Modified softwood sawdust as adsorbent of heavy metal ions from water

Šćiban, Marina; Klašnja, Mile; Škrbić, Biljana

doi:10.1016/j.jhazmat.2005.12.009

Cited by 208 publications

(70 citation statements)

References 16 publications

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“…2c, d). The main mechanism for the precipitation of heavy metals is the complexation of metals with hydroxyl ions in solutions (Sciban et al 2006). The addition of heavy metals to the non-buffered solution (pH [ 6) and the solutions made up of the EFBB and RHB supernatant decreased the solution's pH.…”

Section: Zeta Potential Of the Efbb And Rhbmentioning

confidence: 99%

Characterization of biochars produced from oil palm and rice husks and their adsorption capacities for heavy metals

Samsuri

Sadegh‐Zadeh

Seh-Bardan

2013

Int. J. Environ. Sci. Technol.

143

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The objectives of this study were to determine the selected physicochemical properties of two biochars, one commercially produced from rice husks and the other from oil palm empty fruit bunches, and to evaluate their adsorption capacities for Zn, Cu, and Pb using a batch equilibrium method. The results showed that there was no significant difference between the carbon content of biochars formed from empty fruit bunches (EFBB) and rice husks (RHB). However, the EFBB did present higher quantities of O, H, S, N, and K, compared to the RHB. Although the EFBB had a much lower surface area than the RHB, the former adsorbed much more Zn, Cu, and Pb than the RHB. The higher adsorption capacity of the EFBB over the RHB was a result of the EFBB having higher amounts of oxygen-containing functional groups, a higher molar ratio of O/C, and a higher polarity index [(O ? N)/C]. This suggests that the biochar's chemical properties were more important than its surface area in the adsorption of Zn, Cu, and Pb.

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Section: Zeta Potential Of the Efbb And Rhbmentioning

confidence: 99%

Characterization of biochars produced from oil palm and rice husks and their adsorption capacities for heavy metals

Samsuri

Sadegh‐Zadeh

Seh-Bardan

2013

Int. J. Environ. Sci. Technol.

143

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“…Sćiban et al [57] conducted an experiment on the efficiency of sawdust as an adsorbent in the removal of Cu(II) ion. It was found that, sawdust contains various organic compounds (lignin, cellulose and hemicellulose) with polyphenolic groups that could bind heavy metal ions through different mechanisms [58].…”

Section: Introductionmentioning

confidence: 99%

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

El-Araby¹,

Ibrahim²,

Mangood³

et al. 2017

GEP

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In this study, the adsorption behavior of copper(II) ions from aqueous solutions onto sesame husk (SH) was investigated. The effect of different parameters such as pH, contact time, adsorbent dosage, adsorbate concentration, temperature and agitation speed was studied. Thermodynamic parameters, equilibrium isotherms and kinetic data have been evaluated. The functional groups and surface morphology of SH adsorbent were characterized by FTIR and SEM. Adsorption equilibrium isotherms were expressed by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption models and it was found that Langmuir adsorption model fits the experimental data better than Freundlich and D-R models. The adsorption can be best described by the pseudo second-order kinetic model.

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“…This was attributed to the fact that, at low pH (< 4), the protonation of the active sites at carbon surface was enhanced and this refused the formation of links between cationic metals and protonated active sites. Some authors have reported that at higher pH, metal complex forms and results in precipitation and therefore the separation may not be due to adsorption [195][196].…”

Section: Effect Of Solution Phmentioning

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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Modified softwood sawdust as adsorbent of heavy metal ions from water

Cited by 208 publications

References 16 publications

Characterization of biochars produced from oil palm and rice husks and their adsorption capacities for heavy metals

Characterization of biochars produced from oil palm and rice husks and their adsorption capacities for heavy metals

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

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

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