Removal of humic substances using solar irradiation followed by granular activated carbon adsorption

2010 ◽  
Vol 10 (1) ◽  
pp. 15-22 ◽  
Author(s):  
X. Liu ◽  
C. S. B. Fitzpatrick
Keyword(s):  
Activated Carbon ◽  
Humic Substances ◽  
High Performance ◽  
Granular Activated Carbon ◽  
Size Exclusion ◽  
Solar Irradiation ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Additional Energy ◽  
Gac Adsorption

This study proposed a new method using freely available sunlight and granular activated carbon (GAC) adsorption for enhanced removal of humic substances (HS). Experiments were carried out under natural sunlight conditions in winter and summer. A parabolic solar collector (PC) was applied to concentrate solar energy. HS were characterized by UV254 absorbance, dissolved organic carbon (DOC) concentration and molecular weight (MW). As a result of solar irradiation, decreases of DOC up to 14% in winter and 58% in summer were observed. A comparison of adsorption isotherms and chromatograms of the irradiated and non-irradiated HS confirmed that smaller molecules formed during solar irradiation were preferentially adsorbed by GAC. A dramatic MW change upon solar irradiation was observed in HS irradiation in PC in summer experiment and almost no UV254 detected components were remaining in solution after adsorption (GAC dose 400 mg/L), as measured with high performance size exclusion chromatography (HPSEC). The combined solar irradiation-GAC adsorption method proved to be effective in enhancing HS removal by GAC with no additional energy and chemicals consumption.

A Novel Granular Activated Carbon Adsorption Method for Separation of Levulinic Acid from Formic Acid

2012 ◽  
Vol 550-553 ◽  
pp. 1691-1695 ◽  
Author(s):  
Bao Jian Liu ◽  
Shi Wang Liu ◽  
Tie Bing Liu ◽  
Jian Wei Mao
Keyword(s):  
Activated Carbon ◽  
Formic Acid ◽  
Levulinic Acid ◽  
Granular Activated Carbon ◽  
Packed Bed ◽  
Mixed Solution ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Adsorption Equilibria ◽  
Gac Adsorption

Levulinic acid (LA) is a new versatile platform chemical derived from renewable non-food biomass. A major challenge in the purification of LA from biomass hydrolysate is the separation of LA and formic acid. A novel granular activated carbon (GAC) adsorption and separation of LA and formic acid were investigated in this work. Adsorption equilibria elucidated that LA preferentially adsorbed onto GAC than formic acid. Mixed solution of LA and formic acid was fed into the GAC packed-bed at 30°C, then formic acid was washed out from the column in a pure form with 60°C water and finally LA was effectively eluted with 95% (v/v) ethanol at 60°C. LA can be completely separated from formic acid by this simple GAC adsorption process with good yield and high purity.

scholarly journals Treatment of Radon Rich Bottled Water by Granular Activated Carbon Adsorption Method

2014 ◽  
Vol 04 (01) ◽  
pp. 7-12 ◽  
Author(s):  
Saddig D. Jastaniah ◽  
Bassam Z. Shakhreet ◽  
Hanan Y. Abbas ◽  
Awad M. Elkhadir ◽  
Saeed M. Bafaraj
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Bottled Water ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Carbon Adsorption

Using HPSEC to identify NOM fraction removal and the correlation with disinfection by-product precursors

2015 ◽  
Vol 16 (2) ◽  
pp. 305-313 ◽  
Author(s):  
Euis Nurul Hidayah ◽  
Yung-Chen Chou ◽  
Hsuan-Hsien Yeh
Keyword(s):  
Humic Substances ◽  
Natural Organic Matter ◽  
High Performance ◽  
Haloacetic Acids ◽  
Size Exclusion ◽  
Formation Potential ◽  
Trihalomethane Formation Potential ◽  
Exclusion Chromatography ◽  
Alum Coagulation ◽  
Aliphatic Biopolymer

In this study high performance size exclusion chromatography (HPSEC) was used to compare an ultrafiltration (UF) membrane and alum coagulation for their capacity to remove different fractions of natural organic matter (NOM) from water. At the same time, the removal of disinfection by-product (DBP) precursors, as measured by trihalomethane formation potential (THMFP) and haloacetic acid formation potential (HAAFP), was also detected. The results show that the UF membrane mainly removed the aliphatic biopolymer fraction, while alum coagulation mainly removed the humic substances fraction. The results of DBP precursor analysis show that more THMFP was removed by the UF membrane than HAAFP, while the reverse was true for alum coagulation. It is conjectured that the aliphatic biopolymer fraction is the major precursor for trihalomethanes (THMs), while the humic substances fraction is the major precursor for haloacetic acids (HAAs).

Granular activated carbon (GAC) adsorption in tertiary wastewater treatment: experiments and models

2003 ◽  
Vol 47 (1) ◽  
pp. 113-120 ◽  
Author(s):  
D.S. Chaudhary ◽  
S. Vigneswaran ◽  
V. Jegatheesan ◽  
H.H. Ngo ◽  
H. Moon ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Developed Countries ◽  
Synthetic Wastewater ◽  
Batch Adsorption ◽  
Model Parameters ◽  
Wide Range ◽  
Gac Adsorption

Wastewater treatment has always been a major concern in the developed countries. Over the last few decades, activated carbon adsorption has gained importance as an alternative tertiary wastewater treatment and purification process. In this study, granular activated carbon (GAC) adsorption was evaluated in terms of total organic carbon (TOC) removal from low strength synthetic wastewater. This paper provides details on adsorption experiments conducted on synthetic wastewater to develop suitable adsorption isotherms. Although the inorganics used in the synthetic wastewater solution had an overall unfavourable effect on adsorption of organics, the GAC adsorption system was found to be effective in removing TOC from the wastewater. This study showed that equation of state (EOS) theory was able to fit the adsorption isotherm results more precisely than the most commonly used Freundlich isotherm. Biodegradation of the organics with time was the most crucial and important aspect of the system and it was taken into account in determining the isotherm parameters. Initial organic concentration of the wastewater was the determining factor of the model parameters, and hence the isotherm parameters were determined covering a wide range of initial organic concentrations of the wastewater. As such, the isotherm parameters derived using the EOS theory could predict the batch adsorption and fixed bed adsorption results of the multi-component system successfully. The isotherm parameters showed a significant effect on the determination of the mass transfer coefficients in batch and fixed bed systems.

Granular Activated Carbon Adsorption

2005 ◽  
pp. 573-633 ◽  
Author(s):  
Yung-Tse Hung ◽  
Howard H. Lo ◽  
Lawrence K. Wang ◽  
Jerry R. Taricska ◽  
Kathleen Hung Li
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption

Activated Carbon from Sugarcane (Saccharum officinarum L.) Bagasse for Removal Ca2+ and Mg2+ Ion from Well Water

2020 ◽  
Vol 2 (2) ◽  
pp. 22-32
Author(s):  
Ira Tyas Kurniasari ◽  
Cucun Alep Riyanto ◽  
Yohanes Martono
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
High Hardness ◽  
Saccharum Officinarum ◽  
Well Water ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Impregnation Ratio ◽  
Carbon Adsorption ◽  
Stirring Time

Humans need water with good quality to fulfill their needs. Water with high hardness content will have a bad impact if consumed continuously, so the adsorption method is carried out to reduce the concentration of Ca2+ and Mg2+ ions. The adsorption process uses sugarcane bagasse activated carbon (SBAC) and the tested water sample is well water in District Jati, Kudus. Synthesis of  SBAC was conducted with H3PO4 30% as an activator at an impregnation ratio of 1:5 (w/w) at temperature 700°C. The FTIR result showed that SBAC contains O-H, C-H, C=C, C≡C, and C-O as functional groups. Analysis result with the XRD instrument showed that the microstructure of SBAC that is formed is turbostatic structure and amorphous. Modeling isotherm suitable for SBAC adsorption on Ca2+ ions is Langmuir isotherm where the R2 value is 0.9134 which shows that the adsorption process occurs chemically and monolayer. Modeling isotherm suitable for SBAC adsorption on Mg2+ ions is Elovich isotherm where the R2 value is 0.8638 which means that the adsorption process is multilayer and adsorption in non-ideal conditions. Modeling kinetics suitable for SBAC adsorption on  Ca2+ and Mg2+ ions is Pseudo Orde 2 where the R2 value is 0.9395 and 0.7274. Percent efficiency value of sugarcane activated carbon adsorption of Ca2+ dan Mg2+ ions on District Jati, Kudus well water is 14.44% and 8.94% and 40 minutes stirring time.

Sign in / Sign up

Export Citation Format

Share Document