Biosorption of heavy metal ions using wheat based biosorbents – A review of the recent literature

Farooq, Umar; Koziński, Janusz A.; Khan, Misbahul Ain; Athar, Makshoof

doi:10.1016/j.biortech.2010.02.030

Cited by 795 publications

(371 citation statements)

References 113 publications

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“…From the data, it can be seen that in the unloaded biomass, the broadband at 3394 cm −1 was due to H bonded -OH group stretching vibrations (26). Band at 2795 cm −1 was attributed to -CH stretching of methoxy group and 1614 cm −1 could be assigned to asymmetric -C=O stretching vibration (27). Asymmetric and symmetric SO 3 stretching vibrations gave bands at 1381 and 1173 cm −1 , respectively (28).…”

Section: Characterization Of Biosorbentmentioning

confidence: 96%

“…A pH of solution, less than 5, protonates the material resulting in positively charged surface and a decreased biosorption in an acidic medium. On the other hand, a pH above 5 will result in the negatively charged surface and increased biosorption of Hg(II) ions (27). Hence, P. cruentum has an acidic surface that might be due to dissociation of carboxyl groups in alginic acid as well as some contribution from aspartic acid and glutamic acid present in algal proteins (28).…”

Section: Characterization Of Biosorbentmentioning

confidence: 99%

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Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass ofPorphyridium cruentum

Zaib

Athar

Saeed

et al. 2016

Green Chemistry Letters and Reviews

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Among a variety of microbial materials employed for biosorption, algae have added advantages of non-toxic and autotrophic nature. In this study, biosorption of Hg(II) was studied with red algal biomass of Porphyridium cruentum. The parameters affecting biosorption such as dosage of biosorbent, pH, contact time, initial metal concentration, temperature and effect of foreign metal cations in binary system were evaluated. Kinetic data were described with the help of pseudofirst-order and pseudo-second-order kinetic models. Langmuir, Freundlich, Temkin and DubininRadushkevich isotherm models were applied to adsorption equilibrium data. According to the results, the maximum removal capacity (q max ) was 2.62 mg/g observed at pH 7 with 0.25 g/L of biosorbent dosage for Hg(II) solution containing 10 mg/L of metal ions. The Langmuir isotherm model fits best to the adsorption data while the kinetic data followed the pseudo-second-order model. Thermodynamics studies showed that the biosorption process of Hg(II) on P. cruentum was exothermic in nature.ARTICLE HISTORY

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Section: Characterization Of Biosorbentmentioning

confidence: 96%

Section: Characterization Of Biosorbentmentioning

confidence: 99%

Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass ofPorphyridium cruentum

Zaib

Athar

Saeed

et al. 2016

Green Chemistry Letters and Reviews

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“…In contrast, as solution pH increased, the protons concentration decreased and the algal surface would be more negatively charged leading to electrostatic attraction of the positively charged metal ions and hence biosorption is enhanced until reached its maximum [31][32][33]. The decrement in the uptake capacity at higher pH values may be attributed to (i) the high concentration of OH − ions that led to precipitation of metals as hydroxides [34], and (ii) the electrostatic repulsion between the negatively charged algal surfaces and the negatively charged anionic species in solution [35,36]. Moreover, the lower uptake at higher pH values could be due to inactivating of the binding sites in alkaline conditions [37].…”

Section: Optimization Of Heavy Metals Biosorptionmentioning

confidence: 99%

Comparative Study for Biosorption of Heavy Metals from Synthetic Wastewater by Different Types of Marine Algae

Ibrahim¹,

Aziz²,

Hamdy³

et al. 2018

J Bioremediat Biodegrad

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Pollution by heavy metal ions is one of the major environmental problems in many countries. In this study, four different species of dried marine macroalgae, Ulva lactuca, Jania rubens, Pterocladia capillacea and Colpomenia sinosa were used for the removal of toxic heavy metal ions Pb +2 , Cd +2 and Ni +2 from synthetic wastewater. In general, the highest efficiency of metal ion bioremoval was recorded for red alga J. rubens followed by C. sinosa and the lowest one was recorded for U. lactuca, with mean removal values of 91%, 89% and 85%, respectively. The effect of several parameters such as contact time, algal dose, effect of pH, and initial concentration of metal ions on the adsorption process was estimated. The optimum adsorption was found to occur at pH 5.0, contact time 60 min, adsorbent dose 20 g/L and initial concentration 40 mg/L. This work confirms the potential use of red macroalga J. rubens as an inexpensive and efficient alternative technology, for sequestering heavy metal ions from wastewater.

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“…Most of them suffer from some defects such as incomplete removal of contaminants and are characterized by low selectivity, applications of high reagent, chemical and energy requirements, the generation of other toxic wastes that need to be handled carefully, and -even more importanthigh cost [9]. Conversely, biosorption was defined as the removal of materials such as HM ions and SD molecules by inactive, non-living material or biological origin and has arisen as an effective alternative, a fine eco-friendly technology, and at low cost [10]. Among all these mentioned techniques involving reclamation of industrial and municipal wastewater, adsorption is generally found to be a very promising one due to its high effectiveness and complete removal of metal ions even at low concentrations, and its low cost and easy adaptation and sorbent material separation from the aqueous phase after finishing treatment [11].…”

Section: Introductionmentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

209

112

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A major threat to the comfort of human life has been imposed by increased industrialization and urbanization. The generation and disposal of huge amounts of toxic materials and pollutants have heavily contaminated our environment. Some Organics such as synthetic dyes (SD) and heavy metals (HM) are becoming increasingly prevalent as the most dangerous pollutants in soil and surface water environments. They are causing great concern worldwide due to their toxicity to many life forms.Environmentally friendly utilization of agricultural by-products/waste materials either as raw materials or in production of so-called activated carbons (AC) is an important issue. Because it is apparent from our literature review that the main factors characterizing these materials are their affordability, local availability, and efficiencies in removing many unwanted toxics and pollutants, they therefore could be utilized instead of more conventional but expensive adsorbent materials, particularly in developing countries where many industries lack appropriate individual sewage treatment systems; even where they exist, they lack satisfactory functioning and maintenance because of the lack of good budgets.A number of case studies are supplied in this review. These case studies have pointed to the efficient removal of SD/HM ions from aqueous solutions by the agricultural by-products/wastes in the form of a raw material, signifying spent tea leaves (STL) as a good example. Besides, the efficient removal of such ions by AC produced from these agricultural by-products/wastes has also been given in detail, suggesting a variety of AC agricultural by-products/wastes sources. Both kinds are widely used adsorbents in the treatment of wastewaters. Our review has shown that these adsorbents are characterized by many exceptional physical and chemical features that make them widely used adsorbents in the treatment of wastewaters. The adsorption efficiencies by these substances were also affected by the characteristics of AC, which depend on the physical and chemical properties of the precursor (i.e., agricultural by-products/wastes) as well as on the activation method applied, which is either chemical or physical. The structural properties of the resulting

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Biosorption of heavy metal ions using wheat based biosorbents – A review of the recent literature

Cited by 795 publications

References 113 publications

Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass ofPorphyridium cruentum

Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass ofPorphyridium cruentum

Comparative Study for Biosorption of Heavy Metals from Synthetic Wastewater by Different Types of Marine Algae

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

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