Chlortetracycline hydrochloride removal by different biochar/Fe composites: A comparative study

Zhao, Nan; Liu, Kunyuan; Yan, Bofang; Zhu, Ling; Zhao, Chun; Gao, Jia; Ruan, Jujun; Zhang, Weihua; Qiu, Rongliang

doi:10.1016/j.jhazmat.2020.123889

Cited by 36 publications

(11 citation statements)

References 45 publications

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“…For the adsorption process, the solution pH is a critical factor that can change the pollutant’s presence and morphology as well as the surface charge of the adsorbent ( Zhao et al, 2020 ). The adsorption rate and adsorption capacity of F ‐ by DA increased with increasing pH, reaching a maximum at a pH of around 6.0 with an adsorption rate of 88.7% and an adsorption capacity of 22.2 mg/g ( Figure 6 ); however, at a pH > 6.0, the adsorption rate and adsorption capacity of F ‐ by DA started to decrease, which can be attributed to the competition between hydroxyl ions and fluoride for active adsorption sites ( Koilraj and Kannan, 2013 ).…”

Section: Resultsmentioning

confidence: 99%

Adsorption Characteristics and Charge Transfer Kinetics of Fluoride in Water by Different Adsorbents

et al. 2022

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Water containing high concentrations of fluoride is widely distributed and seriously harmful, largely because long-term exposure to fluoride exceeding the recommended level will lead to fluorosis of teeth and bones. Therefore, it is imperative to develop cost-effective and environmentally friendly adsorbents to remove fluoride from polluted water sources. In this study, diatomite (DA), calcium bentonite (CB), bamboo charcoal (BC), and rice husk biochar (RHB) were tested as adsorbents to adsorb fluoride (F‐) from water, and this process was characterized by scanning electron microscopy (FEI-SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FT-IR). The effects of pH, dosage, and the initial mass concentration of each treatment solution upon adsorption of F‐ were determined. Kinetic and thermodynamic models were applied to reveal the mechanism of defluoridation, and an orthogonal experiment was designed to obtain the optimal combination of conditions. The results show that the surfaces of CB, BC, and RHB have an irregular pore structure and rough surface, whereas DA has a rich pore structure, clear pores, large specific surface area, and high silica content. With regard to the adsorption process for F‐, DA has an adsorption complex electron interaction; that of CB, BC, and RHB occur mainly via ion exchange with positive and negative charges; and CB on F‐ relies on chemical electron bonding adsorption. The maximum adsorption capacity of DA can reach 32.20 mg/g. When the mass concentration of fluoride is 100 mg/L, the pH value is 6.0 and the dosage is 4.0 g/L; the adsorption rate of F‐ by DA can reach 91.8%. Therefore, we conclude that DA soil could be used as an efficient, inexpensive, and environmentally friendly adsorbent for fluoride removal, perhaps providing an empirical basis for improving the treatment of fluorine-containing water in the future.

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Section: Resultsmentioning

confidence: 99%

Adsorption Characteristics and Charge Transfer Kinetics of Fluoride in Water by Different Adsorbents

et al. 2022

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“…In batch mode operation, variables affecting the removal process such as pH, adsorbent dose, initial concentration of the contaminant, and contact time have also been optimised (El-Azazy et al 2020 ; El-Azazy et al 2021b ; El-Azazy et al 2021c ; Bardestani et al 2019 ; Beakou et al 2017 ; Kalderis et al 2017 ; Lenin Sundar et al 2021 ; Roy et al 2018 ; Turk Sekulic et al 2018 ; Zhao et al 2021d ). Variables such as fixed-bed height, flow rate, the particle size of the biochar adsorbent, pH, and concentration of the inlet solution are optimised in continuous mode operation (Biswas et al 2020 ; Blagojev et al 2019 ; Levio-Raiman et al 2021 ; Sivarajasekar et al 2018 ; Suárez‐Vázquez et al 2021 ).…”

Section: Environmental Remediationmentioning

confidence: 99%

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

et al. 2022

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In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.

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“…Chlortetracycline hydrochloride (CTC) has been widely used for curing infections and promoting animal growth. 1 However, high concentrations of CTC residues can be easily found in water and soil systems due to its extensive uses and flexible mobility, causing potential threats to environmental security and human and animal health. 2 Multifarious techniques have been explored for CTC removal, including adsorption, biological treatment, photocatalytic degradation and so on.…”

Section: Introductionmentioning

confidence: 99%

Luminescent porous metal–organic gels for efficient adsorption and sensitive detection of chlortetracycline hydrochloride assisted by smartphones and a test paper-based analytical device

Liu

Xia

Liu

et al. 2022

Inorg. Chem. Front.

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Chlortetracycline hydrochloride removal by different biochar/Fe composites: A comparative study

Cited by 36 publications

References 45 publications

Adsorption Characteristics and Charge Transfer Kinetics of Fluoride in Water by Different Adsorbents

Adsorption Characteristics and Charge Transfer Kinetics of Fluoride in Water by Different Adsorbents

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Luminescent porous metal–organic gels for efficient adsorption and sensitive detection of chlortetracycline hydrochloride assisted by smartphones and a test paper-based analytical device

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