Equilibrium and kinetic mechanisms of woody biochar on aqueous glyphosate removal

Mayakaduwa, S. S.; Kumarathilaka, Prasanna; Herath, Indika; Ahmad, Mahtab; Al-Wabel, Mohammed I.; Ok, Yong Sik; Usman, Adel R.A.; Abduljabbar, Adel S.; Vithanage, Meththika

doi:10.1016/j.chemosphere.2015.07.080

Cited by 188 publications

(88 citation statements)

References 36 publications

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“…In addition, a band related to the quinoid C=O bond was observed at 1558-1715 cm −1 , while a peak related to the aliphatic chemical structure was seen at 2358 cm −1 [27]. Finally, the band with peaks at 1165 cm −1 and 1429 cm −1 could be ascribed to the C-O/C-O-C surface functional groups and amides (-NH 2 ) in the WB sample ( Figure 2B(b)) [18].…”

Section: Resultsmentioning

confidence: 80%

“…The results showed that biochar can significantly adsorb the heavy metal ions present in contaminated water samples, suggesting that the removal of the heavy metals is primary associated with the sorption properties of biochar. Mayakaduwa et al (2016) achieved a maximum adsorption capacity of 44 mg/g in the case of aqueous glyphosate when using woody biochar at pH values of 5-6; the high adsorption potential could be attributed to the heterogeneous chemisorption interactions between the glyphosate and the phenolic, amine, carboxylic, and phosphate functional groups on the biochar surface [18].…”

Section: Introductionmentioning

confidence: 99%

“…(Figure 5a), with the highest degradation rate for the 6-ring, 5-ring, and 4-ring PAHs being 74%, 75%, and 84%, respectively (Figure 5b). This can probably be ascribed to the increase in the catalyst dose accelerating the decomposition of PS into SO 4 −• radicals because of the presence of the Fe 2+ /Fe 3+ species in a sufficient high amount and the interaction of with the π-electron-rich WB surface via π-π electron donor-acceptor interactions [18,30]. The degradation of the PAHs using the Fe 3 O 4 -WB/PS system was studied at pH values of 3.0-9.0.…”

Section: Catalytic Activity Of Fe 3 O 4 -Wb With Respect To Pah Reducmentioning

confidence: 99%

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Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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Abstract:In this study, we investigated the ability of a magnetic wood biochar (WB)-based composite catalyst (Fe 3 O 4 -WB) to catalyze sodium persulfate (PS) for the remediation of estuary sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). The effects of various critical parameters, including the catalyst dose and initial pH, were investigated. The degradation of the PAHs was found to be related to the number of rings in their structure. The results showed that Fe 3 O 4 -WB is an efficient catalyst for the removal of high-ring PAHs (HPAHs), with the highest degradation rates for the 6-, 5-, and 4-ringed PAHs being 90%, 84%, and 87%, respectively, for a PS concentration of 2 × 10 −5 M, catalyst concentration of 3.33 g/L, and pH of 3.0. That the reduction rate of the HPAHs was greater than that of the low-ring PAHs can be attributed to the strong affinity of the HPAHs for biochar derived from wood biomass. Overall, this study revealed that the WB-mediated electron transfer catalysis of the surface functional groups in a wide range of pH in the Fe 3 O 4 -WB/PS system and potentially application in the remediation of sediments contaminated with PAHs.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Catalytic Activity Of Fe 3 O 4 -Wb With Respect To Pah Reducmentioning

confidence: 99%

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Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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“…), and both Herath et al . and Mayakaduwa et al . observed reduced glyphosate sorption to biochar when pH was increased from 6 to 9.…”

Section: Resultsmentioning

confidence: 89%

“…Kumari et al ., again using birch wood biochar, reported enhanced glyphosate sorption in amended soils and demonstrated the importance of soil physicochemical properties in controlling glyphosate sorption capacity. In addition, biochar has been shown to sorb glyphosate from aqueous solution, and efforts to discern sorption mechanisms based on isotherm models and kinetics data suggest a variety of possible interactions, including π–π electron donor–acceptor interactions, H‐bonding and heterogeneous chemisorption through biochar surface functional groups . While results from these early studies support the potential use of biochar, more information is required before biochar‐based mitigation strategies are adopted.…”

Section: Introductionmentioning

confidence: 99%

Glyphosate sorption/desorption on biochars – interactions of physical and chemical processes

Hall

Spokas

Gámiz

et al. 2017

Pest Management Science

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BACKGROUND Biochar, a carbon‐rich product of biomass pyrolysis, could limit glyphosate transport in soil and remediate contaminated water. The present study investigates the sorption/desorption behavior of glyphosate on biochars prepared from different hardwoods at temperatures ranging from 350 to 900 °C to elucidate fundamental mechanisms. RESULTS Glyphosate (1 mg L−1) sorption on biochars increased with pyrolysis temperature and was highest on 900 °C biochars; however, total sorption was low on a mass basis (<0.1 mg g−1). Sorption varied across feedstock materials, and isotherms indicated concentration dependence. Biochars with a greater fraction of micropores exhibited lower sorption capacities, and specific surface groups were also found to be influential. Prepyrolysis treatments with iron and copper, which complex glyphosate in soils, did not alter biochar sorption capacities. Glyphosate did not desorb from biochar with CaCl2 solution; however, up to 86% of the bound glyphosate was released with a K2HPO4 solution. CONCLUSION Results from this study suggest a combined impact of surface chemistry and physical constraints on glyphosate sorption/desorption on biochar. Based on the observed phosphate‐induced desorption of glyphosate, the addition of P‐fertilizer to biochar‐amended soils can remobilize the herbicide and damage non‐target plants; therefore, improved understanding of this risk is necessary. © 2017 Society of Chemical Industry

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Glyphosate Adsorption from Water Using Hierarchically Porous Metal–Organic Frameworks

Naghdi

Brown

Zendehbad

et al. 2023

Adv Funct Materials

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The selective removal of one ligand in mixed-ligand MOFs upon thermolysis provides a powerful strategy to introduce additional mesopores without affecting the overall MOF structure. By varying the initial ligand ratio, MOFs of the MIL-125-Ti family with two distinct hierarchical pore architectures are synthesized, resembling either large cavities or branching fractures. The performance of the resulting hierarchically porous MOFs is evaluated toward the adsorptive removal of glyphosate (N-(phosphonomethyl)glycine) from water, and the adsorption kinetics and mechanism are examined. Due to their strong affinity for phosphoric groups, the numerous Ti-OH groups resulting from the selective ligand removal act as natural anchor points for effective glyphosate uptake. The relationships between contact duration, glyphosate concentration, and adsorbent dosage are investigated, and the impact of these parameters on the effectiveness of glyphosate removal from contaminated water samples is examined. The introduction of additional mesopores has increased the adsorption capacities by nearly 3 times with record values exceeding 440.9 mg g −1 , which ranks these MOFs among the best-reported adsorbents.

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Equilibrium and kinetic mechanisms of woody biochar on aqueous glyphosate removal

Cited by 188 publications

References 36 publications

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Glyphosate sorption/desorption on biochars – interactions of physical and chemical processes

Glyphosate Adsorption from Water Using Hierarchically Porous Metal–Organic Frameworks

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