Electro-Fenton oxidation of pesticides with a novel Fe3O4@Fe2O3/activated carbon aerogel cathode: High activity, wide pH range and catalytic mechanism

2012 ◽  
Vol 125 ◽  
pp. 120-127 ◽  
Author(s):  
Hongying Zhao ◽  
Yujing Wang ◽  
Yanbin Wang ◽  
Tongcheng Cao ◽  
Guohua Zhao
Keyword(s):  
Activated Carbon ◽  
High Activity ◽  
Catalytic Mechanism ◽  
Carbon Aerogel ◽  
Fenton Oxidation ◽  
Wide Ph Range ◽  
Ph Range

scholarly journals Three-dimensional electro-Fenton oxidation of N-heterocyclic compounds with a novel catalytic particle electrode: high activity, wide pH range and catalytic mechanism

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15455-15462 ◽  
Author(s):  
Baolin Hou ◽  
Bozhi Ren ◽  
Renjian Deng ◽  
Guocheng Zhu ◽  
Zhenghua Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Activity ◽  
Heterocyclic Compounds ◽  
Catalytic Mechanism ◽  
Three Dimensional ◽  
Fenton Oxidation ◽  
Catalytic Particle ◽  
Wide Ph Range ◽  
Ph Range

A novel three-dimensional (3D) heterogeneous electro-Fenton (EF) system with sludge deserved activated carbon from sewage and iron sludge (SAC-Fe) as catalytic particle electrodes (CPEs) was constructed in this study.

A charcoal-shaped catalyst NiFe2O4/Fe2O3 in electro-Fenton: high activity, wide pH range and catalytic mechanism

2019 ◽  
pp. 1-13 ◽  
Author(s):  
Yanshi Zheng ◽  
Shan Qiu ◽  
Fengxia Deng ◽  
Yingshi Zhu ◽  
Fang Ma ◽  
...  
Keyword(s):  
High Activity ◽  
Catalytic Mechanism ◽  
Wide Ph Range ◽  
Ph Range

scholarly journals Triple activation (thermal-chemical-physical) in the development of an activated carbon from tobacco: characterizations and optimal conditions for Cd2+ and Pb2+ removal from waters

2020 ◽  
Vol 15 (4) ◽  
pp. 877-898 ◽  
Author(s):  
Jéssica Manfrin ◽  
Affonso Celso Gonçalves Jr ◽  
Daniel Schwantes ◽  
César Ricardo Teixeira Tarley ◽  
Andréia da Paz Schiller ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Nonlinear Models ◽  
Carbon Surface ◽  
Heterogeneous Structures ◽  
Wide Ph Range ◽  
Ft Ir ◽  
Linear And Nonlinear ◽  
Ph Range ◽  
Cadmium And Lead

Abstract This research aimed to transform tobacco that originated from smuggled cigarettes into activated carbons, and to study its application in the remediation of water contaminated by cadmium and lead. For this, a triple activation was performed (thermal – chemical H3PO4 – physical CO2), resulting in the studied activated carbon (CT H3PO4 + CO2). The carbon was characterized by its chemical composition, pHPZC, Scanning Electron Microscopy (SEM), FT-IR, Brunauer-Emmett-Teller (BET), and BJH. The influence of the pH of Cd2+ and Pb2+ solutions, and the influence of the adsorbent dose, were studied. Isotherms were constructed by linear and nonlinear models of Langmuir, Freundlich, Sips, Dubinin-Radushkevich, and Temkin. CT H3PO4 + CO2 has carbonates, hydroxyls, carboxylic, and carbonic acids as surface functional groups. The triple activation caused changes in pHPZC (from 5.40 to 9.59). The SEM revealed a carbon surface full of irregular and heterogeneous structures, spongy aspect, with an estimated Specific Surface Area (SSA) increase of 395x and pore volume of 37x. The produced activated carbon has applicability over a wide pH range (3.00–7.00), with an ideal dose estimated at 4 g L−1 for greater efficiency in removing Cd2+ and Pb2. The linear and nonlinear models reveal that metal adsorption is predominantly physical and multi-layered, with a possible reuse in new sorption cycles.

scholarly journals Carbon fibre paper coated by a layered manganese oxide: a nano-structured electrocatalyst for water-oxidation with high activity over a very wide pH range

2019 ◽  
Vol 7 (44) ◽  
pp. 25333-25346 ◽  
Author(s):  
Jens Melder ◽  
Stefan Mebs ◽  
Philipp A. Heizmann ◽  
Rebekka Lang ◽  
Holger Dau ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Manganese Oxide ◽  
High Activity ◽  
Water Oxidation ◽  
Wide Ph Range ◽  
Ph Range ◽  
Coated Carbon ◽  
Layered Manganese Oxide

Manganese oxide coated carbon fibre paper electrodes (MnOx/CFP) exhibit promising water oxidation activities and stabilities for applications in alkaline, neutral and even acidic electrolytes.

Effects of Co-Existing Anions on Fluoride Adsorption onto Magnesia-Amended Activated Carbon

2012 ◽  
Vol 463-464 ◽  
pp. 47-51 ◽  
Author(s):  
Zhi Li He ◽  
Zhan Fei He ◽  
Zhi Xia He ◽  
Yuan Yuan Chen
Keyword(s):  
Activated Carbon ◽  
Modified Activated Carbon ◽  
Fluoride Adsorption ◽  
Wide Ph Range ◽  
Major Anions ◽  
Anions And Cations ◽  
Ph Range ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
The Impact

In this work, the magnesia modified activated carbon (MgO-AC) adsorbent was characterized by scanning electron microscopy (SEM). The effects of co-existing anions on the MgO-AC adsorbent were investigated. The effects of adsorbent dose and solutions pH that influenced the sorption of anions and cations at the solid-liquid interface were also determined. The MgO-AC adsorbent could remove fluoride efficiently over a wide pH range of 5.00-8.00. The impact of major anions on fluoride adsorption followed the order of PO43− >HCO3− >SO42− >Cl− >NO3−.

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