Macroscale preparation of nanosized calcium carbonate by exploiting biogas slurry synchronous metathesis encapsulation method

Pan, Fanghui; Xiao, Han; Huang, Fei; Lei, Juying; Zhu, Hongxiang; Ma, Jinxing

doi:10.1039/d3nj01374j

Cited by 4 publications

(6 citation statements)

References 45 publications

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“…This result illustrates that the CNCC was completely decomposed at this high temperature. Its weight loss was about 5% at 700 • C. This might be because the HA coating material was volatilized above 650 • C. The TCA curve of CNCC was a little different from the previous result of the HA-NCC sample in reference [32], and CaCO 3 was not completely decomposed below 800 • C [2,38]. Figure 4b shows the N 2 adsorption-desorption isotherm of CNCC.…”

Section: Tga and Betmentioning

confidence: 78%

“…The COD concentration declined from 4018 mg/L to 2649 mg/L. This result indicated that 34% of HA participated in the reaction to produce CaCO 3 from biogas slurry [ 32 ]. The solution of CaCl 2 was put into the biogas slurry to cause a double decomposition reaction, forming a crystal nucleus of calcium carbonate (CaCO 3 ).…”

Section: Resultsmentioning

confidence: 99%

“…The hardness (in terms of CaCO 3 ) was 70–220 mg/L, the pH was 8.113~8.327, and the water temperature was 14.1~29.4 °C. The methods used to measure COD, NH 4 + -N, alkalinity, and hardness were as reported in [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…The precipitates of moist HA-NCC were collected through solid–liquid separation. For more detailed preparation of HA-NCC, see reference [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

“…During the test period (1 April 2022 to 14 October 2022), the chemical oxygen demand (COD) of the biogas slurry was 4063~5207 mg/L, the ammoniacal nitrogen (NH 4 + -N) was 2424~3024 mg/L, and the total alkalinity (in terms of CaCO 3 ) of the bicarbonate ions (HCO 3 − ) was 8759~14,264 mg/L. The hardness (in terms of CaCO 3 ) was 70-220 mg/L, the pH was 8.113~8.327, and the water temperature was 14.1~29.4 • C. The methods used to measure COD, NH 4 + -N, alkalinity, and hardness were as reported in [32].…”

Section: Raw Materials and Chemical Reagentsmentioning

confidence: 99%

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Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

et al. 2023

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Nanosized calcium carbonate (NCC) plays a vital role in the rubber and plastic fields as a filler, but it cannot resolve the electrostatic problem. Humic-acid-based NCC (HA-NCC) was accidentally discovered in the reaction between biogas slurry and calcium chloride (CaCl2), based on nutrient recovery and gradient treatment technology to solve the biogas slurry problem. A preliminary study on the preparation of conductive nanosized calcium carbonate (CNCC) from the HA-NCC was implemented. Meanwhile, a synchronous double decomposition coating method was proposed to properly explain the formation of HA-NCC in the biogas slurry. The CNCC was further obtained through drying and carbonizing the HA-NCC sample. The morphology of CNCC was a square shape with aggregation, and its crystals were calcite. The C content of CNCC was 5% higher than that of the normal CaCO3, implying a synchronous coating effect of soluble HA in biogas slurry on NCC. The weight loss of CNCC was about 2.5% at 630 °C, explaining why the HA-NCC remained black at 550 °C for 4 h. The CNCC was partly ordered and graphitized. The resistivity of the CNCC reached 2.62 × 106 Ω·cm. It could be used as a conductive powder. In view of the favorable characteristics described above, CNCC would be expected to be a filler and antistatic agent for plastics and rubbers to enhance the tensile and bending resistance of polymer materials, while eliminating electrostatic hazards. The results are also of great significance for developing high-end products to realize resource utilization of biogas slurry.

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Section: Tga and Betmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The precipitates of moist HA-NCC were collected through solid–liquid separation. For more detailed preparation of HA-NCC, see reference [ 32 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Raw Materials and Chemical Reagentsmentioning

confidence: 99%

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Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

et al. 2023

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Nano‐Calcium Carbonate with Core–Shell Structure was Prepared by Dopamine Chelation Using Pluronic F‐127 as Template

Shu,

Gong,

Zhang

et al. 2024

Part & Part Syst Charact

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Herein, a new template carbonization method is used to prepare calcite‐type nano‐calcium carbonate (CaCO3) with a core–shell structure using calcium hydroxide as a solute and Pluronic F‐127 as a templating and pore‐forming agent. Dopamine hydrochloride is added to control the size of calcium hydroxide particles. The morphology, particle size, and crystal type of CaCO3 are characterized via transmission electron microscopy, X‐ray diffraction, nanoparticle size, and zeta potentiometer. The creation of core–shell calcium carbonate nanoparticles is examined in relation to reaction circumstances (i.e., additive sequence, additive amount, and additive mixing time), carbonization temperature, liquid flow rate, and templates with varying chain lengths. Furthermore, a discussion is held regarding the formation mechanism of spherical core–shell calcium carbonate that is created using the innovative template carbonization method. The results show that the order, amount, liquid flow rate, and template type of additives have a significant effect on the crystal shape of calcium carbonate nanoparticles. The mixing time of additives has a significant effect on the particle size of calcium carbonate nanoparticles. Interestingly, the thickness of the shell depends on the carbonization temperature, and too slow or too fast flow rate will lead to the formation of cyclic calcium carbonate nanoparticles.

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A biotechnological approach for suspended solids removal in biogas slurry via microbially induced calcite precipitation (MICP)

Wang,

Tang,

Pan

et al. 2024

Journal of Cleaner Production

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Macroscale preparation of nanosized calcium carbonate by exploiting biogas slurry synchronous metathesis encapsulation method

Abstract: The excessive biogas slurry produced by anaerobic fermentation seriously constrains the sustainable development of biogas industry. It was significantly important to realize resource utilization of biogas slurry. However, biogas slurry...

Cited by 4 publications

References 45 publications

Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

Nano‐Calcium Carbonate with Core–Shell Structure was Prepared by Dopamine Chelation Using Pluronic F‐127 as Template

A biotechnological approach for suspended solids removal in biogas slurry via microbially induced calcite precipitation (MICP)

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