Activation of persulfate with biochar for degradation of bisphenol A in soil

Liu, Junguang; Jiang, Shaojun; Chen, Dongdong; Dai, Guangling; Wei, Dongyang; Shu, Yuehong

doi:10.1016/j.cej.2019.122637

Cited by 130 publications

(24 citation statements)

References 62 publications

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“…The properties of biochar can be modulated after pyrolysis, thus providing new materials to be used in very different and often not even connected fields. As an example, He et al [137] and Liu et al [138] report a persulfate post pyrolysis treatment of biochars produced at different temperatures. Biochars activate either formation of radical sulfate (• SO 4 − ) or active oxygen (• OH − ) which are the main agents responsible for the degradation of the organic pollutants in biochar treated soils and water.…”

Section: Post-pyrolysis Chemical and Physical Biochar Functionalizationmentioning

confidence: 99%

“…It was pointed out that persulfate activates biochar surface via formation either of radical sulfate (• SO 4 − ) or hydroxyl radical (• OH − ). When the persulfate-activated biochar traps pollutants, a reaction such as that described in Figure 15 for the degradation of bisphenol A, occurs [138]. Namely, this pollutant (also known as 2,2'-bis-(4-hydroxyphenil)propane) is firstly oxidized to 2-(4-hydroxyphenil)-2'- (3,4-dihydroxyphenil)-propane.…”

Section: The Mechanisms Of Entrapment and Decomposition Of Pollutants In Biocharmentioning

confidence: 99%

“…Then a homolytic split occurs, generating hydroxyphenyl and 2-(3,4-dihydroxyphenyl)-propane radicals. Both are subjected to a series of not well-defined oxidations which result in the formation of carbon dioxide and water [138].…”

Section: The Mechanisms Of Entrapment and Decomposition Of Pollutants In Biocharmentioning

confidence: 99%

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Recent Developments in Understanding Biochar’s Physical–Chemistry

et al. 2021

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Biochar is a porous material obtained by biomass thermal degradation in oxygen-starved conditions. It is nowadays applied in many fields. For instance, it is used to synthesize new materials for environmental remediation, catalysis, animal feeding, adsorbent for smells, etc. In the last decades, biochar has been applied also to soils due to its beneficial effects on soil structure, pH, soil organic carbon content, and stability, and, therefore, soil fertility. In addition, this carbonaceous material shows high chemical stability. Once applied to soil it maintains its nature for centuries. Consequently, it can be considered a sink to store atmospheric carbon dioxide in soils, thereby mitigating the effects of global climatic changes. The literature contains plenty of papers dealing with biochar’s environmental effects. However, a discrepancy exists between studies dealing with biochar applications and those dealing with the physical-chemistry behind biochar behavior. On the one hand, the impression is that most of the papers where biochar is tested in soils are based on trial-and-error procedures. Sometimes these give positive results, sometimes not. Consequently, it appears that the scientific world is divided into two factions: either supporters or detractors. On the other hand, studies dealing with biochar’s physical-chemistry do not appear helpful in settling the factions’ problem. This review paper aims at collecting all the information on physical-chemistry of biochar and to use it to explain biochar’s role in different fields of application.

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Section: Post-pyrolysis Chemical and Physical Biochar Functionalizationmentioning

confidence: 99%

Section: The Mechanisms Of Entrapment and Decomposition Of Pollutants In Biocharmentioning

confidence: 99%

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Recent Developments in Understanding Biochar’s Physical–Chemistry

et al. 2021

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“…These results indicate that biochar with a higher pyrolysis temperature has a higher degree of carbonization and a more complete π-conjugated aromatic structure [ 39 ]. Litchi BC morphology and the absorbent capacities have been discussed in the literature [ 38 , 39 , 44 ]: the observed increase in the p-conjugated system, and metal-retention capability. Therefore, this was not considered in the current study.…”

Section: Resultsmentioning

confidence: 99%

“…Litchi branches were collected from an orchard in ZengCheng District, Guangzhou City, Guangdong Province, south China (23°41′ N and 113°81′ E). The BC preparation process followed the method outlined in a previous study [ 38 ]. The BCs obtained under oxygen-limited conditions of different temperatures were named BC300 and BC600, where the suffix number refers to the carbonization temperature.…”

Section: Methodsmentioning

confidence: 99%

Investigating the Aging Effects of Biochar on Soil C and Si Dissolution and the Interactive Impact on Copper Immobilization

Jiang

Duan

et al. 2020

Molecules

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Aging tests were used to investigate the long-term effects of BC on the immobilization of Cu, and the soil silicon dissolution of three types soils (black soil, (BS), vegetable garden soil (VS) and red soil (RS)). Litchi branch biochars (BC) at 10% (w/w) were incubated with three Cu (400 mg/kg) contaminated soils. The effect on soil properties of pH, soil organic carbon (SOC), dissolved organic carbon (DOC) and available silicon content were investigated, along with the speciation distribution of Cu. The results indicated that SOC, DOC, and available silicon content (except, BC300) increased with the application of BCs. On the other hand, the DTPA (diethylenetriaminepentaacetic acid) extractable Cu content in BS, VS and RS soils were reduced by 4–12%, 18–25%, and 12–19%, respectively. The Cu availability in all soils first increased, and then decreased during the aging process. The sum of the other four fractions, including the carbonate fraction and the inert component increased by 4–4.5% (BS), 1.4–2.1% (VS), and 0.5–1% (RS) respectively, over the long-term process. Moreover, during the whole aging process, the soil properties (such as pH, SOC, DOC and available silicon content) were almost stable. This study demonstrates that BCs, especially those produced at a higher temperature, are superior to those been produced at 300 °C in immobilizing Cu and releasing available silicon in soils. However, the remediation efficiencies were restricted by the soil type contamination status and remediation time.

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Photocatalysis: A Sustainable Approach for Removing Hazardous Polyaromatic Hydrocarbons

Elumalai,

Parthipan,

Sivakumar

et al. 2024

ChemistrySelect

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Polycyclic aromatic hydrocarbons (PAHs) are omnipresent toxic pollutants found in numerous ecosystems, including soil, water, and living organisms. Due to their hydrophobic nature, PAHs tend to accumulate in aquatic environments, leading to high concentrations in aquatic sediments and subsequent bioaccumulation in organisms. This accumulation poses substantial risks to humans and aquatic life. Recent advances in photocatalytic methods, particularly those using nanocomposite materials, have shown promising outcomes in the degradation of PAHs. Photocatalysis, a process that uses UV and visible light to accelerate a chemical reaction, is effectively breaking these harmful compounds. This review focuses on the recent advances in the degradation of PAHs, the toxicological effects of PAHs on living organisms, and the mechanisms underlying nanocomposite‐based photocatalysis. The utilization of nanocomposite for photocatalysis is an eco‐friendly substitute to traditional methods for remediating PAH pollution in the ecosystem. This green approach using nanocomposite‐based photocatalysis offers a sustainable and effective approach for the degradation of PAHs.

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Activation of persulfate with biochar for degradation of bisphenol A in soil

Cited by 130 publications

References 62 publications

Recent Developments in Understanding Biochar’s Physical–Chemistry

Recent Developments in Understanding Biochar’s Physical–Chemistry

Investigating the Aging Effects of Biochar on Soil C and Si Dissolution and the Interactive Impact on Copper Immobilization

Photocatalysis: A Sustainable Approach for Removing Hazardous Polyaromatic Hydrocarbons

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