A comparative study for the sorption of Cd(II) by K-feldspar and sepiolite as soil components, and the recovery of Cd(II) using rhamnolipid biosurfactant

Aşçı, Y.; Nurbas, Macid; Açıkel, Yeşim Sağ

doi:10.1016/j.jenvman.2007.03.006

Cited by 56 publications

(14 citation statements)

References 43 publications

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“…A highest Cd(II) desorption efficiency by rhamnolipid biosurfactant from kaolin was obtained at an initial Cd(II) ion concentration of 0.87 mM (4.42 mmol Cd(II)/kg kaolin) and at a rhamnolipid concentration of 80 mM and found to be 71.9% of the sorbed Cd(II) [23]. A best recovery efficiency from K-feldspar, approximately 96% of the sorbed Cd(II) (1.87 mmol kg −1 ) was achieved by using the rhamnolipid concentrations in the range 50-80 mM [24]. On the other hand, in case of sepiolite, the Cd(II) recovery efficiency remained 10.12% of the sorbed Cd(II) (7.71 mmol kg −1 ) by the 50 mM rhamnolipid solution [24].…”

Section: Effect Of Amount Of Cd(ii) Loaded On To the Soilsmentioning

confidence: 94%

“…A best recovery efficiency from K-feldspar, approximately 96% of the sorbed Cd(II) (1.87 mmol kg −1 ) was achieved by using the rhamnolipid concentrations in the range 50-80 mM [24]. On the other hand, in case of sepiolite, the Cd(II) recovery efficiency remained 10.12% of the sorbed Cd(II) (7.71 mmol kg −1 ) by the 50 mM rhamnolipid solution [24]. In this study, a maximum recovery efficiency of 52.9% of the sorbed Cd(II) using soil A was obtained at a high attainable metal-ion loading of 12.27 mmol (kg soil A) −1 and at the rhamnolipid concentration of 80 mM.…”

Section: Effect Of Amount Of Cd(ii) Loaded On To the Soilsmentioning

confidence: 99%

“…Surface tension will predominately influence sorption that occurs through hydrophobic interactions such as partitioning of non-ionic organic compounds rather than metals. However, it is also postulated that the metals are removed by forming complexes with the biosurfactants on the soil surface, being detached into the soil solution due to the lowering of the interfacial tension, and hence associating with surfactant micelles [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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A comparative study for the sorption of Cd(II) by soils with different clay contents and mineralogy and the recovery of Cd(II) using rhamnolipid biosurfactant

Aşçı

Nurbas

Açıkel

2008

Journal of Hazardous Materials

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Section: Effect Of Amount Of Cd(ii) Loaded On To the Soilsmentioning

confidence: 94%

Section: Effect Of Amount Of Cd(ii) Loaded On To the Soilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A comparative study for the sorption of Cd(II) by soils with different clay contents and mineralogy and the recovery of Cd(II) using rhamnolipid biosurfactant

Aşçı

Nurbas

Açıkel

2008

Journal of Hazardous Materials

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“…Microorganisms producing biosurfactant and and/or biosurfactants can be effectively used for removal of hydrocarbons as well as heavy metals (Sun et al 2006). As biosurfactants are known to enhance bioavailability and carry out biodegradation of hydrophobic compounds, different technologies such as soil washing technology and clean up combined technology employ biosurfactant for effective removal of hydrocarbon and metal, respectively (Pacwa-Plociniczak et al 2011; Liu et al 2010; Partovinia et al 2010; Gottfried et al 2010; Coppotelli et al 2010; Kang et al 2010; Pei et al 2009; Camilios Neto et al 2009; Zhao and Wong 2009; Robles-González 2008; Sheng et al 2008; Santos et al 2008; Aşçi et al 2008; Juwarkar et al 2007; Hickey et al 2007; Shin et al 2006; Mulligan 2005; Kildisas et al 2003; Maier et al 2001). A very important phenomenon of desorption of hydrophobic pollutants tightly bound to soil particles is accelerated by biosurfactants.…”

Section: Introductionmentioning

confidence: 99%

Biosurfactants in agriculture

Sachdev

Cameotra

2013

Appl Microbiol Biotechnol

434

207

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Agricultural productivity to meet growing demands of human population is a matter of great concern for all countries. Use of green compounds to achieve the sustainable agriculture is the present necessity. This review highlights the enormous use of harsh surfactants in agricultural soil and agrochemical industries. Biosurfactants which are reported to be produced by bacteria, yeasts, and fungi can serve as green surfactants. Biosurfactants are considered to be less toxic and eco-friendly and thus several types of biosurfactants have the potential to be commercially produced for extensive applications in pharmaceutical, cosmetics, and food industries. The biosurfactants synthesized by environmental isolates also has promising role in the agricultural industry. Many rhizosphere and plant associated microbes produce biosurfactant; these biomolecules play vital role in motility, signaling, and biofilm formation, indicating that biosurfactant governs plant–microbe interaction. In agriculture, biosurfactants can be used for plant pathogen elimination and for increasing the bioavailability of nutrient for beneficial plant associated microbes. Biosurfactants can widely be applied for improving the agricultural soil quality by soil remediation. These biomolecules can replace the harsh surfactant presently being used in million dollar pesticide industries. Thus, exploring biosurfactants from environmental isolates for investigating their potential role in plant growth promotion and other related agricultural applications warrants details research. Conventional methods are followed for screening the microbial population for production of biosurfactant. However, molecular methods are fewer in reaching biosurfactants from diverse microbial population and there is need to explore novel biosurfactant from uncultured microbes in soil biosphere by using advanced methodologies like functional metagenomics.

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“…Based on the these recent works, natural feldspar (NF) is considered one of the natural inorganic materials that show remarkable potential toward removing of toxic heavy metals from aqueous solutions. For example, high atomic densities Pb, Ni, Cd, Cu and Zn ions have been removed from aqueous solutions (Aşçı et al 2008;Fraga 2005;Liu et al 2007;Wang et al 2006;Pan and Lu 2008).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of ferric ions onto natural feldspar: kinetic modeling and adsorption isotherm

Al-Anber

2013

Int. J. Environ. Sci. Technol.

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The removing of ferric ions (Fe 3? ) from aqueous solution using natural feldspar (NF) has been studied in a batch operation mode. The factors affecting of the sorption equilibrium, such as contact time, initial concentration of the ferric ions (Fe 3? ), feldspar dosage concentration and temperature, were investigated. The maximum removal is 93 % (approx.) using low-level concentration of Fe 3? ions (30 mg L -1 ) and high dosage concentration (40 g L -1 ). The adsorption equilibrium is achieved during the first 90 min. Freundlich model has successfully analyzed the equilibrium of isotherms with R 2 = 1. The adsorption mechanism of aqueous ferric ion on NF follows Freundlich isotherm models (R 2 = 0.997). The capacity (K f ) and intensity (1/n) of Freundlich adsorption are 1.70 and 0.621, respectively. The results reveal that the adsorption mechanism of ferric ion on NF is chemisorptions, heterogeneous multilayer and spontaneous in nature (DG = -19.778 kJ mol -1 ). Adsorption reaction kinetic models, such as pseudo-first order and pseudosecond order, and adsorption diffusion model, such as Weber-Morris intraparticle diffusion model, have been used to describe the adsorption rate and mechanism of the ferric ion onto NF surface. Adsorption of ferric ion on the NF has achieved Lagergren pseudo-second-order model (R 2 = 1.0 approx.) more than Lagergren pseudo-first-order model. The kinetic parameters, rate constant and sorption capacities have been calculated. The new information in this study suggests that NF could be used as a novel filtering materials for removing ferric ions from water.

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A comparative study for the sorption of Cd(II) by K-feldspar and sepiolite as soil components, and the recovery of Cd(II) using rhamnolipid biosurfactant

Cited by 56 publications

References 43 publications

A comparative study for the sorption of Cd(II) by soils with different clay contents and mineralogy and the recovery of Cd(II) using rhamnolipid biosurfactant

A comparative study for the sorption of Cd(II) by soils with different clay contents and mineralogy and the recovery of Cd(II) using rhamnolipid biosurfactant

Biosurfactants in agriculture

Adsorption of ferric ions onto natural feldspar: kinetic modeling and adsorption isotherm

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