scholarly journals The impact of humic acid on metaldehyde adsorption onto powdered activated carbon in aqueous solution

RSC Advances ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Zhuojun Li ◽  
Yuchen Yang ◽  
Ulises Jáuregui-Haza ◽  
Zhengxiao Guo ◽  
Luiza Cintra Campos
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Humic Acid ◽  
Powdered Activated Carbon ◽  
The Impact

Powdered activated carbon with abundant micropores and mesopores can effectively remove metaldehyde from aqueous solution in the presence of humic acid.

scholarly journals TiO2Photocatalyst Nanoparticle Separation: Flocculation in Different Matrices and Use of Powdered Activated Carbon as a Precoat in Low-Cost Fabric Filtration

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Carlos F. Liriano-Jorge ◽  
Ugur Sohmen ◽  
Altan Özkan ◽  
Holger Gulyas ◽  
Ralf Otterpohl
Keyword(s):  
Activated Carbon ◽  
Humic Acid ◽  
Photocatalytic Oxidation ◽  
Low Cost ◽  
Powdered Activated Carbon ◽  
Widespread Application ◽  
Fabric Filter ◽  
Nanoparticle Separation ◽  
Ph Range ◽  
The Impact

Separation of photocatalyst nanoparticles is a problem impeding widespread application of photocatalytic oxidation. As sedimentation of photocatalyst particles is facilitated by their flocculation, the influence of common constituents of biologically pretreated wastewaters (NaCl, NaHCO3, and their combination with humic acid sodium salt) on flocculation was tested by the pipet method. Results showed that the impact of these substances on TiO2nanoparticle flocculation is rather complex and strongly affected by pH. When humic acid was present, TiO2particles did not show efficient flocculation in the neutral and slightly basic pH range. As an alternative to photocatalyst separation by sedimentation, precoat vacuum filtration with powdered activated carbon (PAC) over low-cost spunbond polypropylene fabrics was tested in the presence of two PAC types in aqueous NaCl and NaHCO3solutions as well as in biologically treated greywater and in secondary municipal effluent. PAC concentrations of≥2 g/L were required in order to achieve a retention of nearly 95% of the TiO2nanoparticles on the fabric filter when TiO2concentration was 1 g/L. Composition of the aqueous matrix and PAC type had a slight impact on precoat filtration. PAC precoat filtration represents a potential pretreatment for photocatalyst removal by micro- or ultrafiltration.

Evaluation of refractory organic removal in combined biological powdered activated carbon - microfiltration for advanced wastewater treatment

2001 ◽  
Vol 43 (11) ◽  
pp. 67-74 ◽  
Author(s):  
G. T. Seo ◽  
S. Ohgaki
Keyword(s):  
Activated Carbon ◽  
Humic Acid ◽  
Growth Parameter ◽  
Powdered Activated Carbon ◽  
Sewage Effluent ◽  
Permeate Flux ◽  
Arabic Gum ◽  
Biological Growth ◽  
Toc Removal ◽  
Refractory Organic Matter

Biological powdered activated carbon (BPAC) was incorporated with a microfiltration (MF, 0.2 μm pore size) system to remove the refractory organic matter contained in secondary sewage effluent. A synthetic secondary sewage effluent was used as influent in this study, containing both non-biodegradable organic substances (such as humic acid, lignin sulfonate, tannic acid and arabic gum powder) and biodegradable ones. These refractory organic materials were possibly degraded in contact with microorganisms for 20-27 days. Although humic acid and arabic gum were weakly adsorbed on the activated carbon, they could be effectively removed in the BPAC reactor. The TOC removal at a powdered activated carbon (PAC) concentration of 20 g/L was higher than at 0.5-2 g PAC/L (83% and 66-68%, respectively). The higher removal efficiency was due to the increased rejection at the membrane module in which most of the PAC was accumulated. More than 90% of non-biodegradable compounds removal (detected as E280 , UV absorption at 280 nm) occurred in the BPAC reactor. The biological growth parameter b/Y, used in system design, was estimated to be 0.017 d-1. Relatively high permeate flux of 1.88 m/d could be obtained even at higher PAC concentration of 20 g/L.

Concurrent removal of cadmium and benzene from aqueous solution by powdered activated carbon impregnated alginate beads

CATENA ◽  
2017 ◽  
Vol 148 ◽  
pp. 101-107 ◽  
Author(s):  
Abinashi Sigdel ◽  
Woosik Jung ◽  
Booki Min ◽  
Minsun Lee ◽  
Uikyu Choi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Alginate Beads ◽  
Powdered Activated Carbon

Lead Sorption by Carbon Nanofibers Grown on Powdered Activated Carbon — Kinetics and Equilibrium

NANO ◽  
2015 ◽  
Vol 10 (02) ◽  
pp. 1550017 ◽  
Author(s):  
Abdullah Al Mamun ◽  
Yehya M. Ahmed ◽  
Ma'an Fahmi R. AlKhatib ◽  
Ahmad Tariq Jameel ◽  
Mohammed Abdul Hakeem Abdul Rahman AlSaadi
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Carbon Nanofibers ◽  
Research Work ◽  
Palm Kernel ◽  
Solid Substrate ◽  
Second Order ◽  
Powdered Activated Carbon ◽  
Palm Kernel Shell ◽  
Pseudo Second Order

Carbon nanofibers (CNFs) were synthesized by using a safe and less hazardous method, compared to using floating catalysts in chemical vapor deposition (CVD) process. This process used C 2 H 2 as carbon source and oil palm kernel shell-based powdered activated carbon (PAC) as cheap solid substrate. Use of nickel ( Ni 2+) impregnated PAC as fixed substrate for the synthesis of CNF is one of the novelties of the research work accomplished by the authors. The PAC–CNFs porous nanocomposite product was used for the sorption of lead ions ( Pb 2+) from synthetic aqueous solution. Kinetics of Pb 2+ adsorption and isotherms were investigated by varying initial concentration of lead and contact time. PAC–CNFs were found to remove Pb 2+ better at acidic pH of about 5.5. Langmuir and Freundlich isotherms were applied to the sorption equilibrium data to find the best fitted model. Langmuir isotherm model with R2 = 0.965 fitted the adsorption data better than the Freundlich isotherm. The kinetic processes of Pb 2+ adsorption on CNFs were investigated by applying different kinetic models, namely zero-order, pseudo-first-order and pseudo-second-order. The pseudo-second-order rate equation exhibited the best results with R2 = 0.999, qe = 74.79 (mg/g) and K2 = 0.029 (min ⋅ g/mg). The novel nanocomposite product seemed to have the potential to remove Pb 2+ ions from aqueous solution.

Kinetic Adsorption of Hazardous Methylene Blue from Aqueous Solution onto Iron-Impregnated Powdered Activated Carbon

2019 ◽  
Vol 17 (4) ◽  
pp. 78-86 ◽  
Author(s):  
Athit Phetrak ◽  
◽  
Sirirat Sangkarak ◽  
Sumate Ampawong ◽  
Suda Ittisupornrat ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Powdered Activated Carbon ◽  
Kinetic Adsorption
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