From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass

Stjepanović, Marija; Velić, Natalija; Galić, Antonela; Kosović, Indira; Jakovljević, Tamara; Habuda-Stanić, Mirna

doi:10.3390/w13030279

Cited by 39 publications

(21 citation statements)

References 50 publications

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“…The adsorbent concentration is an important factor that influences the adsorption process and defines the adsorption capacity of the adsorbent for a given initial concentration of metal ions solution. 81 , 82 For the purpose of observing the effect of this parameter on the rate of metallic bio-sorption and determining the lower and upper levels of OMSR-W concentration for removing the metals efficiently; uptake experiments were carried out using different concentrations of OMSR-W at a pH value of 5.5. The results obtained are shown in Figure 4c .…”

Section: Resultsmentioning

confidence: 99%

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Removal of Cadmium, Copper, and Lead From Water Using Bio-Sorbent From Treated Olive Mill Solid Residue

Mahmoud

Fayed

Ibrahim

et al. 2021

Environ�Health�Insights

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Olive Mill Solid Residue (OMSR) can be utilized as a bio-sorbent in wastewater treatment. Even though several studies on OMSR as a bio-sorbent were carried out, there is still a need to investigate a simple and relatively inexpensive OMSR treatment that increases pollutant removal. In this study; OMSR is used in batch experiments to remove toxic heavy metals from aqueous solutions including Cd2+, Cu2+, and Pb2+ ions. The effect of OMSR treatment (untreated; OMSR-U, treated with n-hexane; OMSR-H, and treated with water; OMSR-W) was investigated by chemical oxygen demand and cation exchange capacity. It was confirmed by both tests that OMSR-W was the best treatment. The same result was re-confirmed by batch uptake experiments of the heavy metal ions. Using OMSR-W as a bio-sorbent; the effect of several parameters such as pH, contact time, bio-sorbent concentration, metal ions concentration, and the presence of other metal species were studied to figure their influence on the metal ions uptake. The optimum conditions for single metal systems were found to occur at pH 5.5, an initial metal concentration of 50 mg/L, a shaking time of 60 minutes, a bio-sorbent concentration of 20 g/L. In binary metal ions solutions; Cd2+ uptake was increased in presence of Cu2+ or Pb2+. However, the uptake of Cu2+ and Pb2+ was decreased in presence of other metals. The equilibrium sorption data for single metal systems were described by the Langmuir isotherm model. The highest value of maximum uptake was found for Pb2+ (4.587 mg/g) followed by Cd2+ (4.525 mg/g) and Cu2+ (4.367 mg/g). These results show that OMSR-W, which has a very low economical value, could be used for the treatment of wastewater contaminated with heavy metals.

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Section: Resultsmentioning

confidence: 99%

“…This is basically what led to the increase in metal ions removal. 80,81 However; the adsorption will increase up to certain OMSR-W concentrations, after that, the effect of the increase in OMSR-W amount becomes insignificant. This is due to the inability of metal ions to reach to the adsorbent surface.…”

Section: Resultsmentioning

confidence: 99%

Removal of Cadmium, Copper, and Lead From Water Using Bio-Sorbent From Treated Olive Mill Solid Residue

Mahmoud

Fayed

Ibrahim

et al. 2021

Environ�Health�Insights

View full text Add to dashboard Cite

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“…Although not regularly investigated in biosorption studies, particle size can be an important factor in heterogeneous chemical reactions and adsorption [ 203 ]. The small particle sizes result in a higher specific surface area.…”

Section: Factors Affecting Adsorption Processmentioning

confidence: 99%

“…If the particle size is too small, the adsorption capacity may be lower, depending on the type of adsorbent, as the lighter particles float and thus cannot contact the solution. The separation of these small particles from water after biosorption can be challenging [ 203 ].…”

Section: Factors Affecting Adsorption Processmentioning

confidence: 99%

Factors Affecting Synthetic Dye Adsorption; Desorption Studies: A Review of Results from the Last Five Years (2017–2021)

2021

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The primary, most obvious parameter indicating water quality is the color of the water. Not only can it be aesthetically disturbing, but it can also be an indicator of contamination. Clean, high-quality water is a valuable, essential asset. Of the available technologies for removing dyes, adsorption is the most used method due to its ease of use, cost-effectiveness, and high efficiency. The adsorption process is influenced by several parameters, which are the basis of all laboratories researching the optimum conditions. The main objective of this review is to provide up-to-date information on the most studied influencing factors. The effects of initial dye concentration, pH, adsorbent dosage, particle size and temperature are illustrated through examples from the last five years (2017–2021) of research. Moreover, general trends are drawn based on these findings. The removal time ranged from 5 min to 36 h (E = 100% was achieved within 5–60 min). In addition, nearly 80% efficiency can be achieved with just 0.05 g of adsorbent. It is important to reduce adsorbent particle size (with Φ decrease E = 8–99%). Among the dyes analyzed in this paper, Methylene Blue, Congo Red, Malachite Green, Crystal Violet were the most frequently studied. Our conclusions are based on previously published literature.

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“…Adsorption isotherms provide information about the distribution between liquid and solid phases in equilibrium and give insight into the maximum adsorption capacity of an adsorbent for adsorbate [41]. For this purpose, the Langmuir and Freundlich adsorption isotherms are usually used.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Modified Grape Seeds: A Promising Alternative for Nitrate Removal from Water

2021

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The aim of this work was to investigate grape seeds as a potential adsorbent for nitrate removal from water. Grape seeds were modified by quaternization and the applicability of the modified grape seeds (MGS) was evaluated in batch adsorption experiments. Fixed bed adsorption and regeneration studies were carried out to determine the regeneration capacity of MGS. The maximum adsorption capacity of 25.626 mg g−1 at native pH (6.3) for nitrate removal by MSG was comparable to that of the commercial anion exchange resin Relite A490 under similar conditions. The percent removal of nitrate from model nitrate solution was 86.47% and 93.25% for MGS, and Relite A490, respectively, and in synthetic wastewater 57.54% and 78.37%. Analysis of the batch adsorption data using isotherm models revealed that the Freundlich model provided a better fit to the data obtained than the Langmuir model, indicating multilayer adsorption. In kinetic terms, the results showed that the adsorption followed the pseudo-first order model. By investigating the adsorption mechanism, the results suggest that the intraparticle diffusion model was not the only process controlling the adsorption of nitrate on MGS. In column experiments (adsorption/desorption studies), three adsorption cycles were tested with minimal decrease in adsorption capacities, implying that this alternative adsorbent can be successfully regenerated and reused.

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From Waste to Biosorbent: Removal of Congo Red from Water by Waste Wood Biomass

Cited by 39 publications

References 50 publications

Removal of Cadmium, Copper, and Lead From Water Using Bio-Sorbent From Treated Olive Mill Solid Residue

Removal of Cadmium, Copper, and Lead From Water Using Bio-Sorbent From Treated Olive Mill Solid Residue

Factors Affecting Synthetic Dye Adsorption; Desorption Studies: A Review of Results from the Last Five Years (2017–2021)

Modified Grape Seeds: A Promising Alternative for Nitrate Removal from Water

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