scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Influence of feedstocks and modification methods on biochar’s capacity to activate hydrogen peroxide for tetracycline removal

Yaoyao Wang1, Haoran Dong1, Long Li1, Ran Tian1, Jie Chen1, Qin Ning1, Bin Wang1, Lin Tang1, Guangming Zeng1 
01 Nov 2019-Bioresource Technology (Bioresour Technol)-Vol. 291, pp 121840
TL;DR: H2O2 could either enhance or decrease the TC removal by biochar, depending on biochar type, H2O1 concentration and solution pH, but the removal efficiency was still quite low under optimum conditions.
About: This article is published in Bioresource Technology.The article was published on 2019-11-01. It has received 48 citations till now. The article focuses on the topics: Biochar & Pyrolysis.
Citations
More filters
Journal ArticleDOI
TL;DR: A review of biochar and biochar-based catalysts for advanced oxidation processes is presented in this paper, focusing on the mechanisms involved in the activation of hydrogen peroxide, persulfate and peroxymonosulfate as well as its sequence towards degradation process.

104 citations

Journal ArticleDOI
TL;DR: P pinecone biochar was an efficient adsorbent which holds a huge potential for Cd(II) removal from aqueous solution and microstructure characteristics and mechanism analysis suggested that coprecipitation and surface complexation were the main mechanisms of Cd adsorption by biochar.

76 citations

Journal ArticleDOI
TL;DR: In this article, hickory chip biochars developed at distinctive pyrolysis temperatures were ball milled (BMHC) and then post-modified with a 10% hydrogen peroxide (H2O2) solution to obtain a set of novel sorbents.

74 citations

Journal ArticleDOI
TL;DR: A novel adsorbent derived from grapefruit peel (GP) based biochar (GPBC) was synthesized by combined carbonization of GP and subsequent activation by GP extracts, granting GPBC-20 more abundant surface functional groups, which exerts the adsorbents superior performance for tetracycline adsorption.

49 citations

References
More filters
Journal ArticleDOI
01 Jan 1998-Carbon
TL;DR: In this paper, the increasing importance of carbon materials in catalytic processes is analyzed in terms of the most important characteristics of these materials when acting as catalysts or catalyst supports, such as surface area, porosity, chemical inertness and oxygen surface groups.

1,620 citations

Journal ArticleDOI
TL;DR: The high utilization efficiency of H(2)O(2), calculated as 79.2%, showed a promising application of the catalyst in the oxidative degradation of organic pollutants, and the reusability of Fe(3)O (4)/CeO (2) composite was investigated after six successive runs.
Abstract: Magnetic nanoscaled Fe3O4/CeO2 composite was prepared by the impregnation method and characterized as a heterogeneous Fenton-like catalyst for 4-chlorophenol (4-CP) degradation. The catalytic activity was evaluated in view of the effects of various processes, pH value, catalyst addition, hydrogen peroxide (H2O2) concentration, and temperature, and the pseudo-first-order kinetic constant of 0.11 min–1 was obtained for 4-CP degradation at 30 °C and pH 3.0 with 30 mM H2O2, 2.0 g L–1 Fe3O4/CeO2, and 0.78 mM 4-CP. The high utilization efficiency of H2O2, calculated as 79.2%, showed a promising application of the catalyst in the oxidative degradation of organic pollutants. The reusability of Fe3O4/CeO2 composite was also investigated after six successive runs. On the basis of the results of metal leaching, the effects of radical scavengers, intermediates determination, and X-ray photoelectron spectroscopic (XPS) analysis, the dissolution of Fe3O4 facilitated by CeO2 played a significant role, and 4-CP was decom...

913 citations

Journal ArticleDOI
TL;DR: The use of clays and iron-oxide minerals as catalysts of Fenton-like reactions is a promising alternative for the decontamination of soils, groundwaters, sediments, and industrial effluents as discussed by the authors.

758 citations

Journal ArticleDOI
TL;DR: It was found that H2O2 can be effectively activated by biochar, which produces hydroxyl radical ((•)OH) to degrade 2-CB and the activation mechanism was elucidated by electron paramagnetic resonance (EPR) and salicylic acid (SA) trapping techniques.
Abstract: We investigated the activation of hydrogen peroxide (H2O2) by biochars (produced from pine needles, wheat, and maize straw) for 2-chlorobiphenyl (2-CB) degradation in the present study. It was found that H2O2 can be effectively activated by biochar, which produces hydroxyl radical (•OH) to degrade 2-CB. Furthermore, the activation mechanism was elucidated by electron paramagnetic resonance (EPR) and salicylic acid (SA) trapping techniques. The results showed that biochar contains persistent free radicals (PFRs), typically ∼1018 unpaired spins/gram. Higher trapped [•OH] concentrations were observed with larger decreases in PFRs concentration, when H2O2 was added to biochar, indicating that PFRs were the main contributor to the formation of •OH. This hypothesis was supported by the linear correlations between PFRs concentration and trapped [•OH], as well as kobs of 2-CB degradation. The correlation coefficients (R2) were 0.723 and 0.668 for PFRs concentration vs trapped [•OH], and PFRs concentration vs kobs...

524 citations

Journal ArticleDOI
TL;DR: This review provides a critical review of current research updates related to the pollutants interaction with surface functional groups of biochars and the effect of the parameters variability on biochar attributes pertinent to specific pollutants removal, involved mechanisms, and competence for these removals.

497 citations