Review: &lt;i&gt;BTEX compounds in water – future trends and directions for water treatment&lt;/i&gt;

Fayemiwo, Oluwademilade M.; Daramola, Michael O.; Moothi, Kapil

doi:10.4314/wsa.v43i4.08

Cited by 55 publications

(33 citation statements)

References 98 publications

(121 reference statements)

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“…Doherty and Otitoloju [27] also reported higher total BTEX content in water in comparison with sediment from the Lagos lagoon. According to Fayemiwo [28], the occurrence of BTEX compounds in water is an alarming trend, especially in vulnerable parts of the world such as South-East Asia and Africa where these water bodies are directly relied upon for drinking and other potable uses. The presence of these chemicals in sediment is also on the whole, not a good indication.…”

Section: Discussionmentioning

confidence: 99%

Bioaccumulation of BTEX and PAHs in Heterotis niloticus (Actinopterygii) from the Epe Lagoon, Lagos, Nigeria

Akinsanya

Ayanda

Onwuka

et al. 2020

Heliyon

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Toxicity studies in the aquatic ecosystem have shown that petrol and its product have adverse effects on aquatic biota. They are able to easily absorb these toxic substances into their bodies from sediment, water or even food items that are contaminated, thus impacting the food chain. In this study, water, sediment and fish (Heterotis niloticus) from the Epe Lagoon were investigated for the presence of BTEX (benzene, toluene, ethylbenzene and the three xylene isomers m, o and p-xylenes), and PAHs using GC-MS. Total concentration of BTEX in sediment and water was respectively 32.37 AE 1.07 μg/g, 49.86 AE 7.30 μg/L; while total concentration of BTEX in fish liver and intestine was 33.75 AE 10.09 and 40.16 AE 9.64 μg/g respectively. Benzene, 1,2-Dichlorobenzene and 1,3-Dichlorobenzene components of BTEX were not detected in both sediment and water. Total concentration of PAH in sediment and water was 7.46 AE 1.73 μg/g and 19.33 AE 1.31 μg/L respectively. Total PAHs concentration in liver and fish intestine was 141.23 AE 5.89 and 173.34 AE 4.677 μg/g respectively. Majority of the PAHs congeners were found to be higher than the acceptable limits. Findings from this study shows the need for continuous monitoring of our natural waters as the present situation portends a potential concern for ecological risk.

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Section: Discussionmentioning

confidence: 99%

Bioaccumulation of BTEX and PAHs in Heterotis niloticus (Actinopterygii) from the Epe Lagoon, Lagos, Nigeria

Akinsanya

Ayanda

Onwuka

et al. 2020

Heliyon

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“…Nevertheless, this process is a recurrent challenge regarding volatile organic compounds (VOCs) due to their highly volatile nature and persistency in the environment [15]. Phenol, for example, is highly toxic even at low concentrations [16] and the exposure to pollutants such as benzene and xylene for long periods of time leads to several negative effects on human health, from skin irritation to cancer and liver lesions [17]. Regarding heavy metals, their non-degradability leads to their perseverance in the environment, while their bioavailability allows easy incorporation in the food chain.…”

Section: Introductionmentioning

confidence: 99%

Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants

et al. 2019

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Serious environmental and health problems arise from the everyday release of industrial wastewater effluents. A wide range of pollutants, such as volatile organic compounds, heavy metals or textile dyes, may be efficiently removed by silica materials advanced solutions such as aerogels. This option is related to their exceptional characteristics that favors the adsorption of different contaminants. The aerogels performance can be selectively tuned by an appropriate chemical or physical modification of the aerogel’s surface. Therefore, the introduction of amine groups enhances the affinity between different organic and inorganic contaminants and the silica aerogels. In this work, different case studies are reported to investigate and better understand the role of these functional groups in the adsorption process, since the properties of the synthesized aerogels were significantly affected, regarding their microstructure and surface area. In general, an improvement of the removal efficiency after functionalization of aerogels with amine groups was found, with removal efficiencies higher than 90% for lead and Rubi Levafix CA. To explain the adsorption mechanism, both Langmuir and Freundlich models were applied; chemisorption is most likely the sorption type taking place in the studied cases.

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“…In developing regions/countries, where municipal water treatment systems are dysfunctional or non‐existent, BTEX compounds are often overlooked, thus increasing the risk of intake by humans, thereby resulting in the number of water‐related diseases (WHO, 2008; Fayemiwo et al , 2017). To ensure the realization of the United Nations Sustainable Development Goals (SDGs), there is an urgent need to develop a cost‐effective and efficient wastewater treatment methods and materials to remove BTEX from contaminated water sources in order to provide cheap and potable clean water for all.…”

Section: Introductionmentioning

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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Review: <i>BTEX compounds in water – future trends and directions for water treatment</i>

Cited by 55 publications

References 98 publications

Bioaccumulation of BTEX and PAHs in Heterotis niloticus (Actinopterygii) from the Epe Lagoon, Lagos, Nigeria

Bioaccumulation of BTEX and PAHs in Heterotis niloticus (Actinopterygii) from the Epe Lagoon, Lagos, Nigeria

Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants

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

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