Removal of Emulsified Oil from Water by Fruiting Bodies of Macro-Fungus (Auricularia polytricha)

Yang, Xunan; Guo, Mengting; Wu, Yaopan; Wu, Qi-Zhen; Zhang, Renduo

doi:10.1371/journal.pone.0095162

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…The adsorption process rate and its effect on the equilibrium time are often determined by kinetic models. The mass transport process and chemical and/or physical characteristics of the adsorbent affect the adsorption mechanism [34]. In order to explore the mechanism of biosorption and potential rate controlling steps, such as chemical reaction processes and mass transport, the distinguished pseudo-first-order, pseudo-second-order models have been applied to evaluate the experimental data.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Performance of Posidona oceanica (L.) as Biosorbent for Crude Oil-Spill Cleanup in Seawater

Jmaa

Kallel

2019

BioMed Research International

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The marine environment is constantly at risk of pollution by hydrocarbon spills that requires its cleanup to protect the environment and human health. Posidonia oceanica (L.) (PO) beach balls, which are characteristic of the Mediterranean Sea and abundant on the beaches, are used as biosorbent to remove hydrocarbons from the sea. The impact of several factors such as oil concentration, time sorption, and weight sorbent was investigated to determine the oil and water sorption capacity for raw and milled P. oceanica fibers. The study of kinetic models for initial crude oil concentration of 2.5, 5, 8.8, 10, 15, 20, 30, and 40 g/L revealed that crude uptake followed the pseudo-first-order model while, for isotherm models, the crude uptake onto the P. oceanica tended to fit the Langmuir model. Experiments were performed according to two systems: a pure oil and pure water system and a mixed oil/water system. For the dry system (pure oil and pure water), the maximum oil and water sorption capacity of raw and milled fibers was found to be 5.5 g/g and 14 g/g for oil and 14.95 g/g and 15.84 g/g for water, respectively, whereas, in the mixed oil/water system, the maximum oil and water sorption capacity was estimated as 4.74 g/g, 12.80 g/g and 7.41 g/g, 8.31 g/g, respectively. The results showed that, in spite of their absorbency of a lot of water, the milled fibers with grain size ranging between 0.5 mm and 1 mm might be the relevant sorbent for the elimination of crude oil from seawater thanks to its efficient sorption capacity and low cost.

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Section: Resultsmentioning

confidence: 99%

Assessment of Performance of Posidona oceanica (L.) as Biosorbent for Crude Oil-Spill Cleanup in Seawater

Jmaa

Kallel

2019

BioMed Research International

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“…9 ) 49 models were used to describe the adsorption equilibrium. where q m is the maximum adsorption capacity (mg g −1 ), K L is the Langmuir adsorption equilibrium constant (L mg −1 ), K F and n are Freundlich constants representing the adsorption capacity (L −1/n mg −(1−n) g −1 ) and the adsorption intensity varying with the degree of heterogeneity, respectively, and K L ’ and n ’ are the Langmuir adsorption equilibrium constant (L mg −1 ) and the adsorption intensity, respectively 50 .…”

Section: Methodsmentioning

confidence: 99%

Highly efficient removal of Sb(V) from water by franklinite-containing nano-FeZn composites

Zhang

et al. 2021

Sci Rep

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The existence of toxic and carcinogenic pentavalent antimony in water is a great safety problem. In order to remove antimony(V) from water, the purpose of this study was to prepare a novel graphene nano iron zinc (rGO/NZV-FeZn) photocatalyst via hydrothermal method followed by ultrasonication. Herein, weakly magnetic nano-Fe–Zn materials (NZV-FeZn, GACSP/NZV-FeZn, and rGO/NZV-FeZn) capable of rapid and efficient Sb(V) adsorption from water were prepared and characterised. In particular, rGO/NZV-FeZn was shown to comprise franklinite, Fe0, and graphite. Adsorption data were fitted by a quasi-second-order kinetic equation and Langmuir model, revealing that among these materials, NZV-FeZn exhibited the best Sb removal performance (543.9 mgSb gNZV-FeZn−1, R2 = 0.951). In a practical decontamination test, Sb removal efficiency of 99.38% was obtained for a reaction column filled with 3.5 g of rGO/NZV-FeZn. Column regenerability was tested at an initial concentration of 0.8111 mgSb L−1, and the treated water obtained after five consecutive runs complied with the GB5749-2006 requirement for Sb. rGO/NZV-FeZn was suggested to remove Sb(V) through adsorption-photocatalytic reduction and flocculation sedimentation mechanisms and, in view of its high cost performance, stability, and upscalable synthesis, was concluded to hold great promise for source water and wastewater treatment.

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“…Two kinetic models, a pseudo-first-order model and a pseudo-second-order model, were used to characterize the adsorption kinetics of chromium (Cr or Cr 6+ ) on the loaded activated carbon composites (NZVI/GAC). The integrated forms of the two models are as follows:where q e is the amount of chromium ions adsorbed at equilibrium (mgg −1 ), and k 1 (s −1 ) and k 2 (gmg −1 s−1 ) are the rate constants of the pseudo-first and pseudo-second-order adsorptions, respectively 57 .…”

Section: Methodsmentioning

confidence: 99%

Chromium ion removal from raw water by magnetic iron composites and Shewanella oneidensis MR-1

Zhang

et al. 2019

Sci Rep

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In this study, nanoiron active carbon composites (NZVI/GAC) were used to remove chromium ions from raw water. The composites were synthesized from a novel formula of biological activated carbon and characterized by various techniques. The adsorption test data were fit by a pseudo-second-order kinetic model and Langmuir model. The q e and R 2 values were 187 mg Cr/g and 0.9960, respectively, with 0.2 g/L NZVI/GAC at an initial concentration of 118 mg/L Cr according to the Langmuir isotherm model. Moreover, a Cr 6+ detoxification reactor was constructed with the magnetic iron composite. The results indicated that the synthesized magnetic iron composite was a significant adsorbent for Cr 6+ removal from aqueous solutions. The detoxification reactor was able to remove Cr 6+ from raw water at an initial concentration of 26.5 mg/L within a short time period (3–5 min), with a removal efficiency of up to 99.90% and a treatment capacity of 45.0 mg Cr 6+ /g of adsorbent; the Cr 6+ concentrations in the outflow met the GB5749–2006 requirements for drinking water. A synergistic effect between NZVI/GAC and a suspension of the bacterium Shewanella oneidensis MR-1 was found, showing that this bacterium can be used as a regeneration agent for iron-depleted activated carbon materials.

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Removal of Emulsified Oil from Water by Fruiting Bodies of Macro-Fungus (Auricularia polytricha)

Cited by 22 publications

References 29 publications

Assessment of Performance of Posidona oceanica (L.) as Biosorbent for Crude Oil-Spill Cleanup in Seawater

Assessment of Performance of Posidona oceanica (L.) as Biosorbent for Crude Oil-Spill Cleanup in Seawater

Highly efficient removal of Sb(V) from water by franklinite-containing nano-FeZn composites

Chromium ion removal from raw water by magnetic iron composites and Shewanella oneidensis MR-1

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