scholarly journals Effect of Gas Holdup on CO2 Biofixation by Spirulina sp. in the 20-liter Airlift Bioreactor

2021 ◽  
Author(s):  
Zahra Zarei ◽  
Peyman Malekshahi ◽  
Mohammad Hossein Morowvat ◽  
Rahbar Rahimi ◽  
Seyyed Vahid Niknezhad
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Sequestration ◽  
Cost Effective ◽  
Dry Weight ◽  
Airlift Bioreactor ◽  
Dark Cycle ◽  
Carbon Dioxide Uptake ◽  
Hydrodynamic Parameters ◽  
The Earth ◽  
Bubble Sizes

Abstract The rise of CO2 concentration in the Earth is a major environmental problem, which cause global warming. To solve this issue, several methods have been applied, but among these solutions using microalgae is an eco-friendly and cost-effective way of reducing carbon dioxide, as they can efficiently sequestrate CO2 and produce biomass as valuable products. In this study, hydrodynamic parameters, bubble sizes and carbon dioxide uptake were investigated in an airlift bioreactor. Experiments were studied at two different superficial gas velocities (0.185 and 0.524 cm/s) for Spirulina sp. microalgae into a 20-liter airlift bioreactor to find out the amount of carbon dioxide sequestration and cyanobacterial biomass. The highest efficiency of carbon dioxide removal and maximum dry weight of Spirulina sp. were achieved 55.48% and 0.86 g/L respectively at 5% CO2 (v/v) and superficial velocity of 0.185 cm/s. This experiment was conducted in 7 days, light intensity (2600 lux/m2), temperature (30\(\pm\)2 °C) and a light-dark cycle (12–12), which all were constant. The hydrodynamic parameters studied by Spirulina sp. demonstrated a capability of CO2 sequestration in this airlift photobioreactor.

Photosynthesis of wheat under field conditions. III. Seasonal trends in carbon dioxide uptake of crop communities

1971 ◽  
Vol 22 (1) ◽  
pp. 1 ◽  
Author(s):  
DW Puckridge
Keyword(s):  
Carbon Dioxide ◽  
Grain Yield ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Dry Weight ◽  
Field Conditions ◽  
Wheat Cultivars ◽  
Area Index ◽  
Carbon Dioxide Uptake ◽  
Assimilation Chamber

Photosynthesis of two wheat cultivars grown in the field was examined during three seasons by use of a portable field assimilation chamber. There were large differences in dry weight, leaf area, and carbon dioxide uptake between seasons. Variations in carbon dioxide uptake by the community were related mainly to changes in leaf area index (LAI). There were changes in carbon dioxide uptake per unit LAI with time, and between the two cultivars in the first season, but the effects of these changes were small compared with the effects of LAI. Differences in grain yield were correlated with LAI and carbon dioxide uptake in the period after anthesis.

scholarly journals Facile synthesis of cost-effective porous aromatic materials with enhanced carbon dioxide uptake

2013 ◽  
Vol 1 (44) ◽  
pp. 13926 ◽  
Author(s):  
Xiaofei Jing ◽  
Donglei Zou ◽  
Peng Cui ◽  
Hao Ren ◽  
Guangshan Zhu
Keyword(s):  
Carbon Dioxide ◽  
Cost Effective ◽  
Facile Synthesis ◽  
Carbon Dioxide Uptake

scholarly journals ATMOSPHERIC CARBON DIOXIDE SEQUESTRATION TROUGH KARST DENUDATION PROCESS: Preliminary Estimation from Gunung Sewu Karst

2017 ◽  
Author(s):  
Eko Haryono ◽  
Tjahyo Nugroho Adji ◽  
M Widyastuti ◽  
Sutanto Trijuni P
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Climate Change Mitigation ◽  
Carbon Dioxide Sequestration ◽  
Total Calcium ◽  
The Earth ◽  
Karst Areas ◽  
Karst Ecosystem ◽  
Atmospheric Carbon ◽  
Change Mitigation

Karst ecosystem is known as one of the major terrestrial carbon sinks on the earth. It owes its importantnot only because it stores carbon binding rocks but also because karstification itself is a carbon dioxidesequestration process. The paper documented here is an estimation of carbon dioxide sequestration underkarst denudation process. Denudation rate was acquired from previous works suggesting that denudationrate of Gunung Sewu Karst is 50.91 m3/year/km2. Taking account the area of Gunung Sewu Karst as1300 km2, total calcium carbonate removed from the area is 165.464 ton/year. Every tonne of limestonedissolved, 0.12 ton of atmospheric carbon is absorbed. In total, Gunung Sewu Karst up takes 19,855.68ton carbon per year or equivalent to 72.804.16 ton/year atmospheric carbon dioxide. This figure is onlyfrom denudation process. Considering carbon sequestration through biomass production throughagricultural practices, Gunung Sewu Karst ecosystem and other karst areas of Indonesia accordinglyowes considerable role in climate change mitigation.

scholarly journals ATMOSPHERIC CARBON DIOXIDE SEQUESTRATION TROUGH KARST DENUDATION PROCESS Preliminary Estimation from Gunung Sewu Karst

2017 ◽  
Author(s):  
Tjahyo Nugroho Adji ◽  
Eko Haryono ◽  
M Widyastuti ◽  
Sutanto Trijuni P
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Climate Change Mitigation ◽  
Carbon Dioxide Sequestration ◽  
Total Calcium ◽  
The Earth ◽  
Karst Areas ◽  
Karst Ecosystem ◽  
Atmospheric Carbon ◽  
Change Mitigation

Karst ecosystem is known as one of the major terrestrial carbon sinks on the earth. It owes its importantnot only because it stores carbon binding rocks but also because karstification itself is a carbon dioxidesequestration process. The paper documented here is an estimation of carbon dioxide sequestration underkarst denudation process. Denudation rate was acquired from previous works suggesting that denudationrate of Gunung Sewu Karst is 50.91 m3/year/km2. Taking account the area of Gunung Sewu Karst as 1300km2, total calcium carbonate removed from the area is 165,464 ton/year. Every tonne of limestonedissolved, 0.12 ton of atmospheric carbon is absorbed. In total, Gunung Sewu Karst up takes 19,855.68ton carbon per year or equivalent to 72,804.16 ton/year atmospheric carbon dioxide. This figure is onlyfrom denudation process. Considering carbon sequestration through biomass production throughagricultural practices, Gunung Sewu Karst ecosystem and other karst areas of Indonesia accordingly owesconsiderable role in climate change mitigation.

Geological Carbon Dioxide Sequestration

Elements ◽  
2007 ◽  
Vol 3 (3) ◽  
pp. 179-184 ◽  
Author(s):  
S. J. Friedmann
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Sequestration

scholarly journals Phytoextraction of Lead Using a Hedge Plant [Alternanthera bettzickiana (Regel) G. Nicholson]: Physiological and Biochemical Alterations through Bioresource Management

2021 ◽  
Vol 13 (9) ◽  
pp. 5074
Author(s):  
Urooj Kanwal ◽  
Muhammad Ibrahim ◽  
Farhat Abbas ◽  
Muhammad Yamin ◽  
Fariha Jabeen ◽  
...  
Keyword(s):  
Citric Acid ◽  
Growth Parameters ◽  
Cost Effective ◽  
Dry Weight ◽  
Citric Acid Concentration ◽  
Biochemical Alterations ◽  
Biomass Plant ◽  
Environmentally Friendly Approach ◽  
Pb Concentration

Phytoremediation is a cost-effective and environmentally friendly approach that can be used for the remediation of metals in polluted soil. This study used a hedge plant–calico (Alternanthera bettzickiana (Regel) G. Nicholson) to determine the role of citric acid in lead (Pb) phytoremediation by exposing it to different concentrations of Pb (0, 200, 500, and 1000 mg kg−1) as well as in a combination with citric acid concentration (0, 250, 500 µM). The analysis of variance was applied on results for significant effects of the independent variables on the dependent variables using SPSS (ver10). According to the results, maximum Pb concentration was measured in the upper parts of the plant. An increase in dry weight biomass, plant growth parameters, and photosynthetic contents was observed with the increase of Pb application (200 mg kg−1) in soil while a reduced growth was experienced at higher Pb concentration (1000 mg kg−1). The antioxidant enzymatic activities like superoxide dismutase (SOD) and peroxidase (POD) were enhanced under lower Pb concentration (200, 500 mg kg−1), whereas the reduction occurred at greater metal concentration Pb (1000 mg kg−1). There was a usual reduction in electrolyte leakage (EL) at lower Pb concentration (200, 500 mg kg−1), whereas EL increased at maximum Pb concentration (1000 mg kg−1). We concluded that this hedge plant, A. Bettzickiana, has the greater ability to remediate polluted soils aided with citric acid application.

Monte Carlo Molecular Simulation Study of Carbon Dioxide Sequestration into Dry and Wet Calcite Pores Containing Methane

2021 ◽  
Author(s):  
Srikanth Ravipati ◽  
Mirella Simoes Santos ◽  
Ioannis G. Economou ◽  
Amparo Galindo ◽  
George Jackson ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Monte Carlo ◽  
Molecular Simulation ◽  
Simulation Study ◽  
Carbon Dioxide Sequestration

Carbonation possibilities of Steel slags -- a review

2021 ◽  
Author(s):  
Raghavendra Ragipani ◽  
Sankar Bhattacharya ◽  
Akkihebbal K. Suresh
Keyword(s):  
Carbon Dioxide ◽  
Time Scales ◽  
Carbon Dioxide Sequestration ◽  
Mineral Carbonation ◽  
Geological Time ◽  
The Stability ◽  
Significant Attention

Research pertaining to carbon dioxide sequestration via mineral carbonation has gained significant attention, primarily due to the stability of sequestered \ce{CO2} over geological time scales. Use of industry-derived alkaline wastes...

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