Effect of pyrolysis temperature on polycyclic aromatic hydrocarbons toxicity and sorption behaviour of biochars prepared by pyrolysis of paper mill effluent treatment plant sludge
Abstract
The polycyclic aromatic hydrocarbons (PAHs) toxicity and sorption behaviour of biochars prepared from pyrolysis of paper mill effluent treatment plant (ETP) sludge in temperature range 200-700 °C was studied. The sorption behaviour was found to depend on the degree of carbonization where the fractions of carbonized and uncarbonized organic content in the biochar act as an adsorption media and partition media, respectively. The sorption and partition fractions were quantified by isotherm separation method and isotherm parameters were correlated with biochar properties (aromaticity, polarity, surface area, pore volume and ash content). The risk assessment for the 16 priority EPA PAHs present in the biochar matrix was performed and it was found that the concentrations of the PAHs in the biochar were within the permissible limits prescribed by US EPA (except BC400 and BC500 for high molecular weight PAHs).
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The lower sulfur and hydrogen contents can be ascribed to volatilization of organic sulfur and breaking of some hydrogen bonds during dehydration during microwave irradiation.
“This can be ascribed to the volatilization of organic sulfur content (Zhang et al. 2015), and some of the hydrogen bonds were broken during the dehydration process during microwave irradiation (Devi and Saroha 2015a).”
From Lignin-impregnated biochar assisted with microwave irradiation for CO2 capture: adsorption performance and mechanism (2024) · cites this paper as Devi and Saroha 2015a
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Impact of biochar properties on soil conditions and agricultural sustainability: A review
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“As reported, the physical adsorption activation energy is less than 4.184 kJ mol − 1 , while it ranges 40–800 kJ mol − 1 for pure chemical adsorption (Devi and Saroha 2015b; Huang et al. 2015).”
InfluentialHung, C.-M., Chen, C.-W., Huang, C.-P., Yang, Y.-Y., & Dong, C.-D. (2022) · Bioresource Technology · doi:10.1016/j.biortech.2022.127246 · Cited by 35 · see citing works
- Authors
- Devi, P., & Saroha, A. K.
- Affiliations
- Indian Institute of Technology Delhi (IN)
- Corresponding author
- Saroha, Anil K.
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2015-09
- Volume
- 192
- Pages
- 312-320
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W386528453
- Cited by
- 186
- References
- 1
- Citations by year
- 2026: 17 · 2025: 17 · 2024: 24 · 2023: 21 · 2022: 19 · 2021: 16 · 2020: 23 · 2019: 15 · 2018: 8 · 2017: 16 · 2016: 9 · 2015: 1
- FWCI
- 7.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Keywords
- polycyclic aromatic hydrocarbons, biochar, pyrolysis temperature, sorption, partitioning, adsorption isotherms, biochar properties, aromaticity, surface area, pore volume, ash content, risk assessment, high molecular weight PAHs, wastewater sludge valorization
- MeSH terms
- Carbon, Carcinogens, Charcoal, Industrial Waste, Gas Chromatography-Mass Spectrometry, Paper, Pentachlorophenol, Polycyclic Aromatic Hydrocarbons, Sewage, Surface Properties, Temperature, Waste Disposal, Fluid, Water Pollutants, Chemical, Porosity, Risk Assessment
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