Ethylbenzene and toluene interactions with biochar from municipal solid waste in single and dual systems

Jayawardhana, Yohan; Keerthanan, S.; Lam, Su Shiung; Vithanage, Meththika

doi:10.1016/j.envres.2021.111102

Cited by 20 publications

(4 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Food wastes, for example, which have protein contents reported in the range of 15–23% on a dry mass basis, constitute a substantial fraction of the material deposited in municipal solid waste landfills where anaerobic conditions predominate, , and accumulation of phenylacetic acid has been demonstrated during its degradation in laboratory systems . While the prevalence of toluene and p -cresol in landfill leachates has generally been attributed to disposal of household and industrial chemical wastes such as paint thinners in the case of toluene or wood preservatives in the case of p -cresol, − the results reported here suggest that biological toluene and p -cresol production from anaerobic protein transformation could be an additional source of these pollutants in landfills.…”

Section: Resultsmentioning

confidence: 99%

Biomass Protein Decay Is a Source of Precursors for Microbially Mediated p-Cresol and Toluene Production in Groundwater Undergoing Enhanced Remediation for Treatment of Chlorinated Solvents

2022

View full text Add to dashboard Cite

Bioremediation approaches that involve subsurface injection of fermentable substrates have become common for achieving anaerobic transformation of halogenated alkanes (e.g., 1,2-dichloroethane) and alkenes (e.g., vinyl chloride) to nontoxic final products (e.g., ethene) in groundwater. It was previously reported that subsurface microbial communities could produce toluene as an unintended consequence of subsurface molasses injection. Here, we report a combination of field monitoring data and laboratory studies that demonstrate that subsurface microbial communities can also produce p-cresol (4-methylphenol) as an unintended consequence of enhanced anaerobic bioremediation strategies targeting chlorinated solvents. Following the subsurface injection of agricultural feed-grade cane molasses, p-cresol was observed to transiently accumulate in groundwater sampled from multiple wells, reaching concentrations as high as 63.2 mg/L. Enrichment cultures established with site groundwater consistently produced p-cresol when provided with 4-hydroxyphenylacetic acid. The results from additional experiments with molasses-grown biomass and two casein-derived products with varying aromatic amino acid composition provide compelling evidence that anaerobic transformation of proteins from biomass produced following the addition of a readily fermentable substrate into groundwater can supply a sufficiently large reservoir of aromatic amino acids to account for p-cresol and toluene concentrations observed at the field scale.

show abstract

Section: Resultsmentioning

confidence: 99%

Biomass Protein Decay Is a Source of Precursors for Microbially Mediated p-Cresol and Toluene Production in Groundwater Undergoing Enhanced Remediation for Treatment of Chlorinated Solvents

2022

View full text Add to dashboard Cite

show abstract

“…However, numerous research works have shown that the adsorption of compounds with a benzene ring (e.g., ethylbenzene, toluene, xylene, etc.) on carbon-based materials such as activated carbons, biochars, carbon nanotubes, graphenes, etc., followed the pseudo-second-order model more than the pseudo-first-order model [52][53][54][55]. These results may be due to differences in surface properties of carbonic materials depending on the adsorbent production method.…”

Section: Kinetic Studies For Benzene Adsorptionmentioning

confidence: 95%

Evaluation of Benzene Adsorption onto Grass-Derived Biochar and Comparison of Adsorption Capacity via RSM (Response Surface Methodology)

Na,

Weon,

Lee

et al. 2024

J. Compos. Sci.

View full text Add to dashboard Cite

The present study reports the effective removal of benzene in aqueous phase onto biochar. The adsorption capacity of benzene onto biochars made at different pyrolytic temperatures (e.g., 350, 550, and 750 °C) and from various feedstocks (e.g., grape pomace, rice husk, and Kentucky bluegrass) were investigated. The adsorption capacity of Kentucky bluegrass-derived biochar (KB-BC) prepared at 550 °C for benzene was better than other biochars, owing to the higher surface area and functional groups. The adsorption isotherms and kinetics model for benzene by KB-BC550 fitted the Freundlich and pseudo-first order, respectively. In addition, the results of response surface methodology (RSM) designed with biochar dose, reaction time, and benzene concentration showed the maximum adsorption capacity (ca. 136 mg BZ/g BC) similar to that from kinetic study. KB-BCs obtained as waste grass biomass may be a valuable adsorbent, and RSM may be a useful tool for the investigation of optimal conditions and results.

show abstract

“…Mataji and Khoshandam (2014) This may lead to the highest removal efficiency. Jayawardhana et al (2019) used municipal solid waste to remove benzene from an aqueous solution (30-300 μL À1 ) of different concentrations of benzene used with 1 g L À1 of the municipal biochar showed the highest removal of 40 μ g À1 at pH 9. In the present study, by increasing the adsorbent concentration, % removal also increased as the removal percentage of almond biochar increased with an increase in adsorbent dose 1, 3, and 5 g L À1 62%-84%, 61%-82%, 60%-74% for different adsorbate concentration.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

Dry fruit shell‐derived biochar increases biosorption potential and detoxification of organic pollutants for land safety

Munir,

Hanif,

Abideen

et al. 2023

Land Degrad Dev

View full text Add to dashboard Cite

The increase in water pollution and land degradation ultimately reduces the supply of clean water for the growing population. Biochar produced from dry fruit shells is an effective adsorbent for organic pollutants. It can help reduce soil contamination and water pollution, making it an important option for land safety. For this experiment, dry fruit shell biochar was produced and activated chemically with 1 M KOH to increase the pollutants' removal efficiency. The efficiency of biochar as an adsorber of pollutants was assessed by characterizations of scanning electron microscope, Fourier transform infrared, and X‐ray diffraction (XRD) techniques. The peak of almond shell biochar was observed between 1033 and 1068 cm−1, while in pistachio, it was observed at 1458–1446 cm−1. Data extracted from XRD showed that most peaks were shifted after activation. For example, in walnut shell biochar, the peak shifted from 11° to 18° after biochar activation. The highest pollutant removal efficiency, such as 92%, 90%, and 87%, was observed in walnut shell biochar at 1, 2, and 3 mLL−1 adsorbate concentration, respectively. Pistachio shell biochar was most effective in the presence of the chemical activator to remove toluene and phenol organic contaminants. An increase in adsorbate concentration decreased the removal efficiency from 50% to 46% in activated almond shell biochar, 58% to 55% in activated pistachio shell biochar, and 55% to 54% in activated walnut shell biochar by 1 gL−1 of adsorbent. Kinetic and equilibrium data with different applied models established that the adsorption process was favorable, and models were fitted to the experimental setup. Biochar prepared from different dry fruit shells and their optimum activation can be used as bio‐sorbent for pollutants' removal and hence improved land development for agriculture and other industrial purposes.

show abstract

Ethylbenzene and toluene interactions with biochar from municipal solid waste in single and dual systems

Cited by 20 publications

References 52 publications

Biomass Protein Decay Is a Source of Precursors for Microbially Mediated p-Cresol and Toluene Production in Groundwater Undergoing Enhanced Remediation for Treatment of Chlorinated Solvents

Biomass Protein Decay Is a Source of Precursors for Microbially Mediated p-Cresol and Toluene Production in Groundwater Undergoing Enhanced Remediation for Treatment of Chlorinated Solvents

Evaluation of Benzene Adsorption onto Grass-Derived Biochar and Comparison of Adsorption Capacity via RSM (Response Surface Methodology)

Dry fruit shell‐derived biochar increases biosorption potential and detoxification of organic pollutants for land safety

Contact Info

Product

Resources

About