Adsorptive Removal of 2-Nitrophenol and 2-Chlorophenol by Cross-Linked Algae from Aqueous Solutions

Navarro, Abel E.; Cuizano, Norma A.; Portales, Rosario F.; Llanos, Bertha P.

doi:10.1080/01496390802221642

Cited by 23 publications

(12 citation statements)

References 32 publications

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“…properties, however a higher surface randomness is observed in SG, demonstrating this adsorbent could have a higher adsorption due to the complexity of its surface. Similar results have been observed with other biomasses such as spent tea leaves [26,27] and other types of marine algae [15,17].…”

Section: Characterization Of the Adsorbentssupporting

confidence: 78%

“…Both adsorbent show similar morphological properties, however a higher surface randomness is observed in SG, demonstrating this adsorbent could have a higher adsorption due to the complexity of its surface. Similar results have been observed with other biomasses such as spent tea leaves [26,27] and other types of marine algae [15,17]. properties, however a higher surface randomness is observed in SG, demonstrating this adsorbent could have a higher adsorption due to the complexity of its surface.…”

Section: Characterization Of the Adsorbentssupporting

confidence: 75%

“…As previously mentioned, SG and CM are brown and green algae, respectively; therefore main structural and chemical composition differences are expected. Brown algae are known to contain a higher concentration of polyalginic acid, which is believed to contribute to the adsorption of pollutants [14,15] This hypothesis is corroborated by a weak peak at 1680 cm −1 and the absence of the peak at 1425 cm −1 for CM. These peaks are associated with the presence of carbonyl groups, main components of alginates.…”

Section: Characterization Of the Adsorbentssupporting

confidence: 60%

“…No buffer was used in the preparation of the solution to minimize salt effects in the experiments. This protocol has been previously used with other inorganic and organic pollutants [12][13][14][15][16][17][18]. The initial pH of each solutions was adjusted to the required values by adding aliquots of diluted HCl and NaOH prior to contact with the adsorbents.…”

Section: Reagents and Solutionsmentioning

confidence: 99%

“…Bioremediation as an area of biotechnology has explored the potential use of these seaweeds as adsorbents of pollutants. Different types of algae have been studied for the removal of heavy metals [12][13][14], phenolic compounds [15,16] and dyes [17,18] yielding positive results. Other alternative materials have also been studied, for example natural clays reported a high affinity towards inorganic and organic pollutants [19][20][21][22] and are extracted from natural mines at minimal cost.…”

Section: Introductionmentioning

confidence: 99%

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Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed

et al. 2016

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Among several Puerto Rican algae, Sargassum sp. (SG) and Chaetomorpha (CM) showed the highest phenol adsorption capacity from aqueous solutions and were used in optimized adsorption batch experiments at room temperature. The effects of pH, adsorbent dose, phenol concentration, salinity and presence of interfering substances were evaluated. Initial solution pH exhibited a strong effect, mainly on the phenol aqueous chemistry; showing the maximum adsorption at pH 10. Sorption isotherm results were modelled according to the Langmuir, Tempkin and Freundlich equations. Isotherm modelling indicated a maximum adsorption capacity (q max ) of 82.10 and 17.7 mg of phenol per gram of SG and CM, respectively. Salinity and presence of detergent in the matrix solution showed a positive effect on the adsorption, suggesting that adsorption of phenol was mostly driven by polar forces and not by ionic exchange. On the other hand, presence of heavy metals like copper, lead and cobalt had a negative effect on the adsorption. According to these results, the potential formation of hydrogen bonds between the algae and phenol is proposed as the main adsorption mechanism. These results provide further insight into the adsorption mechanism of phenol and their use as inexpensive adsorbents for the treatment of phenol-containing wastewaters.

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Section: Characterization Of the Adsorbentssupporting

confidence: 78%

Section: Characterization Of the Adsorbentssupporting

confidence: 75%

Section: Characterization Of the Adsorbentssupporting

confidence: 60%

Section: Reagents and Solutionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed

et al. 2016

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Phenol removal from wastewater using eco‐friendly hybrid hydrogels

Dutra

Marques

Filho

et al. 2021

J of Applied Polymer Sci

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The intent of this study was to evaluate the ability of low‐cost polyacrylamide/starch hybrid hydrogels in removing organic pollutants from wastewater, using phenol as a model compound, besides of investigating the adsorption/desorption behavior as a function of hydrogels composition. The results indicated that the hydrogel with the lowest amount of starch and crosslinking agent exhibited the maximum phenol adsorption capacity, 21 mg g−1. The adsorption isotherm data were described by Langmuir and Freundlich adsorption isotherm models. According to linear regression analysis, the Freundlich isotherm model was the best fit among the isotherm models for the adsorption process. Furthermore, desorption study revealed a minimum of about 60% of phenol release, indicating reusability to wastewater treatment.

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Removal of substituted phenols onto iron‐treated Nostoc sp. biomass

Gururani

Srivastava

Sharma

et al. 2020

Remediation Journal

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This study explored the possibility of removing 4‐nitrophenol (4‐NP) and 2,4‐dichlorophenol (2,4‐DCP) from water by using a dead blue‐green algae, Nostoc sp., dried and untreated and dried and treated with iron (Fe‐treated with 0.1 M ferric chloride solution for 1 day). The Nostoc sp. untreated and Fe‐treated biomass were used to study the sorption and desorption of 4‐NP and 2,4‐DCP. The effects of solute concentration, ionic strength, and temperature on sorption and desorption in the presence of untreated and treated Nostoc sp. biomass were investigated. The Fe‐treated Nostoc sp. biomass sorbed higher amounts of both 4‐NP and 2,4‐DCP than the untreated biomass. The percent cumulative desorption decreased from 6.41% to 0.28% and 1.84% to 0.19%, respectively, for 4‐NP and 2,4‐DCP for the Fe‐treated biomass. Biosorption of 4‐NP and 2,4‐DCP onto untreated and Fe‐treated Nostoc sp. biomass conformed to Freundlich isotherms. Iron treatment of Nostoc sp. biomass increased the value of ln K from 8.07 to 8.59 for 4‐NP and from 8.04 to 8.51 for 2,4‐DCP but decreased their desorption. An increase in ionic strength (0.003–0.03) increased the biosorption of both substituted phenols and decreased their percent desorption. An increase in temperature in the range of 15–35°C decreased the sorption of 4‐NP and 2,4‐DCP onto both untreated and Fe‐treated Nostoc sp. biomass and increased their desorption, indicating that the biosorption of both substituted phenols onto untreated and Fe‐treated Nostoc sp. biomass was principally a physical process. The results of this study suggest that Fe‐treated dried Nostoc sp. biomass could be explored as an inexpensive and eco‐friendly material for the effective removal of these phenols and, potentially, other chemicals from industrial wastewater and contaminated groundwater.

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Adsorptive Removal of 2-Nitrophenol and 2-Chlorophenol by Cross-Linked Algae from Aqueous Solutions

Cited by 23 publications

References 32 publications

Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed

Bioremoval of Phenol from Aqueous Solutions Using Native Caribbean Seaweed

Phenol removal from wastewater using eco‐friendly hybrid hydrogels

Removal of substituted phenols onto iron‐treated Nostoc sp. biomass

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