Migration and transformation of heavy metals in Chinese medicine residues during the process of traditional pyrolysis and solar pyrolysis

Hou, Xiaoting; Deng, Yuying; Dai, Min; Jiang, Xuexia; Li, Shuai; Fu, Hua; Peng, Changsheng

doi:10.1016/j.chemosphere.2022.133658

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…This approach significantly reduced the energy demand from conventional sources, thereby diminishing the carbon footprint of the process [8]. Hou et al (2022) revealed in their comparative study that the solar-powered process not only reduced overall energy consumption and carbon emissions but also yielded biochar with equivalent efficacy in enriching and stabilizing heavy metals in Chinese medicine residues when compared to traditional heating methods [221].…”

Section: Renewable Energy Integrationmentioning

confidence: 99%

Reviewing Air Pollutants Generated during the Pyrolysis of Solid Waste for Biofuel and Biochar Production: Toward Cleaner Production Practices

2024

Sustainability

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The production of biofuels and biochar through pyrolysis is a promising avenue for sustainable energy generation and waste management. However, this process can inadvertently release various air pollutants into the atmosphere, potentially compromising its environmental benefits. This article provides a comprehensive overview of the gas pollutants associated with pyrolysis for biofuel and biochar production, as well as different variables affecting gas emissions. Key pollutants such as particulate matter (PM), volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), carbon monoxide (CO), and nitrogen oxides (NOx) have been discussed in terms of their formations and emissions during pyrolysis processes. Furthermore, major factors influencing pollutant emissions, including feedstock composition, pyrolysis conditions, and combustion technologies have been examined with up-to-date examples. The review highlights the significance of emission control strategies, such as advanced reactor design, catalyst utilization, and the integration of realtime monitoring systems, in mitigating air pollution from pyrolysis processes. By shedding light on the environmental challenges associated with pyrolysis-based biofuel and biochar production, this article aims to encourage the development of cleaner and more sustainable approaches to harness the potential of solid waste conversion technologies.

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Section: Renewable Energy Integrationmentioning

confidence: 99%

Reviewing Air Pollutants Generated during the Pyrolysis of Solid Waste for Biofuel and Biochar Production: Toward Cleaner Production Practices

2024

Sustainability

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“…Biochar is a prominent adsorbent for metals, drug residues, and pollutants [59–66] . However, the adsorption performance of biochar is influenced by the raw materials, pyrolysis temperature, and pyrolysis rate [61–63] .…”

Section: Pyrolysis Of Tcmrmentioning

confidence: 99%

“…Biochar is a prominent adsorbent for metals, drug residues, and pollutants. [59][60][61][62][63][64][65][66] However, the adsorption performance of biochar is influenced by the raw materials, pyrolysis temperature, and pyrolysis rate. [61][62][63] At the same time, TCMR contains a high percentage of lignocellulose, which has the potential to be utilized as a raw material for biochar.…”

Section: Biochar Adsorbentmentioning

confidence: 99%

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Long

Guo

et al. 2023

ChemistrySelect

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Chinese medicine is widely employed in illness prevention and treatment. In recent years, the increased demand for Chinese medicine resources has resulted in a large quantity of waste created during industrialization. However, traditional methods for treating herbal residues, including burning, stacking, and burying, can cause significant environmental damage and resource waste. Furthermore, these application approaches have a low level of resource utilization and a low degree of utilization. Therefore, developing a classification management system is a necessary precondition for reusing Chinese herb residues for medicinal, feed, fertilizer, and energy resource reuse. This paper reviews the potential applications of Chinese herb residues in the extraction of active resources, composting, feed addition, bioethanol preparation, and pyrolysis to biochar, bio‐oil, and fuel gas. Overall, this work provides a foundation for further investigation into the high‐value usage model and resource reuse pathway of Chinese herb residues.

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“…The extensive utilization and widespread application of Chinese herbal medicine (CHM) globally have resulted in the accumulation of substantial residues, making it the most abundant waste at present [28]. It is reported that China generates approximately 70 million tons of CHM residues (CHMRs) annually [29], rendering it one of the most substantial biomass resources. Atropa belladonna L. (ABL), a well-known CHM, possesses high levels of lignin, cellulose, and hemicellulose, which encompass various functional groups, including carboxyl and hydroxyl groups [30].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Li,

Zhao,

Zhang

et al. 2024

Molecules

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One-step carbonization was explored to prepare biochar using the residue of a traditional Chinese herbal medicine, Atropa belladonna L. (ABL), as the raw material. The resulting biochar, known as ABLB4, was evaluated for its potential as a sustainable material for norfloxacin (NOR) adsorption in water. Subsequently, a comprehensive analysis of adsorption isotherms, kinetics, and thermodynamics was conducted through batch adsorption experiments. The maximum calculated NOR adsorption capacity was 252.0 mg/g at 298 K, and the spontaneous and exothermic adsorption of NOR on ABLB4 could be better suited to a pseudo-first-order kinetic model and Langmuir model. The adsorption process observed is influenced by pore diffusion, π–π interaction, electrostatic interaction, and hydrogen bonding between ABLB4 and NOR molecules. Moreover, the utilization of response surface modeling (RSM) facilitated the optimization of the removal efficiency of NOR, yielding a maximum removal rate of 97.4% at a temperature of 304.8 K, an initial concentration of 67.1 mg/L, and a pH of 7.4. Furthermore, the biochar demonstrated favorable economic advantages, with a payback of 852.5 USD/t. More importantly, even after undergoing five cycles, ABLB4 exhibited a consistently high NOR removal rate, indicating its significant potential for application in NOR adsorption.

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Migration and transformation of heavy metals in Chinese medicine residues during the process of traditional pyrolysis and solar pyrolysis

Cited by 11 publications

References 39 publications

Reviewing Air Pollutants Generated during the Pyrolysis of Solid Waste for Biofuel and Biochar Production: Toward Cleaner Production Practices

Reviewing Air Pollutants Generated during the Pyrolysis of Solid Waste for Biofuel and Biochar Production: Toward Cleaner Production Practices

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

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