Modeling the effect of pH on biosorption of heavy metals by citrus peels

Schiewer, Silke; Patil, Santosh B.

doi:10.1016/j.jhazmat.2007.12.076

Cited by 121 publications

(54 citation statements)

References 25 publications

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“…While the deep peaks between 1300 -1000 cm -1 indicate the C-O stretching of -COOH. The results were in agreement with FTIR analysis done onto Cucumis melo peels [15], mango peels [16] and citrus peels [17] as shown in Table 1. Stretching vibration of ionic carboxylic groups 1300 -1000 C-O stretching of COOH Cucumis melo rind [15] 3500 -3200 Bonded hydroxyl groups (-OH) and (-NH) groups 3000 -2850 C-H stretching, -CH, -CH 2 , -CH 3 1750-1680 C=O carbonyl groups 1640-1500…”

Section: Iscee 2016supporting

confidence: 88%

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A Chemical and Morphological Study of Cassava Peel: A Potential Waste as Coagulant Aid

et al. 2017

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Abstract. This study investigates the chemical and morphological characteristics of cassava peel (CP) biomass as a potential coagulant aid for turbidity, heavy metals and microbial removal. FE-SEM micrograph shown the surface of the CP samples was covered with smooth and globular in shaped of bound starch granules. FTIR spectra demonstrated that carboxyl and hydroxyl groups were present in abundance. Whereas analysis by XRF spectrometry indicated the CP samples contain Fe 2 O 3 and Al 2 O 3 which might contribute to its coagulation ability. The features of CP obtained from this study promotes the feasibility of CP to be further developed and studied to produce effective coagulant aid as sustainable alternative to reduce the usage of chemical coagulants.

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Section: Iscee 2016supporting

confidence: 88%

“…Carboxylate and carboxyl groups 1300-1000 -C-O or -C-N bonds Mango peel [16] 3500 -3200 Bonded hydroxyl groups (-OH) and (-NH) groups 3000 -2850 C-H stretching, -CH, -CH 2 , -CH 3 1750-1680 C=O carbonyl groups 1300-1000 -C-O or -C-N bonds Citrus peel [17] 3000 -2850 C-H stretching, -CH, -CH 2 , -CH 3 1750-1680 C=O carbonyl groups 1640-1500…”

Section: Iscee 2016mentioning

confidence: 99%

A Chemical and Morphological Study of Cassava Peel: A Potential Waste as Coagulant Aid

et al. 2017

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“…That is why searches for still new, more effective methods, cheaper materials for sorbents production, i.e., of biological origin (Witek-Krowiak and Reddy 2013), commonly occurring or from industrial wastes, are undertaken. Many various waste materials are tested, such as: fragmented coconut shells (Amuda et al 2007), fruit rinds (Schiewer and Patil 2008), lignocellulosic materials (Reddy et al 2012) or animal waste (An et al 2001). Extremely low prices of those sorbents and possibility of their regeneration make the biosorption process economically profitable and highly competitive to other methods of metals removal from water.…”

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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“…In the study with natural polysaccharides, pH of solution should be taken to account. This is an important parameter because the sorption system is strongly pHdependent due to the properties of both alginate compounds changing their charge and potential at different pH and the solution composition, i.e., metal ion speciation (Lofgren et al 2002;Schiewer and Patil 2008;Elliott et al 2013). The number of active binding sites presented with carboxyl group residues of the alginate molecule may also change due to varying pH.…”

Section: Effects Of Ph On Yttrium Adsorptionmentioning

confidence: 99%

Removal of yttrium (III) ions from water solutions by alginate compounds

Khotimchenko

Kovalev

Khozhaenko

et al. 2015

Int. J. Environ. Sci. Technol.

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The presence of radioactive substances in wastewaters poses a problem for public health due to the lack of the radioisotope-binding materials. In the present study, the yttrium-binding activity of sodium and calcium salts of alginic acid was investigated in a batch sorption system. The results showed that both polymers are able to form complexes with yttrium ions. The effects of contact time, initial concentration of the metal and pH of the media on the yttrium-binding processes were experimentally investigated. The equilibrium time was found to be at least 60 min required for adsorption of yttrium by alginate compounds regardless of the initial metal concentrations. Langmuir and Freundlich sorption models were applied for description of the binding processes. The results showed that the Langmuir model is best fit within the whole range of pH values used in the studies. The maximum adsorption capacity of calcium and sodium alginates was found to be 99.01 and 181.81 mg/g, respectively, at pH 6.0. Kinetic studies showed that reactions between alginate compounds and yttrium are corresponding to the pseudo-second-order model. These results obviously show that alginate salts may be successfully used as materials for elimination of radioisotopes from water disposals.

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Modeling the effect of pH on biosorption of heavy metals by citrus peels

Cited by 121 publications

References 25 publications

A Chemical and Morphological Study of Cassava Peel: A Potential Waste as Coagulant Aid

A Chemical and Morphological Study of Cassava Peel: A Potential Waste as Coagulant Aid

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

Removal of yttrium (III) ions from water solutions by alginate compounds

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