Evaluation of Activated Carbon as a Reactive Cap Sorbent for Sequestration of Polychlorinated Biphenyls in the Presence of Humic Acid

2009 ◽  
Vol 26 (9) ◽  
pp. 1371-1379 ◽  
Author(s):  
Bhawana Sharma ◽  
Kevin H. Gardner ◽  
Jeffrey Melton ◽  
Amy Hawkins ◽  
Gregory Tracey
Keyword(s):  
Activated Carbon ◽  
Humic Acid ◽  
Polychlorinated Biphenyls

Immobilization of Rhodococcus wratislaviensis Strain KT112-7 Сells in Order to Increase Efficiency of Biodegradation of Modified Polychlorinated Biphenyls

2019 ◽  
pp. 58-70
Author(s):  
M.G. Pervova ◽  
T.I. Gorbunova ◽  
V.A. Demakov
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Polychlorinated Biphenyls ◽  
Suspension Culture ◽  
Chemically Modified ◽  
Commercial Mixture ◽  
Immobilized Culture ◽  
Rhodococcus Wratislaviensis ◽  
Academy Of Sciences ◽  
Integrated Program

The degradation of a mixture of hydroxy- and methoxy-PCB obtained as a result of a chemical modification of a commercial mixture of PCB «Sovol» by the Rhodococcus wratislaviensis strain KT112-7 in plankton culture or immobilized on carbon carriers has been investigated. It was established that the KT112-7 strain in plankton culture degraded 73.2% of a mixture of modified PCBs for 96 h; the strain immobilized on BAU-A activated carbon and on Carbopon-B-active carbon fiber provided the 59.5% and 95.3% degradation for the same time, respectively (with the starting concentration of PBS of 0.5 g/L). The application of the R. wratislaviensis KT112-7 strain immobilized on the BAU-A carrier decreased the number of the PCB derivatives by 1.5 times at the end of the experiment; the corresponding result for the Carbopon-B-active-immobilized culture was 3 times; the set of PCBs after the treatment with the suspension culture remained unchanged. In practice, the immobilization of R. wratislaviensis КТ112-7 strain on carbon carriers can be used in the development of the techniques for the degradation of chemically modified PCB mixtures. polychlorinated biphenyls, immobilization, destruction, utilization, PCB, Rhodococcus. Funding-This work was supported by the Integrated Program of the Ural Branch of the Russian Academy of Sciences No. 18-3-8-19. The work was performed using the equipment of the Center for collective use «Spectroscopy and analysis of organic compounds».

Retracted Article: Enhanced adsorption of ionizable aromatic compounds on humic acid-coated carbonaceous adsorbents

RSC Advances ◽  
2012 ◽  
Vol 2 (27) ◽  
pp. 10359-10364 ◽  
Author(s):  
Yubing Sun ◽  
Changlun Chen ◽  
Dadong Shao ◽  
Jiaxing Li ◽  
Xiaoli Tan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Humic Acid ◽  
Aromatic Compounds ◽  
Flake Graphite ◽  
Graphene Oxide Nanosheets ◽  
Multiwalled Carbon ◽  
Retracted Article ◽  
Enhanced Adsorption

Adsorption of ionizable aromatic compounds (IACs) such as 1-naphthylamine and 1-naphthol on Humic acid (HA)-coated graphene oxide nanosheets (GONs), multiwalled carbon nanotubes (MWCNTs), activated carbon (AC), and flake graphite (FG) were investigated by the batch techniques.

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.

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 Adsorption Characteristics of Humic Acids by Granular Activated Carbon

1997 ◽  
Vol 15 (7) ◽  
pp. 507-516 ◽  
Author(s):  
S.H. Lin ◽  
C.M. Lin
Keyword(s):  
Activated Carbon ◽  
Humic Acid ◽  
Surface Diffusion ◽  
Humic Acids ◽  
Granular Activated Carbon ◽  
Model Parameters ◽  
Adsorption System ◽  
Transfer Resistance ◽  
Liquid Phase Mass Transfer ◽  
Continuous Adsorption

The adsorption of humic acids on granular activated carbon has been investigated. A commerically available humic acid and that extracted from the bottom sludge of a dam were employed in the studies. Both batch and continuous adsorption experiments were conducted. A simplified competitive adsorption model in conjunction with the Freundlich isotherm was employed to represent the batch multicomponent adsorption system and a homogeneous surface diffusion model utilized to describe the continuous adsorption system in a packed-bed column. The model parameters were obtained by best fit of the models to the experimental adsorption data. The results indicated that the liquid-phase mass-transfer resistance, surface diffusion coefficient and the amount of adsorption on the activated carbon decreased with increasing molecular weight of the humic acid. It was also found that the adsorption of humic acid on the activated carbon was primarily a surface diffusion-controlled process.

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