Metal Removal from Process Water by Lignin

Lalvani, Shashi B.; Wiltowski, Tomasz; Murphy, D. W.; Lalvani, L.S.

doi:10.1080/09593331808616636

Cited by 66 publications

(48 citation statements)

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“…Intensive studies have therefore been carried out to develop more effective and inexpensive metal adsorbents. Candidate materials include industrial or agricultural waste products such as waste slurry [7,8], fly ash [9,10], lignite [11,12] pine bark [13], peat [14,15], and lignin [16][17][18][19][20][21][22][23][24][25]. Babel and Kurniawan [26] and Bailey et al [27] have reviewed the application of low-cost adsorbents for heavy metal removal from contaminated waters.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the related mechanisms of metal sorption by lignin are still subject to debate. Some studies have found that ion-exchange mechanisms may be responsible for the sorption of metal ions on lignin [17,[21][22][23]. Srivastava et al [16] and Mohan et al [20] suggested that no single mechanism could explain the pro-cess of metal removal by lignin.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of metal ions on lignin

Guo

Zhang

Shan

2008

Journal of Hazardous Materials

644

242

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This study investigated the adsorption of the heavy metal ions Pb(II), Cu(II), Cd(II), Zn(II), and Ni(II) on a lignin isolated from black liquor, a waste product of the paper industry. Lignin has affinity with metal ions in the following order: Pb(II) > Cu(II) > Cd(II) > Zn(II) > Ni(II). The adsorption kinetic data can be described well with a pseudosecond-order model and the equilibrium data can be fitted well to the Langmuir isotherm. Metal ion adsorption was strongly dependent on pH and ionic strength. Surface complexation modelling was performed to elucidate the adsorption mechanism involved. This shows that lignin surfaces contain two main types of acid sites attributed to carboxylic-and phenolic-type surface groups and the phenolic sites have a higher affinity for metal ions than the carboxylic sites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of metal ions on lignin

Guo

Zhang

Shan

2008

Journal of Hazardous Materials

644

242

View full text Add to dashboard Cite

show abstract

“…Hence the study of the sorption behaviour of various natural materials and waste products is nowadays a common research field. Many investigators have studied the feasibility of low-cost materials such as wood bark and sawdust, 1 zeolites, 2,3 clays, 4 peat, 5,6 lignin, 7 agroindustrial wastes, 8,9 fly ash 10 and different types of biomass. 11,12 Bailey et al produced an excellent review of some of these low-cost sorbents.…”

Section: Introductionmentioning

confidence: 99%

Modelling Cd(II) removal from aqueous solutions by adsorption on a highly mineralized peat. Batch and fixed‐bed column experiments

Gabaldón

Marzal

Álvarez‐Hornos

2006

J of Chemical Tech & Biotech

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This paper evaluates the potential use of a locally available organic soil amendment as a low-cost adsorbent. The removal of cadmium from aqueous solutions was studied by means of kinetic, batch and fixed-bed experiments. Batch experiments were conducted to evaluate the process kinetics and the removal equilibrium over a broad pH range. Pseudo-second-order kinetics and Freundlich equilibrium parameters were obtained. Six column experiments were carried out at different flow-rates and feed concentrations. Breakthrough curves showed higher metal retention than expected from the batch adsorption isotherms. Column modelling assuming rate-controlled pore diffusion was successfully performed. The adsorption process was reversed, regenerating the columns by eluting the cadmium using 0.1 mol dm −3 hydrochloric acid. The high retention capacity together with the favourable structural characteristics indicated that this material could be used as an effective and low-cost adsorbent for treatment of wastewaters containing heavy metals.  2006 Society of Chemical IndustryKeywords: cadmium; adsorption; fixed-bed column; Freundlich isotherm; kinetics; peat; intraparticle diffusivity INTRODUCTIONRemoval of heavy metals from aqueous wastes is a challenging task for the appropriate management of wastes. Heavy metals and other metal ions exist as contaminants in the wastewaters of many industries, such as tanning, mining and metal processing. Some metals associated with such activities are Pb, Hg, Cr and Cd. These metals are accumulated in living organisms and produce diseases and disorders.

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“…Many investigators have studied the sorption capacity of low-cost materials such as wood bark [1], peat [2,3], lignin [4], agroindustrial wastes [5,6] and different types of biomass [7,8]. A major part of the literature data relating to the use of low-cost adsorbents for metal removal has been obtained in batch mode.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Posidonia oceanica and organic sediment as biosorbents: Cu removal in fixed bed columns

Álvarez‐Hornos

Gabaldón

Izquierdo

et al. 2008

WIT Transactions on Ecology and the Environment

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In this work, fixed bed column experiments were performed with the aim of evaluating the Cu uptake capacity of two biosorbents. The marine phanerogam Posidonia oceanica, a waste from local beach cleaning practices at Denia (Spain), and locally available organic sediment, a highly mineralized peat from Torreblanca (Spain) were used. Column runs were carried out to determine the sorption isotherm. For this purpose, breakthrough curves up to the exhaustion point were obtained. Maximum uptake capacities were experimentally determined in 56.7 mg·g -1 and 43.3 mg·g -1 for Posidonia oceanica and organic sediment, respectively. High retention capacities indicate that these materials could be used as effective biosorbents for Cu removal. Langmuir equilibrium parameters were obtained for both biosorbents. A mass transport model including convection-dispersion and sorption processes under equilibrium or rate-controlled conditions has been developed to simulate column performance. Good compliance between experimental and modelling results was obtained.

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Metal Removal from Process Water by Lignin

Cited by 66 publications

References 0 publications

Adsorption of metal ions on lignin

Adsorption of metal ions on lignin

Modelling Cd(II) removal from aqueous solutions by adsorption on a highly mineralized peat. Batch and fixed‐bed column experiments

Evaluation of Posidonia oceanica and organic sediment as biosorbents: Cu removal in fixed bed columns

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