Marula seed husk (Sclerocarya birrea) biomass as a low cost biosorbent for removal of Pb(II) and Cu(II) from aqueous solution

Moyo, Mambo; Guyo, Upenyu; Mawenyiyo, Grace; Zinyama, Ngceboyakwethu P.; Nyamunda, Benias C.

doi:10.1016/j.jiec.2014.12.026

Cited by 72 publications

(29 citation statements)

References 49 publications

(58 reference statements)

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“…The comparison of biosorption capacity of three biosorbents for Pb(II) with various biomasses is presented in Table 4. It was found to be comparable and higher than those of many corresponding sorbents in literature [27,28,34,36,37]. The maximum biosorption capacity range of biosorbents were 51.9−82.9 mg/g, which is 6-10 times higher when comparing with the previous similar research that used a Lipton tea leaves as a biosorbent [32].…”

Section: Effect Of Initial Pbsupporting

confidence: 47%

“…For the removal of lead by other biosorbents, a similar reaction rate was determined as a pseudo-II order process [30,38]. According to the pseudo-II order kinetic model the biosorption of lead ions onto EC, NP, and TL are based on chemical reaction, involving sharing or exchange of electrons between sorbent and sorbate [28,37]. The pseudo-II order kinetic model also can be confirmed by the initial results of FT-IR spectroscopy ( Figure 1), which demonstrates binding sites of biosorbents.…”

Section: Effect Of Initial Pbmentioning

confidence: 99%

“…The high affinity of biosorbents for lead ions most likely due to various mechanisms operating simultaneously: electrostatic interactions, and chemical interactions, comprising ion exchange reactions (with H + of the carboxyl and hydrohyl groups or K + , Ca 2+ , Mg 2+ ). Binding sites of biosorbent for lead ion must be either and or both hydroxyl or carboxyl groups forming …−O−Pb… like combination or with amide groups in amino acids [28,37]. Table 5.…”

Section: Effect Of Initial Pbmentioning

confidence: 99%

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Biosorption of lead (II) from an aqueous solution using biosorbents prepared from water plants

Enkhdul

Lin

et al. 2018

Mong. J. Chem.

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Due to its toxicity causing serious health problems, persistence in the environment and non-biodegradability, lead (Pb) is considered as one of the most harmful metals on earth. In this study, dried aquatic plants as sorbents including Nymphoides peltata (NP), Typha laxmannii (TL), and Eichhornia crassipes (EC) were examined and compared to discover the best biosorption for Pb. The effect of physical and chemical parameters including pH (2.0-5.5), sorbent dosage (1-5 g/l), metal concentration (20-100 mg/l), and contact time (~240 min) were investigated to determine the optimal condition for Pb(II) biosorption. As a result, the optimum pH, sorbent dosage, and contact time were 5.0, 1 g/l, and 120 minutes, respectively. Pb 2+ biosorption data were found to follow the Langmuir isotherm model while the kinetic biosorption data followed pseudosecond-order model. The maximum biosorption capacity from Langmuir model was calculated as 63.3, 82.9, and 51.9 mg/g for EC, NP, and TL, respectively. All the results showed that biosorption efficiencies of Pb(II) by different biosorbents were in following order NP>EC>TL.

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Section: Effect Of Initial Pbsupporting

confidence: 47%

Section: Effect Of Initial Pbmentioning

confidence: 99%

Section: Effect Of Initial Pbmentioning

confidence: 99%

See 1 more Smart Citation

Biosorption of lead (II) from an aqueous solution using biosorbents prepared from water plants

Enkhdul

Lin

et al. 2018

Mong. J. Chem.

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“…The initial concentration-profile plot shows a remarkable decrease in removal efficiency as initial concentration is increased. At low concentration, most of the metal ions in the solution interact with active sites on the adsorbent, resulting in high percentage removal [28].…”

Section: Model Interpretationmentioning

confidence: 99%

Application of Central Composite Design in the Adsorption of Ca(II) on Metakaolin Zeolite

Guyo

Phiri

Chigondo

2017

Journal of Chemistry

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Metakaolin zeolite-A was synthesized from thermally activated kaolin clay and characterized by Fourier Transform Infrared Spectroscopy and X-Ray Diffraction Spectroscopy. The effects of pH (2-10), contact time (10-180 min), initial concentration (5-120 mgL −1 ), and dosage (0.1-2 g) and their interactions were investigated using response surface methodology following a central composite design. Optimum removal (87.70%) was obtained at pH 6, contact time 180 min, initial concentration 40.0 mgL −1 , and adsorbent dosage 1.0 g by Excel Solver using the GRG solving method. The adsorption data fitted best to the Langmuir model with correlation coefficient 2 = 0.993 and Chi-square value 2 = 4.76. The Freundlich isotherm gave a correlation coefficient 2 = 0.933 and 2 = 37.91. The adsorption process followed the pseudo-second-order model. The calculated thermodynamic parameters showed that the adsorption process was endothermic and not thermodynamically spontaneous. The studied zeolite-A can therefore be used as a promising adsorbent for the removal of Ca(II) ions from aqueous solutions.

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“…In order to come up with an optimum design for successful sorptive removal of heavy metal ions from wastewaters it is imperative to establish the best correlation for the equilibrium isotherms (Moyo et al, 2015). In present study, the equilibrium data obtained for Cd(II) removal using wastes of Abies alba bark were interpreted by means of two parameters isotherm models, Langmuir and Freundlich.…”

Section: Isotherms Of Cd(ii) Sorptionmentioning

confidence: 99%

Removal of cadmium (II) from aqueous effluents by sorption on Romanian silver fir tree bark (Abies alba Mill.) wastes

Tofan¹,

Păduraru²,

Bunia³

et al. 2017

Issue 1

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In last decades the search for new low cost sorbents that have heavy metal ions binding capabilities is a hot topic in the field of clean-up technologies. In this study, wastes of Romanian silver tree (Abies alba) bark were explored for first time as green and economical sorbent for the removal of Cd(II) ions from aqueous solutions. The effect of various experimental parameters such as initial solution pH, sorbent dose, initial Cd(II) concentration, temperature and contact time has been investigated under batch conditions. The Langmuir and Freundlich models were used to describe the equilibrium isotherms and both models have been fitted very well. According to the evaluation using the Langmuir equation, the maximum sorption capacity of Cd (II) ions on Abies alba bark waste was found to be 11.98 mg g -1 at 293 K. The thermodynamic parameters showed that the process of Cd(II) sorption on silver fir tree bark was feasible, spontaneous and endothermic. Kinetic data were properly fitted with the pseudo-second order model. The obtained results strongly suggest that Romanian silver tree (Abies alba) bark is eligible as an efficient sorbent for the decontamination of toxic metals from wastewaters.

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Marula seed husk (Sclerocarya birrea) biomass as a low cost biosorbent for removal of Pb(II) and Cu(II) from aqueous solution

Cited by 72 publications

References 49 publications

Biosorption of lead (II) from an aqueous solution using biosorbents prepared from water plants

Biosorption of lead (II) from an aqueous solution using biosorbents prepared from water plants

Application of Central Composite Design in the Adsorption of Ca(II) on Metakaolin Zeolite

Removal of cadmium (II) from aqueous effluents by sorption on Romanian silver fir tree bark (Abies alba Mill.) wastes

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