4.8 Article

Enhanced phenol removal by permanganate with biogas residue biochar: catalytic role of in-situ formation of manganese dioxide and activation of biochar

Related references

Note: Only part of the references are listed.
Article Energy & Fuels

Catalytic conversion of toluene by biochar modified with KMnO4

Xiaoling Jin et al.

Summary: This study investigates the effects of biomass species, modification treatment, experimental time, and atmosphere on the catalytic conversion of toluene by biochar. The results show that oak char modified by KMnO4 has the highest catalytic activity. The addition of water vapor improves the catalytic activity of biochar. Toluene conversion rate and the production of main gases decrease with increasing experimental time.
Review Environmental Sciences

A meta-analysis on the impacts of different oxidation methods on the surface area properties of biochar

Mohammad Ghorbani et al.

Summary: Biochar oxidation methods were meta-analyzed to assess their effects on biochar properties. Acidic oxidation was found to be the most efficient method, significantly increasing the cation exchange capacity, micro-pores, specific surface area, and oxygen-content functional groups of biochar. Increasing pyrolysis temperature above 550 degrees C was crucial for lowering oxygen-content functional groups. Crop residues like rice husk, maize stalk, and rapeseed stem showed promise as feedstocks for biochar synthesis with high surface properties. Overall, acidic oxidation significantly improved the surface properties of biochar when compared to other methods.

LAND DEGRADATION & DEVELOPMENT (2023)

Article Environmental Sciences

A feasible biochar derived from biogas residue and its application in the efficient adsorption of tetracycline from an aqueous solution

Xiaoyu Sheng et al.

Summary: The introduction of citric acid as a modification reagent for biogas residue biochar (CABRC) significantly enhanced its adsorption capacity for TC compared to the unmodified biogas residue biochar (BRC). CABRC exhibited a higher specific surface area and had a 2.8 times higher TC adsorption performance than BRC. The TC adsorption of both BRC and CABRC was primarily controlled by physical and chemical adsorption mechanisms, making CABRC a promising material for wastewater treatment.

ENVIRONMENTAL RESEARCH (2022)

Article Environmental Sciences

The potential of green biochar generated from biogas residue as a heterogeneous persulfate activator and its non-radical degradation pathways: Adsorption and degradation of tetracycline

Quantao Cui et al.

Summary: Metal-free biochar catalyst prepared from pyrolyzed biogas residue showed excellent catalytic activity and adsorption capacity for tetracycline removal in aqueous solutions. The catalyst works predominantly through non-radical pathways with high stability/recyclability and a kinetic reaction rate of 0.03017 min-1. The work provides a simple and effective method for modifying biogas residue waste for versatile applications.

ENVIRONMENTAL RESEARCH (2022)

Review Engineering, Environmental

Permanganate Oxidation of Organic Contaminants and ModelCompounds

Juliana R. Laszakovits et al.

Summary: Permanganate oxidation is a cost-effective and widely reactive environmental remediation strategy. This study investigated the reactivity trends of permanganate with model organic compounds and contaminants, compiling reaction rate constants for 215 compounds. Aromatic rings, alcohols, and ether groups exhibited low reaction rates, while alkene reaction sites had the highest rates.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Green & Sustainable Science & Technology

A delicate method for the synthesis of high-efficiency Hg (II) The adsorbents based on biochar from corn straw biogas residue

Xin Qian et al.

Summary: Biochar prepared from modified agricultural waste biogas residue has a high surface area and abundant micro-mesoporous and layered structure, making it an excellent adsorbent for Hg (II) removal. It shows great potential in treating Hg (II) polluted wastewater.

JOURNAL OF CLEANER PRODUCTION (2022)

Article Engineering, Environmental

Electron shuttle-induced oxidative transformation of arsenite on the surface of goethite and underlying mechanisms

Kai Liu et al.

Summary: Under aerobic conditions, cysteine significantly enhances the oxidation efficiency of As(III) on goethite by inducing Fe(III) reduction and forming Fe(II) species, which play a key role in As(III) oxidation. The oxidation efficiency of As(III) increases with higher cysteine concentration but decreases with elevated pH. O-2(-) radicals account for approximately 80% of total oxidized As(III), while only 16% can be attributed to OH radicals. This study provides new insights into the impact of organic electron shuttling compounds on As cycling in soils.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Engineering, Environmental

Insight into the oxidation of phenolic pollutants by enhanced permanganate with biochar: The role of high-valent manganese intermediate species

Shiqi Tian et al.

Summary: This work demonstrates the enhanced oxidation of phenolic pollutants by permanganate (KMnO4) with the use of commercial biochar. The biochar is characterized by its porous structures, defective sites, and redox-active groups. The presence of biochar significantly improves the degradation efficiency of 4-nitrophenol by KMnO4 and reduces the acute toxicity of the pollutant.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Environmental Sciences

Elemental mercury (Hg0) removal from coal syngas using magnetic tea-biochar: Experimental and theoretical insights

Adnan Raza Altaf et al.

Summary: This study synthesized multiple sorbent materials and improved the Hg-0 removal performance from coal syngas by applying citric acid/ultrasonic treatment. TSCUF0.3 demonstrated the highest Hg-0 capturing performance and the removal mechanism was proposed. The active Hg-0 removal performance was attributed to the valence Fe3O4 and lattice oxygen content on the sorbent surface, as well as the activation by H2S/HCl gases. This work provides a practical approach for utilizing cheap and eco-friendly tea waste to control Hg-0 emission.

JOURNAL OF ENVIRONMENTAL SCIENCES (2022)

Article Energy & Fuels

Catalytic pyrolysis of biogas residues with incineration bottom ash by TG-MS: Kinetics analysis and biochar stability

Wenzhu Wu et al.

Summary: This study investigates the addition of biomass incineration bottom ash (ASH) into the pyrolysis of biogas residues (BR) to enhance the formation of high quality biochar. The kinetics of pyrolysis and carbon sequestration potential of biochar were analyzed. The results show that the addition of ASH inhibits over reactions, increases biochar stability, and improves carbon sequestration potential.
Article Engineering, Environmental

Effect of biochar derived from biogas residue on methane production during dry anaerobic fermentation of kitchen waste

Dongyang Li et al.

Summary: Kitchen wastes have been increasing due to population growth and economic development, and dry anaerobic fermentation is commonly used for their treatment. However, the large amount of biogas residue generated from the process hinders its application. This study investigated the use of biochar prepared from biogas residue to improve the efficiency of dry anaerobic fermentation system. The results showed that biochar significantly reduced the biogas residue and increased the methane yield. Moreover, the presence of biochar accelerated the degradation of volatile fatty acids, enhanced the diversity of bacteria community, and promoted the production of methane through syntrophic acetate oxidation pathway.

WASTE MANAGEMENT (2022)

Article Environmental Sciences

The influencing mechanism of O2, H2O, and CO2 on the H2S removal of food waste digestate-derived biochar with abundant minerals

Dandan Huang et al.

Summary: In this study, the ability of biochar derived from food waste digestate to remove hydrogen sulfide (H2S) was assessed. The study also investigated the influence of gas conditions and moisture content on the removal capacity. The results showed that moisture content had a significant impact on the removal capacity of biochar. Additionally, oxygen content and carbon dioxide also affected the removal capacity to some extent.

BIOCHAR (2022)

Article Engineering, Environmental

Electro-activating persulfate via biochar catalytic cathode for sulfamethazine degradation: Performance and mechanism insight

Yuhui Ge et al.

Summary: This study constructed an electro-catalytic system for degrading sulfamethazine using biochar particle electrodes and biochar catalytic cathodes. The biochar particle electrodes demonstrated remarkable electrocatalytic performance, while the biochar catalytic cathodes improved mass transfer rate and catalytic performance, leading to the complete degradation of sulfamethazine.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Article Environmental Sciences

Biochar-supported nano-scale zerovalent iron activated persulfate for remediation of aromatic hydrocarbon-contaminated soil: an in-situ pilot-scale study

Yu Zeng et al.

Summary: This research developed a convenient method for mass production of nZVI/BC and successfully applied it to the remediation of organic polluted soil on an in-situ pilot scale. The application of nZVI/BC-PS significantly increased the degradation rates of contaminants and inhibited soil enzyme activities, but the inhibitory effects disappeared with prolonged remediation time.

BIOCHAR (2022)

Article Environmental Sciences

Photoactivation of peroxymonosulfate by wood pulp cellulose biochar/g-C3N4 composite for diclofenac degradation: the radical and nonradical pathways

Yu Han et al.

Summary: Metal-free WPBC/g-C3N4 composites were synthesized to effectively activate PMS for the degradation of DCF. The composites demonstrated enhanced visible light absorption, improved charge separation capability, and increased photocatalytic and PMS activation capability. Both radical and nonradical mechanisms were proposed for DCF degradation. The composites exhibited good reusability and a possible degradation pathway for DCF was proposed.

BIOCHAR (2022)

Article Environmental Sciences

p-Arsanilic acid decontamination over a wide pH range using biochar-supported manganese ferrite material as an effective persulfate catalyst: Performances and mechanisms

Bin Yao et al.

Summary: A novel biochar supported MnFe2O4 (MFB) was synthesized and used for the degradation of p-Arsanilic acid (p-ASA) and the simultaneous adsorption of released inorganic arsenic. The MFB/ persulfate (PS) system showed high efficiency in removing arsenic under a wide range of pH values.

BIOCHAR (2022)

Article Environmental Sciences

Biogas residue biochar integrated with phosphate from its ash for the effective recovery of nutrients from piggery biogas slurry

Zifeng Luo et al.

Summary: This study investigated the recovery of NH4+-N and PO43--P from biogas slurry using functionalized biogas residue biochar (BRC) and MAP precipitation. The results showed that oxalic acid-hydrochloric acid mixed acid could leach more than 96% of P in BRC. The final recovery product was a BRC-based slow-release N-P fertilizer rich in struvite. This study provides an innovative technology for the resource utilization of faecal sewage at pig farms.

BIOCHAR (2022)

Article Environmental Sciences

Removal of chlorophenols in the aquatic environment by activation of peroxymonosulfate with nMnOx@Biochar hybrid composites: Performance and mechanism

Tong Liu et al.

Summary: Functional nMnOx@RBC composites were synthesized via a simple co-precipitation method, showing efficient activity in removing chlorophenols. The nanomaterials exhibited superior catalytic and adsorption properties, with singlet oxygen playing a dominant role in the degradation of 4-chloro-3-methyl phenol within the nMnOx@RBC system. This research aims to provide new insights into carbon-metal nanomaterials for the elimination of emerging pollutants.

CHEMOSPHERE (2021)

Article Engineering, Environmental

The overlooked role of carbonaceous supports in enhancing arsenite oxidation and removal by nZVI: Surface area versus electrochemical property

Kai Liu et al.

Summary: Carbonaceous supports such as biochar play a critical role in enhancing the performance of nZVI for heavy metals removal, with a particular focus on their electrochemical properties in As(III) removal. Biochar-supported nZVI with varying surface areas exhibit higher oxidation rate and efficiency in removing As(III) compared to bare nZVI. The electron accepting capacity of biochar is found to be crucial in the oxidation and removal of As(III), with effects varying depending on pyrolysis temperature.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

The mechanism changes during bisphenol A degradation in three iron functionalized biochar/peroxymonosulfate systems: The crucial roles of iron contents and graphitized carbon layers

Kai Li et al.

Summary: Three magnetic biochar nanocomposites were prepared with different catalytic performances for bisphenol A degradation, where C800-3 showed the best performance. The dominant role of electron transfer pathway was gradually replaced by the SO4 center dot- pathway with the increase of iron amount and the destruction of graphitized carbon layers.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Review Engineering, Environmental

Uncertainty and misinterpretation over identification, quantification and transformation of reactive species generated in catalytic oxidation processes: A review

Lingli Wang et al.

Summary: This review clarifies common mistakes and misinterpretations present in the literature regarding the identification of reactive radical species using quenching and electron paramagnetic resonance (EPR) tests. It aims to help researchers avoid errors when investigating catalytic oxidative mechanisms with these tests.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Physical

Engineered carbon supported single iron atom sites and iron clusters from Fe-rich Enteromorpha for Fenton-like reactions via nonradical pathways

Lijng Peng et al.

Summary: Enteromorpha, a seawater pollutant, was converted into a functional carbocatalyst for Fenton-like reactions. The Enteromorpha-derived Fe-N-C exhibited high activity in activating peroxymonosulfate for organic pollutant degradation. Single Fe atoms played a crucial role as dominant reactive sites in forming highly oxidizing Fe-IV=O and Fe-V=O species.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Engineering, Environmental

Persulfate enhanced visible light photocatalytic degradation of iohexol by surface-loaded perylene diimide/acidified biochar

Qiuyi Ji et al.

Summary: A photocatalytic coupling persulfate system was constructed for efficient degradation of Iohexol using a novel binary photocatalyst PB. The active species were identified as holes and hydroxyl radicals, with free radical chain reactions and mutual conversion reactions occurring during the degradation process. Metal-free supramolecular loaded photocatalysts show potential for application in the removal of organic pollutants for water remediation.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Insights into the Electron-Transfer Mechanism of Permanganate Activation by Graphite for Enhanced Oxidation of Sulfamethoxazole

Jiali Peng et al.

Summary: Graphite can facilitate direct electron transfer from organics to KMnO4, leading to high KMnO4 utilization efficiency. The KMnO4/graphite system mainly extracts electrons from organic contaminants via a one-electron pathway, demonstrating superior reusability and significantly improved KMnO4 utilization efficiency.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

One-step synthesis of renewable magnetic tea-biochar derived from waste tea leaves for the removal of Hg0 from coal-syngas

Adnan Raza Altaf et al.

Summary: A regenerable sorbent was developed using waste tea leaves to remove toxic elemental mercury from the environment, showing high adsorption efficiency and excellent regenerability.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Environmental Sciences

Comparison of adsorption behavior studies of Cd2+ by vermicompost biochar and KMnO4-modified vermicompost biochar

Jizhou Zhang et al.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2020)

Article Agricultural Engineering

Preparation of biochar from food waste digestate: Pyrolysis behavior and product properties

Jingxin Liu et al.

BIORESOURCE TECHNOLOGY (2020)

Article Environmental Sciences

Waste-to-resources: Green preparation of magnetic biogas residues-based biochar for effective heavy metal removals

Jingwen Pan et al.

SCIENCE OF THE TOTAL ENVIRONMENT (2020)

Article Engineering, Environmental

Activation of Peroxydisulfate on Carbon Nanotubes: Electron-Transfer Mechanism

Wei Ren et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Article Green & Sustainable Science & Technology

Tackling the issue of food waste in restaurants: Options for measurement method, reduction and behavioral change

Leo Sakaguchi et al.

JOURNAL OF CLEANER PRODUCTION (2018)

Article Engineering, Environmental

Redox-Active Oxygen-Containing Functional Groups in Activated Carbon Facilitate Microbial Reduction of Ferrihydrite

Song Wu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2017)

Article Environmental Sciences

Synthesis of biochar from residues after biogas production with respect to cadmium and nickel removal from wastewater

Aleksandra Bogusz et al.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2017)

Article Engineering, Environmental

Chemical and ecotoxicological evaluation of biochar produced from residues of biogas production

Magdalena Stefaniuk et al.

JOURNAL OF HAZARDOUS MATERIALS (2016)

Article Thermodynamics

Product based evaluation of pyrolysis of food waste and its digestate

Suraj Adebayo Opatokun et al.

ENERGY (2015)

Article Engineering, Environmental

Manipulation of Persistent Free Radicals in Biochar To Activate Persulfate for Contaminant Degradation

Guodong Fang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2015)

Article Chemistry, Analytical

Characterization of biochars produced from residues from biogas production

Magdalena Stefaniuk et al.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2015)

Article Engineering, Environmental

Understanding the Role of Manganese Dioxide in the Oxidation of Phenolic Compounds by Aqueous Permanganate

Jin Jiang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2015)

Article Engineering, Environmental

Role of Ligands in Permanganate Oxidation of Organics

Jin Jiang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2010)

Article Engineering, Environmental

Influence of Different Nominal Molecular Weight Fractions of Humic Acids on Phenol Oxidation by Permanganate

Di He et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2009)

Article Engineering, Environmental

Oxidation of Triclosan by Permanganate (Mn(VII)): Importance of Ligands and In Situ Formed Manganese Oxides

Jin Jiang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2009)

Article Engineering, Environmental

Reactivity and transformation of antibacterial N-oxides in the presence of manganese oxide

HC Zhang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2005)

Article Chemistry, Inorganic & Nuclear

On the structural defects in synthetic γ-MnO2S

LI Hill et al.

JOURNAL OF SOLID STATE CHEMISTRY (2004)