Calibration of CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Trapping in Alkaline Solutions during Soil Incubation at Varying Temperatures Using a Respicond VI

Смирнова, Н. В.; Demyan, Michael Scott; Rasche, Frank; Cadisch, Georg; Müller, Torsten

doi:10.4236/ojss.2014.45019

Cited by 16 publications

(8 citation statements)

References 7 publications

(8 reference statements)

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“…The conductance of the KOH solution can be measured and recorded at user-defined intervals (≥20 min): the present study employed 1 h intervals. The amount of absorbed CO 2 (mg) was calculated (Equation (2)) [ 31 ] by the Respicond’s native software.

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Section: Methodsmentioning

confidence: 99%

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

et al. 2021

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The predicted growth in plastic demand and the targets for global CO2 emission reductions require a transition to replace fossil-based feedstock for polymers and a transition to close- loop recyclable, and in some cases to, biodegradable polymers. The global crisis in terms of plastic littering will furthermore force a transition towards materials that will not linger in nature but will degrade over time in case they inadvertently end up in nature. Efficient systems for studying polymer (bio)degradation are therefore required. In this research, the Respicond parallel respirometer was applied to polyester degradation studies. Two poly(lactic-co-glycolic acid) copolyesters (PLGA12/88 and PLGA6/94) were tested and shown to mineralise faster than cellulose over 53 days at 25 °C in soil: 37% biodegradation for PLGA12/88, 53% for PLGA6/94, and 30% for cellulose. The corresponding monomers mineralised much faster than the polymers. The methodology presented in this article makes (bio)degradability studies as part of a materials development process economical and, at the same time, time-efficient and of high scientific quality. Additionally, PLGA12/88 and PLGA6/94 were shown to non-enzymatically hydrolyse in water at similar rates, which is relevant for both soil and marine (bio)degradability.

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…”

Section: Methodsmentioning

confidence: 99%

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

et al. 2021

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“…Its intensity is an important index for measuring total microbial activity [8,9]. Soil enzyme serves as a biological index of soil quality and as an indicator for evaluating soil fertility [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of heavy metal Cd pollution on microbial activities in soil

Shi¹,

Ma²

2017

Ann Agric Environ Med.

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Weilin Shi, Xiying Ma. Effects of heavy metal Cd pollution on microbial activities in soil. Ann Agric Environ Med. 2017; 24(4): 722-725. doi: 10.26444/aaem/80920 AbstractHeavy metal contamination of soil occurs when heavy metals are introduced to soil through human activities, leading to the gradual deterioration of the ecology and environment. Microorganism activity reflects the intensity of various biochemical reactions in soil, and changes in it reflect the level of heavy metal pollution affecting the soil. The effects were studied of heavy metal Cd on the microbial activity of soil at different concentrations by investigating the respiratory intensity, urease activity, and catalase activity in forest soil and garden soil. The results showed that the respiratory intensity, urease and catalase activities in the garden soil were all higher than in the forest soil. Cd has obvious inhibitory effects on microbial activities. The three parameters exhibited a downward trend with increasing concentrations of Cd. Catalase activity increased when the mass concentration of Cd reached 1.0 mg/kg, indicating that low concentrations of Cd can promote the activity of some microorganisms. Respiratory intensity and urease activity also increased when the concentration reached 10.0 mg/ kg, showing that respiratory intensity and urease activity have strong response mechanisms to adverse conditions. The effective state of Cd in soil, as well as inhibition of microbial activity, decreased with incubation time.

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“…The forward reaction in eq 5 is also enhanced by saturating the electrolyte solution with CO 2 . As the alkalinity of the electrolyte solution has been maintained by adding KOH, this KOH reacts with CO 2 and produces KHCO 3 according to the work reported by Smirnova et al 51 Hence, the concentration of HCO 3 − gets increased with increasing the alkalinity of the solution, which ultimately enhances the formation of formic acid. As a result, both Conc avg and FE avg are increasing with increasing pH of the electrolyte from 8.5 to 9.5.…”

Section: Methodsmentioning

confidence: 89%

Continuous Semi-Micro Reactor Prototype for the Electrochemical Reduction of CO₂into Formic Acid

Sinha

Bisht

Rarotra

et al. 2020

Ind. Eng. Chem. Res.

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In this article, we have reported the electrochemical reduction of CO2 in a continuous semi-micro reactor for the synthesis of formic acid (HCOOH). The reactor was fabricated with polydimethylsiloxane by following the microwire molding technique. Tin (Sn) nanocatalyst-deposited graphite rod was used as the cathode for the electrochemical reduction of CO2 to HCOOH. We performed the reactions in an alkaline environment at different pH values and different applied voltages for 1200 s to obtain an optimum condition for HCOOH production. The maximum Faradaic efficiency (FE) values of 84.25 and 57.69% were obtained at 2.5 and 3 V, respectively, after 300 s at an initial pH value of 9.5. It was found that the continuous reactor showed higher FE values than the batch reactor. It was also noted that the HCOOH concentration in the batch reactor was continuously decreasing with time, whereas it was almost constant in the continuous semi-micro reactor.

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Calibration of CO<sub>2</sub> Trapping in Alkaline Solutions during Soil Incubation at Varying Temperatures Using a Respicond VI

Cited by 16 publications

References 7 publications

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

Effects of heavy metal Cd pollution on microbial activities in soil

Continuous Semi-Micro Reactor Prototype for the Electrochemical Reduction of CO₂into Formic Acid

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Calibration of CO&lt;sub&gt;2&lt;/sub&gt; Trapping in Alkaline Solutions during Soil Incubation at Varying Temperatures Using a Respicond VI

Cited by 16 publications

References 7 publications

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

Biodegradation and Non-Enzymatic Hydrolysis of Poly(Lactic-co-Glycolic Acid) (PLGA12/88 and PLGA6/94)

Effects of heavy metal Cd pollution on microbial activities in soil

Continuous Semi-Micro Reactor Prototype for the Electrochemical Reduction of CO2into Formic Acid

Contact Info

Product

Resources

About

Calibration of CO<sub>2</sub> Trapping in Alkaline Solutions during Soil Incubation at Varying Temperatures Using a Respicond VI

Continuous Semi-Micro Reactor Prototype for the Electrochemical Reduction of CO₂into Formic Acid