Investigation of BTEX compounds adsorption onto polystyrenic resin

Makhathini, Thobeka Pearl; Rathilal, Sudesh

doi:10.1016/j.sajce.2017.03.001

Cited by 15 publications

(6 citation statements)

References 20 publications

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“…Although the iron nanoparticles were added as fillers to reduce the pore size of the membranes, the particles themselves were found to have a pore size of 0.015 nm which could have resulted in some of the molecules of BTEX passing through the membrane. The sizes of the various BTEX compounds can also play a role in the possible leakage through the mesopores that may have been formed in the membrane matrix (Su et al , 2016; Makhathini and Rathilal, 2017).…”

Section: Resultsmentioning

confidence: 99%

Performance evaluation of iron nanoparticles infused polyethersulphone (Fe‐NPs/PES) membrane during treatment of BTEX‐contaminated wastewater

Unuigbe

Fayemiwo

Daramola

2019

Water & Environment J

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In this study, polyethersulfone (PES) was infused with iron nanoparticles (Fe-NPs) obtained from the leaf of pomegranate plant to enhance hydrophilicity of the PES membrane. The resulted nanocomposite Fe-NPs/PES membrane obtained via phase inversion was characterized using a scanning electron microscope (SEM) for the morphology; a texture analyzer for the mechanical strength; an atomic force microscope (AFM) for the surface roughness; and water contact angle measurement for the degree of hydrophilicity. The separation performance of the membrane was evaluated using BTEX-containing wastewater. SEM images show that Fe-NPs were distributed uniformly within the membrane with improved mechanical strength. Mechanical strength of PES was enhanced at increasing Fe-NPs loading from 1.2 MPa for the pure PES to 8.94 MPa for 20 wt.% Fe-NPs loaded membrane. AFM analysis reveals that membrane roughness increased with increase in Fe-NPs loading. Also, the contact angle measurement indicates that the hydrophilicity of the composite membrane was enhanced by the addition of Fe-NPs. The permeation properties reveal that pure water flux of the composite membrane increased with increasing Fe-NPs loading. In addition, the highest BTEX rejection obtained was 64.55% at 10 wt.% Fe-NPs loading when compared to the rejection 41.4% obtained from the pure PES membrane evaluated at similar conditions.

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Section: Resultsmentioning

confidence: 99%

Performance evaluation of iron nanoparticles infused polyethersulphone (Fe‐NPs/PES) membrane during treatment of BTEX‐contaminated wastewater

Unuigbe

Fayemiwo

Daramola

2019

Water & Environment J

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“…Measurement methodology was developed based on literature review and own research [34][35][36][37][38][39][40].…”

Section: Research Results and Their Analysismentioning

confidence: 99%

TG/DTG/DTA, FTIR and GC/MS Studies of Oil Sand for Artistic and Precision Foundry with the Emission of Gases Assessment

Bobrowski

Żymankowska-Kumon

Drożyński

et al. 2017

Archives of Foundry Engineering

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The paper presents the results of thermoanalytical studies by TG/DTG/DTA, FTIR and GC/MS for the oil sand used in art and precision foundry. On the basis of course of DTG and DTA curves the characteristic temperature points for thermal effects accompanying the thermal decomposition reactions were determined. This results were linked with structural changes occurred in sample. It has been shown that the highest weight loss of the sample at temperatures of about 320°C is associated with destruction of C-H bonds (FTIR). In addition, a large volume of gases and high amounts of compounds from the BTEX group are generated when liquid metal interacts with oil sand. The results show, that compared to other molding sands used in foundry, this material is characterized by the highest gaseous emissions and the highest harmfulness, because benzene emissions per kilogram of oil sand are more than 7 times higher than molding sand with furan and phenolic binders and green sand with bentonite and lustrous carbon carrier.

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“…The adsorption isotherms are described by a variety of mathematical developments based on empirical fittings while simplifying the physical properties and processes involved in adsorption. The Langmuir isotherm and Freundlich isotherm models are the major models that are predominantly applied in fitting the equilibrium adsorption isotherms of hydrocarbons (Chun et al 2015;Makhathini & Sudes 2017). Experimental data is fitted to the adsorption isotherm model and the best fitted model is applied to characterize equilibrium adsorption.…”

Section: Isotherm Kinetic Modelsmentioning

confidence: 99%

The removal of turbid materials from AMD using bentonite clay, Fe or Al salt, MgCO3 and flocculent with varying agitations

Ntwampe

2020

Water Practice and Technology

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A series of experiments was conducted using 200 mL of acid mine drainage (AMD) collected from Krugersdorp, South Africa, to determine turbid materials removal efficiency of a combination of bentonite clay, Fe or Al salt and MgCO3. The sample was poured into five 500 mL glass beakers using bentonite clay, FeCl3, AlCl3 and MgCO3 dosage respectively. The samples were treated in jar test at rapid and slow mixing, allowed to settle for 1 hour, then the pH, conductivity, TSS, DO and ORP were measured (exp A). A second and third similar sets of experiments were conducted with a combination of bentonite clay and MgCO3 (flocculent) dosage (exp B), and FeCl3 with slow mixing only (exp C). Experimental results revealed that the pH of treated effluent with bentonite clay does not exhibit significant increasing trend because of insignificant hydrolysis, whereas the pH of samples with FeCl3, AlCl3 and MgCO3 exhibit a slight decreasing trend, showing a low rate of hydrolysis. The DO and ORP of treated effluent does not show a significant changing trend compared to the untreated AMD sample. Residual TSS of the AMD samples treated with a flocculent is lower than the samples treated with bentonite clay, FeCl, AlCl3 and MgCO3. Residual turbidity of the samples with rapid mixing is identical to that of the corresponding samples with slow mixing. TSS removal efficiency of a flocculent is higher compared to other reagents. The results show that synthetic flocculent is an ideal replacement for inorganic coagulants. The SEM micrographs exhibit slides with dense-sponge like flocs showing high adsorption capacity.

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Investigation of BTEX compounds adsorption onto polystyrenic resin

Cited by 15 publications

References 20 publications

Performance evaluation of iron nanoparticles infused polyethersulphone (Fe‐NPs/PES) membrane during treatment of BTEX‐contaminated wastewater

Performance evaluation of iron nanoparticles infused polyethersulphone (Fe‐NPs/PES) membrane during treatment of BTEX‐contaminated wastewater

TG/DTG/DTA, FTIR and GC/MS Studies of Oil Sand for Artistic and Precision Foundry with the Emission of Gases Assessment

The removal of turbid materials from AMD using bentonite clay, Fe or Al salt, MgCO3 and flocculent with varying agitations

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