Polymer/biomass-derived biochar for use as a sorbent and electron transfer mediator in environmental applications

Oh, Seok‐Young; Seo, Yong‐Deuk

doi:10.1016/j.biortech.2016.06.073

Cited by 61 publications

(24 citation statements)

References 32 publications

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“…However, the maximum sorption capacity was markedly improved after copyrolysis with polymers, indicating that other mechanisms may exist. Previously, it was shown that the increased sorption capacity of polymer/RS‐derived biochar was due to C residues from the polymer during copyrolysis (Oh and Seo, 2016). According to thermogravimetric analysis results (Supplemental Fig.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the sorption capacity of TNT and RDX can be changed. It has been previously reported that DNT sorption to PP/RS-derived biochar was slightly decreased as the pyrolysis temperature decreased (Oh and Seo, 2016). Obviously, as the temperature increased from 550 to 700 and 900°C, hydrophobic polymer residues could be removed, which could result in a decrease in the sorption capacity of TNT and RDX.…”

Section: Effects Of Pyrolysis Temperaturementioning

confidence: 95%

“…By changing the volumetric ratio of RS and polymers, various types of polymer/RS‐derived biochar were synthesized. The procedure for copyrolysis of RS and polymers has been described in detail elsewhere (Oh and Seo, 2016). In order to determine the effects of pyrolysis temperature, the furnace temperature was set at 550, 700, and 900°C for PP/RS (40:60 v/v)‐derived biochar.…”

Section: Methodsmentioning

confidence: 99%

“…S1). Compared with a control with RS‐derived biochar, polymer/RS‐derived biochars did not show a significant decrease in weight when the temperature increased from 400 to 800°C (Oh and Seo, 2016). The volumetric mixing ratio of RS and polymer before copyrolysis did not significantly affect the sorption capacity of biochar, suggesting that large amounts of polymer can be treated during copyrolysis of polymer and biomass.…”

mentioning

confidence: 98%

“…However, only limited attempts have been made to investigate the possibility of using copyrolyzed biochar for environmental applications. Biochar copyrolyzed with rice ( Oryza sativa L.) straw (RS) and polymer has recently been characterized and investigated as a sorbent for 2,4‐dinitrotoluene (DNT) and Pb removal from solution (Oh and Seo, 2016). Regardless of polymer types, the sorption of DNT and Pb to polymer/RS‐derived biochar was significantly enhanced, which was due to the remaining C residues from polymers, intact and slightly increased surface functional groups, and increasing aromaticity.…”

mentioning

confidence: 99%

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Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Seo

Jeong

et al. 2018

J of Env Quality

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Factors affecting the sorptive removal of nitro explosives (2,4,6-trinitrotoluene [TNT] and hexahydro-1,3,5-trinitro-1,3,5-triazine [RDX]) to polymer/biomass-derived biochar were investigated through batch experiments. Compared with that of rice ( L.) straw (RS)-derived biochar, the sorption of TNT and RDX to polymer/RS-derived biochar was greatly enhanced by>2.5 and 4 times, respectively. The type and amount of polymer did not significantly affect the sorption of nitro explosives to polymer/RS-derived biochar. Pyrolysis temperature did not affect the sorption capacity. Surface treatment with acid or an oxidant did not significantly change the sorption capacity, suggesting that polymer residues may be strongly responsible for the enhancement. Possible polymer residues were identified via gas chromatography mass spectrometry analysis. The toxicity characteristic leaching procedure and Microtox bioassay analyses indicated that polymer/RS-derived biochar did not show possible harmful effects. Our results suggest that polymer/RS-derived biochar can be effectively used as a sorbent to remove nitro explosives both in the natural environment and engineered systems.

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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Pyrolysis Temperaturementioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 98%

mentioning

confidence: 99%

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Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Seo

Jeong

et al. 2018

J of Env Quality

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Upgrading rice husk biochar characteristics through microwave‐assisted phosphoric acid pretreatment followed by co‐pyrolysis with LDPE

Binnal

Kumar

Parameshwaraiah

et al. 2022

Biofuels Bioprod Bioref

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In the present study, an attempt was made to upgrade the characteristics of rice husk biochar through a combination of two strategies: (i) microwave‐assisted phosphoric acid pretreatment (MAPP) of rice husk followed by (ii) co‐pyrolysis of pretreated rice husk with low‐density polyethylene (LDPE). The analysis of pretreated rice husk through biochemical composition, proximate analysis, ultimate analysis, thermogravimetric analysis (TGA), and X‐ray diffraction (XRD) showed that MAPP significantly improved the properties of rice husk. The pretreated rice husk had higher fixed carbon and volatile matter as compared with untreated rice husk (19.65% v/s 13.35% and 66.24% v/s 61.93%) and its ash content was lower than untreated rice husk (9.75% v/s 16.85%). The TGA analysis showed that MAPP improved the thermal stability of rice husk. At 719.65 °C, the residual masses of rice husk and pretreated rice husks were 13.76% and 23.75% respectively. An analysis of properties of biochars revealed that, biochar produced through combined mode had the highest carbon content (86.14%), the least ash content (1.29%), the least H/C and O/C values (0.29 and 0.09), and the highest Brunauer Emmett and Teller (BET) surface area (35.022 m2/g). Raman spectroscopy and XRD results showed that the biochar had a more orderly structure and less structural defects as compared to biochar produced from rice husk alone. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Evaluation of commercial biochar in South Korea for environmental application and carbon sequestration

Shin

Seo

et al. 2020

Env Prog and Sustain Energy

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The performance of commercial wood chip (WC) and biosolid (BS) biochars available in bulk from carbonization processes in South Korea was examined via determination of sorption capacity from batch experiments and evaluation of carbon sequestration using biochar-mortar composites according to construction and environmental properties. Compared with rice straw (RS) biochar synthesized in a laboratory, the sorption capacities of WC and BC biochars are determined by the types of contaminants, the properties of the biochar, and sorption mechanisms. BS and WC biochars are competitive as sorbents for nitro explosives and chlorinated phenols. Characterization of biochar-mortar composites showed that 3-5 wt% biochar inclusion did not significantly change the composites' engineering properties, including flowability, compressive strength, and thermal conductivity. As the biochar content increased in the biochar-mortar composites, the benzene and toluene concentrations in air were accordingly reduced, suggesting that biochar inclusion may be favorable to remove volatile toxic contaminants that cause sick building syndrome. The toxicity characteristics leaching procedure (TCLP) and Micotox ® bioassay tests showed that biocharmortar composites were not toxic. These results suggest that BS and WC biochars in South Korea are competitive as sorbents for some organic contaminants and that biochar-mortar composites may be environmentally friendly carbon-sequestering construction materials.

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Polymer/biomass-derived biochar for use as a sorbent and electron transfer mediator in environmental applications

Cited by 61 publications

References 32 publications

Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Sorption of Nitro Explosives to Polymer/Biomass‐Derived Biochar

Upgrading rice husk biochar characteristics through microwave‐assisted phosphoric acid pretreatment followed by co‐pyrolysis with LDPE

Evaluation of commercial biochar in South Korea for environmental application and carbon sequestration

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