High-efficiency degradation of organic pollutants with Fe, N co-doped biochar catalysts via persulfate activation

Li, Xiang; Jia, Yan; Zhou, Minghua; Su, Xianfa; Sun, Jian

doi:10.1016/j.jhazmat.2020.122764

Cited by 247 publications

(35 citation statements)

References 64 publications

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“…Environmental catalytic materials have been increasingly used for the treatment and control of air − and water pollution. − The discovery and development of environmental catalysts (ECs) often involve various steps including design, synthesis, testing, optimization, and their feedback iteration. , Trial-and-error is a traditional approach used in the EC development that heavily relies on the experience of the EC developers and typically requires a long duration from the development to applications . A large amount of experimental data (even some “unsuccessful” experimental results) have been accumulated during the traditional trial-and-error synthesis processes in the past decades .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Data-Driven, Machine Learning Approach for Identifying Potential Candidates for Environmental Catalysts: From Database Development to Prediction

Chen

Suo

et al. 2021

ACS EST Eng.

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Data-driven, machine learning approaches are increasingly used for the discovery and development of catalytic materials in the area of material science and engineering. In this paper, the approach was evaluated with respect to its applicability in identifying potential environmental catalysts (ECs) using the selective catalytic reduction (SCR) of the air pollutant NO x as an example. The detailed procedures including database assemblage, the training and testing of a machine learning model, the validation and prediction of the model, and model uncertainties are all provided. The results indicated that there is a significant amount of data accumulated in environmental catalysts that can be exploited for accelerating the exploration and optimization of ECs for specific applications. The results also indicated that the approach is powerful for identifying new ECs and optimizing conditions for ECs synthesis and applications. However, the reported data in the literature are often incomplete, which limits the application potentials of the data. With limited data, the simulated results from the model contained uncertainties, especially in the prediction of unknown ECs. Repeated predictions and ensemble averaging were then proposed as an approach to find conditions for synthesizing and applying promising ECs.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a Data-Driven, Machine Learning Approach for Identifying Potential Candidates for Environmental Catalysts: From Database Development to Prediction

Chen

Suo

et al. 2021

ACS EST Eng.

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“…Figure 2 suggests that no significant difference in NCB removal was obtained between nZVI/BC-PS and nZVI/BC anole system. Nevertheless, it should be noted that the oxidation reaction induced by nZVI/BC-PS could degrade the contaminants more thoroughly, which was comparatively superior to the reductive process by zero valent iron ( Li et al, 2020 ). Herein, in the nZVI/BC-PS system, NCB could be reduced by nZVI to chloroaniline, and then oxidized by sulfate radicals to benzoquinone and finally been mineralized as carbon dioxide and water ( Kang et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Rapid Degradation of Nitrochlorobenzene by Activated Persulfate Oxidation With Biochar Supported Nanoscaled Zero Valent Iron

et al. 2021

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Although pesticide intermediates are a kind of typical toxic pollutant in contaminated sites, the remediation of these contaminants in groundwater and soils is of limited concern. In the present study we investigated the performance of a novel heterogeneous oxidation system, biochar supported nanoscaled-zero valent iron (nZVI/BC) activated persulfate (PS), in the oxidative degradation of nitrochlorobenzene (NCB), a typical pesticide intermediate. Peanut shell based nZVI/BC was prepared and used as the PS activator. The degradation kinetics of m-, p-, and o-NCB isomers in the aqueous phase were investigated. The effects of BC/nZVI composition (Fe/BC mass ratio), the amount of BC/nZVI and PS, and initial contaminant concentration on NCB removal were also examined. Results suggest that over 90% removals of three NCB isomers could be obtained by the nZVI/BC activated PS system at initial NCB concentration of 10 mg L−1. The combination of nZVI/BC composite and PS showed superior performance to PS alone. The optimal treatment condition was supposed as the Fe: BC ratio of 1:1, Fe amount of 6 mmol L−1, and the mole ratio of Fe to perfulfate of 1:1.

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“…Recently, in the literature several processes have been reported in which the biochar is used as a catalyst to AOPs or the AOPs are applied to the exhausted biochar regeneration. Thus, Li et al [131] synthesized a Fe, N co-doped wheat straw biochar using urea, and ferrous sulfate as precursors and apply to activate persulfate for organic contaminant degradation (such as acid orange, methyl orange, phenol, bisphenol A and tetracycline hydrochloride). In this line, Mer et al [132] suggested a dual application of biochar as an adsorbent of nickel and lead and subsequent degradation of phenol through in situ generation of hydroxyl radicals.…”

Section: Regeneration Of Biocharmentioning

confidence: 99%

Unravelling the Environmental Application of Biochar as Low-Cost Biosorbent: A Review

et al. 2020

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In this age, a key target for enhancing the competitiveness of the chemical, environmental and biotechnology industries is to manufacture high-value products more efficiently and especially with significantly reduced environmental impact. Under this premise, the conversion of biomass waste to a high-value added product, biochar, is an interesting approach under the circular economy principles. Thus, the improvements in the biochar production and its new and innovative uses are hot points of interest, which are the focus of vast efforts of the scientific community. Biochar has been recognized as a material of great potential, and its use as an adsorbent is becoming a reliable strategy for the removal of pollutants of different streams, according to its high adsorption capacity and potential to eliminate recalcitrant compounds. In this review, a succinct overview of current actions developed to improve the adsorption capability of biochar, mainly of heavy metal and organic pollutants (dyes, pharmaceuticals and personal care products), is summarized and discussed, and the principal adsorption mechanisms are described. The feedstock and the production procedure are revealed as key factors that provide the appropriate physicochemical characteristics for the good performance of biochar as an adsorbent. In addition, the modification of the biochar by the different described approaches proved their feasibility and became a good strategy for the design of selective adsorbents. In the last part of this review, the novel prospects in the regeneration of the biochar are presented in order to achieve a clean technology for alleviating the water pollution challenge.

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High-efficiency degradation of organic pollutants with Fe, N co-doped biochar catalysts via persulfate activation

Cited by 247 publications

References 64 publications

Evaluation of a Data-Driven, Machine Learning Approach for Identifying Potential Candidates for Environmental Catalysts: From Database Development to Prediction

Evaluation of a Data-Driven, Machine Learning Approach for Identifying Potential Candidates for Environmental Catalysts: From Database Development to Prediction

Rapid Degradation of Nitrochlorobenzene by Activated Persulfate Oxidation With Biochar Supported Nanoscaled Zero Valent Iron

Unravelling the Environmental Application of Biochar as Low-Cost Biosorbent: A Review

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