Low‐cost and biodegradable cellulose/PVP/activated carbon composite membrane for brackish water treatment

2019 ◽  
Vol 137 (22) ◽  
pp. 48746 ◽  
Author(s):  
Preethi Ramadoss ◽  
Thankam Regi ◽  
Mohammed Isfahur Rahman ◽  
D. Arivuoli
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Composite Membrane ◽  
Brackish Water ◽  
Low Cost ◽  
Carbon Composite

Forming of Zeolite/Carbon Composite Substrate Coated with Titania for Photocatalyst Decomposition of Organic Compound

2015 ◽  
Vol 659 ◽  
pp. 304-309
Author(s):  
Khemmakorn Gomonsirisuk ◽  
Thanakorn Wasanapiarnpong
Keyword(s):  
Activated Carbon ◽  
Composite Materials ◽  
Low Cost ◽  
Carbon Composite ◽  
Phenolic Resins ◽  
Soaking Time ◽  
Naa Zeolite ◽  
Composite Substrate ◽  
Zeolite Composite ◽  
High Absorption

Organic contaminated wastes water from petrochemical industries can be removed by adsorbent and photocatalyst. In this work, the degradation rate of phenol have been studied at different ratios of activated carbon/NaA zeolite composite materials coated with TiO2 photocatalyst which are easily to be fabricated into tubular shape by extrusion method. In addition, the foam-inserted composite can be floated on the surface of waste water for the higher phocatalyst activity. While the composite is the low cost adsorbent with high absorption and high ion exchange properties. In order to optimize the efficiency of material, the various ratios of activated carbon/NaA zeolite (3:1, 1:1 and 1:3) and amount of coated TiO2 on the specimen’s surface was studied by UV/Vis spectrophotometer which related to phenol concentration. Moreover the various amount of phenolic resins (10, 20, 30, 40 and 50 wt%) at different reduction firing temperatures (600 and 650 °C) with soaking time of 1, 2 and 3 hours affected to the compressive strength of samples. For the characterization, XRD is used to characterize the phase and SEM is used to provide the morphology of the prepared composite materials.

scholarly journals Effect of Media Properties on Performance of Sand Filtration for Drain Water Treatment

2020 ◽  
Author(s):  
Khaled A. I. Ismail ◽  
Sayed I. A. Ismail ◽  
Ahmed S. El-Gendy ◽  
Tarek I. M. Sabry
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Removal Efficiency ◽  
Pilot Plant ◽  
Suspended Solids ◽  
Low Cost ◽  
Infiltration Rate ◽  
Drain Water ◽  
Sand Filter

In an attempt to improve the quality of the agricultural drain in Egypt for its reuse again in the irrigation, low cost solution such as sand filter along with/ without other filtration media have been used in this research, As a result of that, pilot plant of sand filter mixed with other filtration media was tested for its ability to improve the sand performance in removing the suspended solids and organic matters from agricultural drain water of the Belbeis drain (in Sharkia governorate in Egypt). Only sand compared with sand with sponge and sand with Liyan Nanfang activated carbon (L.N.A.C) have been tested to find the optimum mixing sand/ medium ratio &optimum infiltration rate. The work has been done on four runs. It was found that sand mixed with sponge gave the best removal efficiency compared to that of the sand only and the sand mixed with L.N.A.C. The results presented that the concentration of CODt, CODsol and TSS was reduced from 125, 47 and 162 mg/l to 44, 34 and 28 mg/l respectively at optimum infiltration rate of 2 m3/m2/d for sand mixed with sponge.

A TiO2 nanofiber/activated carbon composite as a novel effective electrode material for capacitive deionization of brackish water

RSC Advances ◽  
2014 ◽  
Vol 4 (110) ◽  
pp. 64634-64642 ◽  
Author(s):  
Ahmed G. El-Deen ◽  
Jae-Hwan Choi ◽  
Khalil Abdelrazek Khalil ◽  
Abdulhakim A. Almajid ◽  
Nasser A. M. Barakat
Keyword(s):  
Activated Carbon ◽  
Electrode Material ◽  
Brackish Water ◽  
Carbon Composite ◽  
Schematic Diagram ◽  
Capacitive Deionization ◽  
Tio2 Nanofiber

Schematic diagram of capacitive deionization process.

LiFePO4 - Activated Carbon Composite Electrode as Symmetrical Electrochemical Capacitor in Mild Aqueous Electrolyte

2014 ◽  
Vol 627 ◽  
pp. 3-6 ◽  
Author(s):  
M.Y. Ho ◽  
Poi Sim Khiew ◽  
D. Isa ◽  
T.K. Tan ◽  
W.S. Chiu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Low Cost ◽  
Electrochemical Capacitor ◽  
Carbon Composite ◽  
Electrochemical Performances ◽  
Composite Electrodes ◽  
Capacitive Performance

In this study, a symmetric electrochemical capacitor has been fabricated by adopting the lithiated compound (LiFePO4)-activated carbon (AC) composite as the core electrode materials. The electrochemical performances of the prepared supercapacitor were studied using cyclic voltammetry (CV) in 1.0 M Na2SO3 solution. Experimental results reveal that the maximum specific capacitance of 112.41 F/g is obtained in 40 wt % LiFePO4 loading on AC electrode in comparison to that of pure AC electrode (76.24 F/g) in 1 M Na2SO3. The enhanced capacitive performance of the 40 wt % LiFeO4 –AC composite electrode is believed attributed to the contribution of synergistic effect of electric double layer capacitance (EDLC) on the surface of AC as well as pseudocapacitance via intercalation/extraction of Na+, SO32-and Li+ ions in LiFePO4 lattices. The composite electrodes can sustain a stable capacitive performance at least 1000 cycles with only ~5 % specific capacitance loss after 1000 cycles. Based on the findings above, 40 wt % LiFeO4 –AC composite electrodes which utilise low cost materials and environmental friendly electrolyte is worth being investigated in more details.

Enhanced Fenton-like removal of nitrobenzene via internal microelectrolysis in nano zerovalent iron/activated carbon composite

2015 ◽  
Vol 73 (1) ◽  
pp. 153-160 ◽  
Author(s):  
Sihai Hu ◽  
Yaoguo Wu ◽  
Hairui Yao ◽  
Cong Lu ◽  
Chengjun Zhang
Keyword(s):  
Electron Transfer ◽  
Activated Carbon ◽  
High Efficiency ◽  
Low Cost ◽  
Oxidation Kinetic ◽  
Carbon Composite ◽  
Zerovalent Iron ◽  
Composite Catalyst ◽  
Nano Zerovalent Iron ◽  
Iron Leaching

The efficiency of Fenton-like catalysis using nano zerovalent iron (nZVI) is limited by nZVI aggregation and activity loss due to inactive ferric oxide forming on the nZVI surface, which hinders electron transfer. A novel iron–carbon composite catalyst consisting of nZVI and granular activated carbon (GAC), which can undergo internal iron–carbon microelectrolysis spontaneously, was successfully fabricated by the adsorption–reduction method. The catalyst efficiency was evaluated in nitrobenzene (NB) removal via the Fenton-like process (H2O2-nZVI/GAC). The results showed that nZVI/GAC composite was good for dispersing nZVI on the surface of GAC, which permitted much better removal efficiency (93.0%) than nZVI (31.0%) or GAC (20.0%) alone. Moreover, iron leaching decreased from 1.28 to 0.58 mg/L after reaction of 240 min and the oxidation kinetic of the Fenton-like reaction can be described well by the second-order reaction kinetic model (R2 = 0.988). The composite catalyst showed sustainable catalytic ability and GAC performed as a medium for electron transfer in internal iron–carbon microelectrolysis to promote Fe2+ regeneration and Fe3+/Fe2+ cycles. Therefore, this study represents an important method to design a low cost and high efficiency Fenton-like catalyst in practical application.

High-Performance Mild Annealed CNT/GO-PVA Composite Membrane for Brackish Water Treatment

2021 ◽  
pp. 120361
Author(s):  
Sudesh Yadav ◽  
Ibrar Ibrar ◽  
Ali Altaee ◽  
Akshaya K. Samal ◽  
Elika Karbassiyazdi ◽  
...  
Keyword(s):  
Water Treatment ◽  
Composite Membrane ◽  
Brackish Water ◽  
High Performance

The production of activated carbon for water treatment in malawi from the waste seed husks of Moringa oleifera

1996 ◽  
Vol 34 (11) ◽  
pp. 177-184 ◽  
Author(s):  
A. Michael Warhurst ◽  
Gordon L. McConnachie ◽  
Simon J. T. Pollard
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Moringa Oleifera ◽  
Low Cost ◽  
Bet Surface Area ◽  
High Quality ◽  
Carbon Production ◽  
Commercial Carbon ◽  
Stage Process ◽  
Intended Use

Moringa oleifera is a multi-purpose tree whose seeds can be used as a coagulant in water treatment. The seed husks are currently discarded as a waste, but research has shown that they can be converted into activated carbon by carbonisation at 485°C under N2 for 30 minutes, followed by activation in steam at 850°C for 5 minutes. Here we report an improved method of carbon production, using a single-stage steam pyrolysis activation that is more appropriate for the intended use. Steam pyrolysis at 750°C for between 30 and 120 minutes produced a high quality microporous activated carbon at a yield of between 11% and 17%, with increases in soak time giving improved pore development and more mesoporosity. The apparent N2 BET surface area of the M. oleifera carbon produced by soaking at 750°C for 120 minutes was 730.0 m2 g−1, similar to that of the carbon produced previously by the two-stage process, 734.3 m2 g−1. The phenol adsorptive capacities of the carbons pyrolysed at 750°C were similar to a commercial carbon. These results show that it is possible to produce high quality activated carbon from the waste seed husks of M. oleifera using a simple one-stage 750°C steam pyrolysis. This provides a low-cost method of producing activated carbon locally in developing countries for use in water treatment.

scholarly journals Adsorption Behaviors of a Twin-Tower Hydrogen Purification System Mounted onto Staggered Stainless Steel Sheets Coated with Composite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 169
Author(s):  
Hung-Ta Wu ◽  
Chin-Chun Chung
Keyword(s):  
Stainless Steel ◽  
Activated Carbon ◽  
Composite Membrane ◽  
Molecular Sieves ◽  
Fixed Bed ◽  
Carbon Composite ◽  
Carbon Powder ◽  
Hydrogen Purification ◽  
Operating Variables ◽  
Purification System

Many studies have been conducted on hydrogen production, storage, purification, and transportation. The use of fixed-bed adsorption towers for hydrogen purification is common. The operating variables involved that could affect the adsorption behavior, such as the amount of adsorbents used, the flow rate, and the concentration of the adsorbate, should be discussed further. In addition, the pressure drop caused by the operation of the adsorption tower still needs to be considered. Therefore, the staggered stainless steel sheet coatings with SiO2/MCM41/activated carbon composite membrane were mounted in a twin-tower adsorption system to purify the hydrogen. Similar to the pressure swing adsorption (PSA) system, the amounts of SiO2, activated carbon, and molecular sieves used in the adsorption tower were changed into the amounts of tetraethoxysilane (TEOS), activated carbon powder, and MCM41 powder added to the casting solution. The experimental results showed that the performance of this twin-tower hydrogen purification system would not be increased when one of the target adsorbents was excessive. In addition, the outflow of non-hydrogen components was found to be early when a certain adsorbent was not sufficient. Finally, the recommended switching time for this system was set at an adsorption capacity reaching about 75% saturated capacity.

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