Shorea dasyphylla sawdust for humic acid sorption

Kamari, Azlan; Ngah, Wan Saime Wan; Wong, Lindee

doi:10.1007/s00107-009-0336-y

Cited by 18 publications

(26 citation statements)

References 40 publications

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“…The pseudo-first-order rate expression was evaluated with the following equation (Kamari et al 2009;Ngah et al 2011;Tao et al 2010;Wang et al 2011;Zhang and Bai 2003;Bhaumik et al 2012;Elwakeel and Yousif 2010;Rastogi 2008, Gupta et al 2010;Kose and Kivanc 2011;Ehrampoush et al 2011;Chen et al 2010;Ugurlu et al 2005;Okoye et al 2010;Wang et al 2008b;Elkady et al 2011): log ðq e À q t Þ ¼ log q e À k=2:303:t ð6Þ…”

Section: Adsorption Kineticmentioning

confidence: 99%

“…The pseudo-second-order model is based on the assumption that the rate-limiting step may be chemical sorption or chemisorption involving valence forces through sharing or exchange of electrons between sorbent and sorbate. It is assumed that the sorption capacity is proportional to the number of active sites occupied on the sorbent, then the kinetic rate law can be written as follows (Kamari et al 2009;Ngah et al 2011;Tao et al 2010;Wang et al 2011;Zhang and Bai 2003;Bhaumik et al 2012;Elwakeel and Yousif 2010;Gupta and Rastogi 2008;Gupta et al 2010;Kose and Kivanc 2011;Ehrampoush et al 2011;Chen et al 2010;Ugurlu et al 2005;Okoye et al 2010;Wang et al 2008b;Elkady et al 2011):…”

Section: Adsorption Kineticmentioning

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%

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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.

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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.

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Section: Adsorption Kineticmentioning

confidence: 99%

Section: Adsorption Kineticmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

show abstract

“…There were propositions to use them for adsorption of various contaminants, both organic [dyes (Ofomaja and Ho 2008), herbicides (Nanseu-Njiki et al 2010), phenols (Ofomaja and Unuabonah 2011;Ofomaja 2011), humic acids (Kamari et al 2009)] and inorganic, i.e. heavy metal ions (Hansen et al 2010;Ofomaja 2010;Rahman and Islam 2009;Andrabi 2011).…”

Section: Introductionmentioning

confidence: 99%

Application of beech sawdust for removal of heavy metals from water: biosorption and desorption studies

Witek‐Krowiak

2013

Eur. J. Wood Prod.

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Adsorption characteristics of tannic acid onto the novel protonated palygorskite/chitosan resin microspheres

Wu¹,

Chen²

2012

J of Applied Polymer Sci

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Novel protonated palygorskite/chitosan resin microspheres (p-PCRM) were prepared and applied as adsorbents for the removal of tannic acid (TA) from aqueous solution. The effects of palygorskite (PAL) content, the initial pH value of the TA solution, and contact time and temperature on adsorption capacity of the microspheres were investigated. The adsorption process was found to be pH dependant with an optimum activity at pH 8.0. In comparison with protonated chitosan microspheres (224 mg g À1 ), the p-PCRM with 20 wt % PAL content exhibited higher adsorption capacity (455 mg g À1 ) for TA at the same adsorption conditions. This may be attributed to the hydrogen bonding between adsorbents and adsorbates, and the porous structure formed by the introduction of PAL, which were confirmed by Fourier transform infrared and the pore parameters analysis. The study of adsorption kinetics and isotherms showed that the sorption processes were better fitted by pseudo-second-order equation and the Langmuir equation, respectively. Furthermore, the desorption study implied that the p-PCRM were recyclable when 0.1M HCl was used as eluents.

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Shorea dasyphylla sawdust for humic acid sorption

Cited by 18 publications

References 40 publications

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

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

Application of beech sawdust for removal of heavy metals from water: biosorption and desorption studies

Adsorption characteristics of tannic acid onto the novel protonated palygorskite/chitosan resin microspheres

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