Utilization of porous carbon synthesized with textile wastes via calcium acetate template for tetracycline removal: The role of template agent and the formation mechanism

Gu, Siyi; Wang, Yongheng; Zhang, Daofang; Xiong, Mengmeng; He, Gu; Xu, Zhaoyi

doi:10.1016/j.chemosphere.2021.133148

Cited by 13 publications

(6 citation statements)

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Section: Chemical Treatmentmentioning

confidence: 99%

“…Another method studied for the reuse of textile waste is the synthesis of porous carbon through pyrolysis [ 108 , 109 , 110 , 111 ]. This method uses an additive: CaCO 3 , calcium acetate [ 111 ], or a natural source of CaCO 3 (such as oyster shells) [ 112 ]. At high temperature, CaCO 3 decomposes to CaO, releasing the CO 2 and helping in the formation of the microporous carbon structure.…”

Section: Chemical Treatmentmentioning

confidence: 99%

“…By applying this method, Gu et al (2022) synthesized porous carbon from a cotton/polyester textile with a high specific surface area (1106.63 m 2 /g), which was tested for the adsorption of tetracycline, a widely used antibiotic, which is a source of water contamination [ 111 ]. The steps involved in the porous carbon formation mechanisms are given in Figure 11 [ 111 , 113 , 114 , 115 ]: 30–300 °C: calcium acetate (CA) is dispersed on the surface of cotton polyester waste, and water contained by CPW is evaporated. 300–600 °C: CPW degradation to furans, sugars, ethylene, and aldehydes.…”

Section: Chemical Treatmentmentioning

confidence: 99%

“… Schematic representation of carbon porous structure formation, at the pyrolysis of a cotton-polyester waste (CPW) in the presence of calcium acetate, reprinted with permission from Ref. [ 111 ]. …”

Section: Figurementioning

confidence: 99%

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Methods for Natural and Synthetic Polymers Recovery from Textile Waste

2022

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Trends in the textile industry show a continuous increase in the production and sale of textile materials, which in turn generates a huge amount of discarded clothing every year. This has a negative impact on the environment, on one side, by consuming resources—some of them non-renewables (to produce synthetic polymers)—and on the other side, by polluting the environment through the emission of GHGs (greenhouse gases), the generation of microplastics, and the release of toxic chemicals in the environment (dyes, chemical reagents, etc.). When natural polymers (e.g., cellulose, protein fibers) are used for the manufacturing of clothes, the negative impact is transferred to soil pollution (e.g., by using pesticides, fertilizers). In addition, for the manufacture of clothes from natural fibers, large amounts of water are consumed for irrigation. According to the European Environment Agency (EEA), the consumption of clothing is expected to increase by 63%, from 62 million tonnes in 2019 to 102 million tonnes in 2030. The current article aims to review the latest technologies that are suitable for better disposal of large quantities of textile waste.

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Section: Chemical Treatmentmentioning

confidence: 99%

Section: Chemical Treatmentmentioning

confidence: 99%

Section: Chemical Treatmentmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Methods for Natural and Synthetic Polymers Recovery from Textile Waste

2022

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“…Fortunately, these problems could be avoided with the application of metallic salts as the template agent because the salts can be easily dissolved and uniformly distributed, forming a homogeneous precursor. Among them, sulphate, [ 33 ] nitrate, [ 34 ] chloride, [ 35 ] and acetate [ 36 ] are extensively employed to improve the uniformity of the pore size. Particularly, acetate is more attractive, which can be ascribed to its high solubility in water and the large number of oxidizing gas by‐products (e.g., H 2 O, CO 2 ) derived from its decomposition.…”

Section: Introductionmentioning

confidence: 99%

Dual‐template synthesis of hierarchical porous carbon and its application in electrical double‐layer capacitors

Yuan

et al. 2022

Can J Chem Eng

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Hierarchical porous carbons (HPCs) with tailored pore structure were fabricated via direct carbonization of a precursor consisting of agar and acetates in an inert atmosphere. The agar served as the carbon source and curing agent, while potassium acetate and calcium acetate were used to create micropores and mesopores, respectively. The morphology and structural features of the HPCs were characterized, and the electrochemical properties were estimated in a three‐electrode system with 6 M KOH as the electrolyte. The resulting HPCs possess a developed pore structure and concentrated pore size distribution (focused at 0.4 and 4 nm), and exhibit typical electrical double‐layer capacitive behaviour. Specially, the HCP‐2 owns a large specific surface area of 1441.65 m2/g and excellent electrochemical properties, including a favourable specific capacitance (235 F/g at 1 A/g), good rate capability (capacitance retention rate of 88.1% at 20 A/g), and impressive long‐term cycling stability (90.6% retention of initial capacitance after 3000 cycles).

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Synthesis of calcium carbonate–loaded mesoporous SBA-15 nanocomposites for removal of phosphate from solution

Tang

Wang

Sun

et al. 2023

Environ Sci Pollut Res

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Removal of phosphate from water is very crucial for protecting the ecological environment since massive phosphorus fertilizers has been widely used and caused serious water deterioration. Thus, we fabricated a series of calcium carbonate loaded mesoporous SBA-15 nanocomposites with different Ca:Si molar ratio (CaAS-x) as phosphorus adsorbents via a simple wet-impregnation method. The multiply approach including XRD, N 2 physisorption, TG-MS and FT-IR were used to characterize the structure, morphology and composition of mesoporous CaAS-x nanocomposites. The phosphate adsorption e ciency of the CaAS-x nanocomposites was studied through adsorption and desorption batch tests. Results showed that the increases of Ca:Si molar ratio (rCa:Si) favored the phosphate removal e ciency of CaAS nanocomposites, especially CaAS with the optimum molar ratio of Ca:Si as 0.55 showed the high adsorption capacity of 92.0 mg•g -1 to high concentration of phosphate (> 200 mg l -1 ). Note that the adsorption capacity of the CaAS-x exponentially fast grew up with increasing the phosphate concentration. Apparently, mesoporous structure of SBA-15 contributed to high disperse of CaCO 3 nanoparticles leading to the multiplayer formation and fast growth of phosphate calcium precipitation. Therefore, mesoporous CaAS-0.55 nanocomposite is an environmental-friendly adsorbent for effective removal of high concentration of phosphate in neutral contaminated wastewater.

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Utilization of porous carbon synthesized with textile wastes via calcium acetate template for tetracycline removal: The role of template agent and the formation mechanism

Cited by 13 publications

References 75 publications

Methods for Natural and Synthetic Polymers Recovery from Textile Waste

Methods for Natural and Synthetic Polymers Recovery from Textile Waste

Dual‐template synthesis of hierarchical porous carbon and its application in electrical double‐layer capacitors

Synthesis of calcium carbonate–loaded mesoporous SBA-15 nanocomposites for removal of phosphate from solution

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