Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 627, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.127152
Keywords
Biomass; Cobalt oxide nanosheet; PMS; 2; 4-D; Synergic activation
Categories
Funding
- National Natural Science Foundation of China [50578151]
- Beijing Municipal Education Commission School-Enterprise Cooperation Projects [51900265005]
- portable, in car, online monitoring instrument development and demonstration for focusing on prevention and control heavy metals like mercury, chromium, lead, cadmium, arsenic [2012YQ060115]
- National Science and Technology Major Project of China [2015ZX07406005]
- Fundamental Research Funds for the Central Universities [2652016023, 2652013086, 2652013087]
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This study successfully utilized CBC-1 to degrade 2,4-D in water, showing significantly higher efficiency compared to pure Co3O4 and biochar. This provides new insights for the application of carbon-based materials in water treatment.
Carbon-based catalysts have the advantage of biological cleaning and cost-effectiveness in water treatment. This work used a two-step calcination method to prepare a novel nanometer composite material (CBC-1), where flake-like Cobalt oxide (Co3O4) loaded on rice husk biochar. CBC-1 was used to activate PMS and degrade 2,4-dichlorophenoxyacetic acid (2,4-D) in the water phase. SEM, XRD, FT-IR, BET, XPS, EPR and other characterization methods showed that both sulfate radical and hydroxyl radical were involved in 2,4-D degradation. Both the high hydroxyl (-OH) content and Co (II) of the catalyst are beneficial to the activation of PMS. The pseudo-first order reaction rate constant of CBC-1 was 5.3 and 16 times that of pure Co3O4 and biochar. This research provides new ideas for the application of carbon-based materials in the water treatment process and achieves the goals of treating waste water polluted by pesticides effectively and resource utilization of agricultural waste.
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