A study of the factors affecting the removal of humic acid by activated carbon prepared from biomass material

Daifullah, A.A.M.; Girgis, Badie S.; Gad, H.M.H.

doi:10.1016/j.colsurfa.2003.12.020

Cited by 216 publications

(117 citation statements)

References 15 publications

Supporting

Mentioning

102

Contrasting

Unclassified

Order By: Relevance

“…4, the PC uptake increased as the temperature increases, indicating favorable adsorption occurred at higher temperatures. The phenomenon may be due to the acceleration of originally slow adsorption or the creation of some new active sites on the adsorbent surface (Daifullah 2004). Similar results have been reported for the adsorption of Congo red onto Ca-bentonite (Lian 2009) Fig.…”

Section: Effect Of Initial Adsorbate Concentration Contact Time and supporting

confidence: 76%

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Wang

Zheng

Feng³

et al. 2012

ACT

View full text Add to dashboard Cite

The adsorption of polycarboxylate-based superplasticizer onto natural bentonite was investigated in aqueous solution using a batch technique with respect to initial adsorbate concentration, contact time, temperature, pH value and ionic strength. Lower pH value and higher ionic strength were proved to be favorable for the adsorption. The pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to describe the kinetic data and the kinetic constants were also determined. The experimental data fitted the pseudo-second-order model well. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) equations were applied to describe the equilibrium isotherm and the isotherm constants were also evaluated. The langmuir model agreed with the experimental well. Thermodynamic parameters ( Δ G 0 , Δ H 0 and Δ S 0 ) indicated that the adsorption was endothermic and physical in nature.

show abstract

Section: Effect Of Initial Adsorbate Concentration Contact Time and supporting

confidence: 76%

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Wang

Zheng

Feng³

et al. 2012

ACT

View full text Add to dashboard Cite

show abstract

“…The value of K f itself can be used to comparable parameter for sorption capacity of an adsorbent (Daifullah et al 2004).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Humic acid imparts a brown or yellow color in peat water and pose a serious environmental problem, particularly in drinking water treatment because of their taste and odor. They also tend to react with a variety of oxidants and disinfectants used for the purification of drinking water forming carcinogenic disinfection byproducts (DBPs) such as trihalomethanes and haloacetic acids (Daifullah et al 2004;Kamari et al 2009;Ngah et al 2011;Uygunera et al 2007;Sonea et al 2010;Tao et al 2010;Wang et al 2008a;Wang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, there is a need to continue the search and developing alternative adsorbents with high adsorptive capacity and low cost for humic acid removal. As a consequence, numerous low cost materials such as rice husk activated carbon (Daifullah et al 2004), Shorea dasyphylla sawdust (Kamari et al 2009), chitosan (Wang et al 2008a), fly ash (Wang et al 2008b), and other adsorbents (Ngah et al 2011;Sonea et al 2010;Tao et al 2010;Wang et al 2011;García et al 1998;Zhang and Bai 2003;Ngah et al 2008) were used for removal of humic acid. In the present work, the possibility of powdered eggshell to be used as an adsorbent material for removal of humic acid from peat water has been investigated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Zulfikar

Novita²,

Hertadi

et al. 2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The main objective of this study is to investigate the possibility of powdered eggshell used as an adsorbent material for removal of humic acid from peat water. The influences of contact time, dose of eggshells, pH, and temperature were the factors considered in the removal processes of humic acid from peat water. In addition, adsorption isotherms of humic acid onto the powdered eggshell were also evaluated with the Langmuir and Freundlich approximations. Our results showed that the equilibrium of the process was eventually established after 60 min of the contact time, and also found that using 5 g of the powdered eggshell nearly 95 % of humic acid has been successfully removed from the peat water. The removal of humic acid gave better result when it was conducted at low pH, and it was almost unaffected the temperatures variation. The data was well fitted to Freundlich isotherm with the correlation coefficient of not \0.999, and could uptake the humic acid about 126.58 mg/g at pH 4.01, estimated from the Langmuir model. The kinetic experimental data proportionally correlated with the pseudo-second-order kinetic model with a rate constant in the range of 0.016-0.112 g mg -1 min -1 , while intra-particle-diffusion were the main rate determining step in the humic acid removal process. The powdered eggshell investigated in this study, thus, exhibited as a high potential adsorbent for the removal of humic acid from peat water.

show abstract

“…Upon treatment with citric acid, the adsorption capability of coconut copra is greatly improved [6]. The heterogeneous nature of biomass and humic substances has allowed various interactions such as electrostatic linkages, cation bridging, hydrophobic interaction and hydrogen bonding to take place [7][8][9]. Coconut copra is also potentially viable for removal of heavy metals i.e., cadmium, chromium and nickel with encouraging removal efficiency of 85-90 % [10].…”

Section: Introductionmentioning

confidence: 99%

Application of central composite design for optimization of the removal of humic substances using coconut copra

Lee

Krongchai

et al. 2015

Int J Ind Chem

View full text Add to dashboard Cite

Coconut copra is a potential biosorbent for removal of humic substances from peat swamp runoff. In this paper, response surface methodology was applied to evaluate the optimum conditions for removal of humic substances from peat swamp runoff using modified coconut copra. Batch adsorption experiments were conducted according to central composite design. Results show that the quadratic model is best fitted for predicting the removal efficiency with regression coefficients closer to 1 and a lower root mean square error. Dosage is found to have significant influence on the removal efficiency with p \ 0.05. Response surface models further identified the optimum dosage, contact time and temperature at 4.56 g modified coconut copra per 100 mL peat swamp runoff, 42.9 min and 56.8°C/329°K, respectively attaining the maximum removal efficiency of 88.19 %. The predicted removal efficiency was confirmed experimentally under the modelled optimum conditions; the removal efficiency attained (86.54 %) was in good agreement with the predicted value.

show abstract

A study of the factors affecting the removal of humic acid by activated carbon prepared from biomass material

Cited by 216 publications

References 15 publications

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Adsorption of Polycarboxylate-based Superplasticizer onto Natural Bentonite

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Application of central composite design for optimization of the removal of humic substances using coconut copra

Contact Info

Product

Resources

About