Recent Advances in Carbon Dioxide Mineralization to Nano‐size Calcium Carbonate Utilizing Wastewater

Zhang, Ting‐an; Zhao, Hongliang; Liu, Yan; Zhang, Dou; Guozhi, Lv; Zhao, Qiuyue; Li, Yan

doi:10.1002/9781118888735.ch13

Cited by 1 publication

(2 citation statements)

References 4 publications

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“…The results in Figure 3a reveal that within the initial 40 min of reaction, the removal of Pb ions basically fit with a pseudo-first-order kinetics model described in Equation (6). Furthermore, the maximal kinetic constant shown in the inset of Figure 3a was calculated as 1.31 × 10 −1 min −1 under the preferred conditions of 25 • C, and 15 sccm−15 mol% CO 2 .…”

Section: Figure 3a Presents the Variations Of Pb Ions Concentrations ...mentioning

confidence: 63%

“…Presently, the stabilization/solidification of heavy metals (HMs) and the detoxification of dioxin are the main research hotspots for FA treatment. Although alkaline materials can sequestrate CO 2 gas through mineral carbonation of alkaline components [4], excessive alkaline FA is seldom applied to reduce the greenhouse gas CO 2 and acid exhaust gas emission [5,6]. In particular, global CO 2 emissions from coal plants alone have been reported to reach 10.5 Gt in 2021 [7].…”

Section: Introductionmentioning

confidence: 99%

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Remediation of Micro-Pollution in an Alkaline Washing Solution of Fly Ash Using Simulated Exhaust Gas: Parameters and Mechanism

Wang

Tang

et al. 2023

Sustainability

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Currently, there is an urgent need to remediate heavy metals (HMs) and high alkalinity in the washing solution of fly ash (FA). This study investigated the remediation with simulated exhaust gases of two CO2 partial pressure and revealed the removal efficiency of target pollutants, mainly including Pb ions. The results verify that under the preferred conditions of 25 °C and 15 mL/min flow rate, bubbling two kinds of simulated flue gases could efficiently remove 97.9–99.2% of Pb ions. Moreover, the initial 40 min removal of Pb ions fits in a way with a pseudo-first-order equation. Based on the thermodynamic parameters, we infer that the removal of Pb ions was a spontaneous, exothermic, and entropy-decreasing process. Furthermore, residual HMs and terminal pH after remediation of the FA washing solution basically met the regulatory threshold values of the integrated wastewater discharge standard in China (GB 8978−1996). Additionally, the particles obtained from the washing solution of FA were identified as CaCO3, which was mainly composed of vaterite and calcite crystalline. This study provides a fundamental guide for remediating multiple pollutants in the washing solution of FA and simultaneously sequestrating carbon emissions from power plants and industries.

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Section: Figure 3a Presents the Variations Of Pb Ions Concentrations ...mentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Remediation of Micro-Pollution in an Alkaline Washing Solution of Fly Ash Using Simulated Exhaust Gas: Parameters and Mechanism

Wang

Tang

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

Recent Advances in Carbon Dioxide Mineralization to Nano‐size Calcium Carbonate Utilizing Wastewater

Cited by 1 publication

References 4 publications

Remediation of Micro-Pollution in an Alkaline Washing Solution of Fly Ash Using Simulated Exhaust Gas: Parameters and Mechanism

Remediation of Micro-Pollution in an Alkaline Washing Solution of Fly Ash Using Simulated Exhaust Gas: Parameters and Mechanism

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