Pectin-rich fruit wastes as biosorbents for heavy metal removal: Equilibrium and kinetics

Schiewer, Silke; Patil, Santosh B.

doi:10.1016/j.biortech.2007.03.060

Cited by 242 publications

(138 citation statements)

References 17 publications

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“…The current work indicate the ability of both orange and lemon peels for the removal of heavy metal ions from industrial wastewater as it had been reported for various biosorbent plant materials [8,17,19,20,21] and would successfully be applied for various heavy metals from industrial wastewater since it seems environmentally sound. …”

Section: Bioremoval Of Copper and Lead From Industrial Wastewatersupporting

confidence: 52%

“…This is partially due to the fact that H + ions are strongly competing adsorbents. The pH affects the specification of metal ions and the ionization of surface functional groups [17]. Regarding the temperature influences upon Pb and Cu biosorption, the current study has found that the bioremoval capacity of both orange and lemon peels were affected significantly by temperature (Fig.(2)).…”

Section: A Ph and Temperature Affecting Bioremoval Capacitymentioning

confidence: 64%

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Investigation Biosorption Potential of Copper and Lead from Industrial WasteWater Using Orange and Lemon Peels

Husoon

Al-Azzawi

Al-Hiyaly

2013

JNUS

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Much attention has been made towards adsorbent materials to be used in heavy metal removal from polluted water and various techniques are applied such as chemical, physical and biological techniques. This study was designed for using less expensive and much frequently available materials (orange & lemon peels) to remove copper and lead from industrial waste-water. Three forms of these peels (fresh dried small pieces and powder) were used. Also other factors such as pH and temperature were examined for probable effects on biosorption. Current data show that both orange and lemon peels are capable of removing copper and lead ions at significant capacity. Furthermore, lemon peels had higher capability than orange peels and the form of peel powder of both orange and lemon showed higher capacity than fresh and dried pieces where lemon powder has shown biosorption capacity of 72.5% and 71.3% for lead and copper respectively while orange powder had bioremoval percentage of 56.7% of lead and 34.5% for copper. In case of fresh lemon peels, these figures were 70.9% for lead and 62.2% for copper but fresh orange peels gave much less percentage (48.7of lead and 29.6% of copper). Regarding dried peels which showed the lowest values, but again, lemon peels were significantly better than those of orange. These values of lemon were 58.0% for lead and 57.1% for copper but for orange peels, the biosorption percentages reached 37.2% and 23.7% for lead and copper respectively. However, biosorption capacity of both fruit peels at different forms were significantly affected by various levels of both pH and temperature. The optimum pH and temperature values for better bioremoval capacity for all treatment within this study were 5 and 40 C° for pH and temperature respectively. Based on above, current data found that lemon peels are more efficient than the orange peels as biosorbents materials.

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Section: Bioremoval Of Copper and Lead From Industrial Wastewatersupporting

confidence: 52%

Section: A Ph and Temperature Affecting Bioremoval Capacitymentioning

confidence: 64%

Investigation Biosorption Potential of Copper and Lead from Industrial WasteWater Using Orange and Lemon Peels

Husoon

Al-Azzawi

Al-Hiyaly

2013

JNUS

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“…The Langmuir equation is most often used to described equilibrium sorption isotherm [6], which is valid for monolayer sorption with a finite number of identical sites and is given by The linearized Langmuir isotherm for Cu 2+ adsorbed on the PP and DPP adsorbent was shown in Fig. 4 and Fig.…”

Section: B Effect Of Initial Concentration and Contact Timementioning

confidence: 99%

“…It is described in the linearized version by the following equation [7]. (6) where k 2ad is the rate constant of second order. The linearized pseudo-second -order model gave a good fit with R 2 were 0.99 either for PP and DPP.…”

Section: B Effect Of Initial Concentration and Contact Timementioning

confidence: 99%

Adsorption of Copper Using Pomelo Peel and Depectinated Pomelo Peel

Tasaso¹

2014

JOCET

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Abstract-The removal of Copper (Cu 2+ ) from aqueous solution by adsorption on pomelo peel (PP) and depectinated pomelo peel (DPP) were studied. Factors affected to adsorption; initial pH, initial concentration, contact time and temperature were investigated. It was found that the highest Cu 2+ adsorption capacity for PP and DPP were 19.7 mg/g and 21.1 mg/g at the following conditions; pH = 4 , 125 mg/l of initial concentration , temperature of 25 0 C and equilibrium time about 60 min. Adsorption isotherm of both PP and DPP were well described by the Langmuir model. The kinetic studies showed that a pseudo-second-order rate model was adopted to described the Cu 2+ adsorption. The thermodynamics parameter of the Cu 2+ adsorption were evaluated at temperature of 25, 35 and 45 0 C. The negative of standard free energy change and enthalpy change revealed that the adsorption process is spontaneous and exothermic.

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“…Pektin suda çözünebilir ve biyobozunur bir yapıya sahiptir [3]- [6]. Turunçgillerin kabuğundaki "albedo" denilen beyaz kısım ve elmanın posası ile kabuğu, ticari pektin üretiminde en yaygın olarak kullanılan hammaddelerdir [7], [8]. Portakal kabuğunun albedo kısmı ise %50 oranında pektin içermektedir [4].…”

Section: Introductionunclassified