Effect of the Concrete Slurry Waste Ratio on Supercritical CO2 Sequestration

Sim, Sang-Rak; Ryu, Dong-Woo

doi:10.3390/ma16020742

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…The increase in production and population is inextricably linked to the emission and production of larger amounts of solid, liquid and gaseous waste. This is particularly evident in urban agglomerations, where population growth is accompanied by an increased amount of municipal and sewage waste [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Municipal Sewage Sludge as a Source for Obtaining Efficient Biosorbents: Analysis of Pyrolysis Products and Adsorption Tests

et al. 2023

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In the 21st century, the development of industry and population growth have significantly increased the amount of sewage sludge produced. It is a by-product of wastewater treatment, which requires appropriate management due to biological and chemical hazards, as well as several legal regulations. The pyrolysis of sewage sludge to biochar can become an effective way to neutralise and use waste. Tests were carried out to determine the effect of pyrolysis conditions, such as time and temperature, on the properties and composition of the products obtained and the sorption capacity of the generated biochar. Fourier transform infrared analysis (FTIR) showed that the main components of the produced gas phase were CO2, CO, CH4 and to a lesser extent volatile organic compounds. In tar, compounds of mainly anthropogenic origin were identified using gas chromatography mass spectrometry (GC-MS). The efficiency of obtaining biochars ranged from 44% to 50%. An increase in the pyrolysis temperature resulted in a decreased amount of biochar produced while improving its physicochemical properties. The biochar obtained at high temperatures showed the good adsorption capacity of Cu2+ (26 mg·g−1) and Zn2+ (21 mg·g−1) cations, which indicates that it can compete with similar sorbents. Adsorption of Cu2+ and Zn2+ proceeded according to the pseudo-second-order kinetic model and the Langmuir isotherm model. The biosorbent obtained from sewage sludge can be successfully used for the separation of metal cations from water and technological wastewater or be the basis for producing modified and mixed carbon sorbents.

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Section: Introductionmentioning

confidence: 99%

Municipal Sewage Sludge as a Source for Obtaining Efficient Biosorbents: Analysis of Pyrolysis Products and Adsorption Tests

et al. 2023

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“…This approach has the potential to significantly reduce the carbon footprint of cement production, a major source of greenhouse gas emissions. Sim et al [2] introduced a carbon sequestration technology that employs concrete slurry water (CSW) generated during concrete production as a new CO 2 sink to lower CO 2 emissions from the cement industry. Their research demonstrated that complete carbonation can be achieved within 10 min at specific CSW ratios (5-25%), with the ability to reduce CO 2 emissions from the cement industry.…”

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confidence: 99%