in shake flasks of 250 mL at 30 °C, 200 rpm and at an initial pH of 1.8. In order to establish the natural tolerance of the strain, its growth behaviour was evaluated at high ferric iron concentrations by adding consecutively the equivalent of 9 g/L of ferrous iron each time it was depleted in the broth. Cell growth stopped once ferric iron concentration increased up to 38 g/L. The adaptation consisted in eight sub-cultures run in parallel at initial concentrations of ferrous iron of 18, 27 and 36 g/L. The EPS was quantified as micro volumes using confocal laser scanning microscopy (CLSM), labelling the cells with propidium iodide and EPS carbohydrates with wheat germ agglutinin (WGA). During the adaptation procedure it was observed an increase in the ferric ion volumetric productivity of subcultures run with 27 and 36 g/L, as a result of cell adaptation. The amount of EPS exuded by cells was higher along with those experimental conditions having higher ferric iron concentrations. It was not detected EPS on cells grown on 9 g/L of ferrous iron. This study found that the adapted strain showed higher production of EPS at high ferric ion concentrations and higher ferric ion tolerance than non-adapted ones.

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A Recyclable Optical Fiber Sensor Based on Fluorescent Carbon Dots for the Determination of Ferric Ion Concentrations

Journal of Lightwave Technology ◽

10.1109/jlt.2019.2922375 ◽

2019 ◽

Vol 37 (18) ◽

pp. 4815-4822

Author(s):

Haitao Lin ◽

Jun Huang ◽

Liyun Ding

Keyword(s):

Optical Fiber ◽

Carbon Dots ◽

Optical Fiber Sensor ◽

Fiber Sensor ◽

Ferric Ion ◽

Ion Concentrations ◽

Fluorescent Carbon Dots ◽

Fluorescent Carbon

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Oxidation of nitrobenzene by O3/UV: the influence of H2O2 and Fe(III). Experiences in a pilot plant

Water Science & Technology ◽

10.2166/wst.2001.0246 ◽

2001 ◽

Vol 44 (5) ◽

pp. 39-46 ◽

Cited By ~ 20

Author(s):

S. Contreras ◽

M. Rodríguez ◽

E. Chamarro ◽

S. Esplugas ◽

J. Casado

Keyword(s):

Hydrogen Peroxide ◽

Pilot Plant ◽

Advanced Oxidation Processes ◽

Degradation Rate ◽

Advanced Oxidation ◽

The Other ◽

Ferric Ion ◽

Effect Of Ph ◽

Ion Concentrations ◽

Oxidation Processes

The degradation of nitrobenzene using some advanced oxidation processes (O3/UV, O3/UV/H2O2 and O3/UV/Fe(III)) has been investigated. In the combined O3/UV process, the effect of pH and ozone was studied. In the other combinations, the influence of the amount of hydrogen peroxide and ferric ion in the degradation rate and TOC evolution, has been studied. Under our conditions, the combination O3/UV did not improve the degradation rate obtained by ozonation. The best TOC decrease was obtained when the O3/UV process was carried out at low ferric ion concentrations.

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Effect of high ferric ion concentrations on total lipids and lipid characteristics of Tetraselmis subcordiformis, Nannochloropsis oculata and Pavlova viridis

Journal of Applied Phycology ◽

10.1007/s10811-013-0056-x ◽

2013 ◽

Vol 26 (1) ◽

pp. 105-114 ◽

Cited By ~ 18

Author(s):

Xuxiong Huang ◽

Likun Wei ◽

Zhengzheng Huang ◽

Jiaqi Yan

Keyword(s):

Nannochloropsis Oculata ◽

Ferric Ion ◽

Total Lipids ◽

Ion Concentrations ◽

Tetraselmis Subcordiformis ◽

Pavlova Viridis

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Biodiesel production from non-edible oils: A review

WEENTECH Proceedings in Energy ◽

10.32438/wpe.0602149 ◽

2020 ◽

pp. 149-159

Author(s):

Jatinder Kataria ◽

Saroj Kumar Mohapatra ◽

Amit Pal

Keyword(s):

Environmental Impact ◽

Energy Demand ◽

Fossil Fuels ◽

World Wide ◽

Edible Oils ◽

Control Measure ◽

Biodiesel Production ◽

Pollution Level ◽

Animal Fats ◽

The World

The limited fossil reserves, spiraling price and environmental impact due to usage of fossil fuels leads the world wide researchers’ interest in using alternative renewable and environment safe fuels that can meet the energy demand. Biodiesel is an emerging renewable alternative fuel to conventional diesel which can be produced from both edible and non-edible oils, animal fats, algae etc. The society is in dire need of using renewable fuels as an immediate control measure to mitigate the pollution level. In this work an attempt is made to review the requisite and access the capability of the biodiesel in improving the environmental degradation.

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PENGARUH PELARUT KLOROFORM DALAM PEMURNIAN GLISEROL DENGAN PROSES ASIDIFIKASI ASAM KLORIDA

Jurnal Teknik Kimia USU ◽

10.32734/jtk.v5i3.1543 ◽

2016 ◽

Vol 5 (3) ◽

pp. 38-43

Author(s):

Windi Monica Surbakti ◽

Gerson Rico M.H ◽

Mersi Suriani Sinaga

Keyword(s):

Fatty Acid ◽

Volume Ratio ◽

Biodiesel Production ◽

Extraction Time ◽

Glycerol Concentration ◽

Purification Process ◽

Soap Content ◽

Test Volume ◽

Base Content ◽

Water Salt

Glycerol as a byproduct of biodiesel production was approximately formed 10% of the biodiesel weight. Impurities which contained in the glycerol such as catalyst, soap, methanol, water, salt, and matter organic non glycerol (MONG) have a significant effect on the glycerol concentration. So, it is necessary to treat the impurities. The purpose of this study is to know the effect of chloroform to glycerol purification process with acidification method using hydrochloric acid as pretreatment process. This research was begun with acid addition to the glycerol to neutralize the base content and to split the soap content into free fatty acid and salt, that are more easily separated from glycerol. Then the process was continued with extraction by the solvent chloroform using the variable of test volume ratio (v/v) (1:1, 1:1.5, 1:2) and the extraction time (20, 40, and 60 minutes). The results showed that the more volume of solvent used, gave less extraction time to produce high purity of glycerol. The highest purity produced in this study amounted to 90,9082% is obtained at the ratio of the volume solvent (v/v) 1:1 with extraction time 60 minutes.

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