Graphene-family nanomaterials in wastewater treatment plants

Suárez-Iglesias, Octavio; Collado, Sergio; Oulego, Paula; Dı́az, Mario

doi:10.1016/j.cej.2016.12.022

Cited by 127 publications

(46 citation statements)

References 108 publications

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“…It seems plausible that sedimentation plays an important role for larger particles, and potentially also for smaller particles after aggregation. Like demonstrated for graphene nanomaterials, the addition of a suitable coagulant may reduce the particles from the wastewater stream [ 118 ]. The application of tertiary treatment techniques such as UV radiation and oxidation techniques are also likely to remove wear and tear particles from the water phase.…”

Section: Mitigationmentioning

confidence: 99%

Wear and Tear of Tyres: A Stealthy Source of Microplastics in the Environment

Kole

Löhr

Belleghem

et al. 2017

IJERPH

896

463

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Wear and tear from tyres significantly contributes to the flow of (micro-)plastics into the environment. This paper compiles the fragmented knowledge on tyre wear and tear characteristics, amounts of particles emitted, pathways in the environment, and the possible effects on humans. The estimated per capita emission ranges from 0.23 to 4.7 kg/year, with a global average of 0.81 kg/year. The emissions from car tyres (100%) are substantially higher than those of other sources of microplastics, e.g., airplane tyres (2%), artificial turf (12–50%), brake wear (8%) and road markings (5%). Emissions and pathways depend on local factors like road type or sewage systems. The relative contribution of tyre wear and tear to the total global amount of plastics ending up in our oceans is estimated to be 5–10%. In air, 3–7% of the particulate matter (PM2.5) is estimated to consist of tyre wear and tear, indicating that it may contribute to the global health burden of air pollution which has been projected by the World Health Organization (WHO) at 3 million deaths in 2012. The wear and tear also enters our food chain, but further research is needed to assess human health risks. It is concluded here that tyre wear and tear is a stealthy source of microplastics in our environment, which can only be addressed effectively if awareness increases, knowledge gaps on quantities and effects are being closed, and creative technical solutions are being sought. This requires a global effort from all stakeholders; consumers, regulators, industry and researchers alike.

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Section: Mitigationmentioning

confidence: 99%

Wear and Tear of Tyres: A Stealthy Source of Microplastics in the Environment

Kole

Löhr

Belleghem

et al. 2017

IJERPH

896

463

View full text Add to dashboard Cite

show abstract

“…In a broader way, photocatalytic nanomaterials can be categorized in terms of dimensionality as zero-dimensional (nanoparticles [68] and quantum dots [69]), one-dimensional (nanorods [70,71], nanoribbons [72], and nanotubes [4,72]), two-dimensional (graphene bases nanocomposites) [66,73,74], or three-dimensional (3D graphene) [21,75,76]. The choice of morphology depends upon the targeted application, as well as the desired properties.…”

Section: Application Of Heterogeneous Photocatalysis For Water and Wamentioning

confidence: 99%

“…Carbon-based nanomaterials. Carbon-based nanomaterials include graphene, graphene oxide, reduced graphene oxide, fullerene, single and multi-walled carbon nanotubes [74]. Graphene, since its discovery in 2004 [23], has particularly received the most attention among the carbon-based nanomaterials.…”

Section: Visible Light Responsive Tio 2 Several Studies Havementioning

confidence: 99%

Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review

2018

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There has been a considerable amount of research in the development of sustainable water treatment techniques capable of improving the quality of water. Unavailability of drinkable water is a crucial issue especially in regions where conventional drinking water treatment systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The research and development in this area have given rise to a new class of processes called advanced oxidation processes, particularly in the form of heterogeneous photocatalysis, which converts photon energy into chemical energy. Advances in nanotechnology have improved the ability to develop and specifically tailor the properties of photocatalytic materials used in this area. This paper discusses many of those photocatalytic nanomaterials, both metal-based and metal-free, which have been studied for water and waste water purification and treatment in recent years. It also discusses the design and performance of the recently studied photocatalytic reactors, along with the recent advancements in the visible-light photocatalysis. Additionally, the effects of the fundamental parameters such as temperature, pH, catalyst-loading and reaction time have also been reviewed. Moreover, different techniques that can increase the photocatalytic efficiency as well as recyclability have been systematically presented, followed by a discussion on the photocatalytic treatment of actual wastewater samples and the future challenges associated with it.

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“…Additionally, it exhibits good dispersibility and an excellent adsorption force in water [27,28]. The most significant technical challenge of applying GO for adsorption is the difficulty of solid-liquid separation after adsorption; the separation is performed with ultrahigh-speed centrifuges, but it takes a long time to collect the GO, which is highly dispersed in water [29]. To resolve the aforementioned shortcomings, the GO adsorption mainly focuses on introducing magnetic separation technology to GO, that is, solving the solid-liquid separation problem through the synthesis of hybrid materials containing magnetic nanoparticles [30].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Performance for Reactive Blue 221 Dye of β-Chitosan/Polyamine Functionalized Graphene Oxide Hybrid Adsorbent with High Acid–Alkali Resistance Stability in Different Acid–Alkaline Environments

Chiu

Lin

et al. 2020

Nanomaterials

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A hybrid material obtained by blending β-chitosan (CS) with triethylenetetramine-functionalized graphene oxide (TFGO) (CSGO), was used as an adsorbent for a reactive dye (C.I. Reactive Blue 221 Dye, RB221), and the adsorption and removal performances of unmodified CS and mix-modified CSGO were investigated and compared systematically at different pH values (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12). The adsorption capacities of CS and CSGO were 45.5 and 56.1 mg/g, respectively, at a pH of 2 and 5.4 and 37.2 mg/g, respectively, at a pH of 12. This indicates that TFGO was successfully introduced into CSGO, enabling π–π interactions and electrostatic attraction with the dye molecules. Additionally, benzene ring-shaped GO exhibited a high surface chemical stability, which was conducive to maintaining the stability of the acid and alkali resistance of the CSGO adsorbent. The RB221 adsorption performance of CS and CSGO at acidic condition (pH 3) and alkaline condition (pH 12) and different temperatures was investigated by calculating the adsorption kinetics and isotherms of adsorbents. Overall, the adsorption efficiency of CSGO was superior to that of CS; thus, CSGO is promising for the treatment of dye effluents in a wide pH range.

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Graphene-family nanomaterials in wastewater treatment plants

Cited by 127 publications

References 108 publications

Wear and Tear of Tyres: A Stealthy Source of Microplastics in the Environment

Wear and Tear of Tyres: A Stealthy Source of Microplastics in the Environment

Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review

Adsorption Performance for Reactive Blue 221 Dye of β-Chitosan/Polyamine Functionalized Graphene Oxide Hybrid Adsorbent with High Acid–Alkali Resistance Stability in Different Acid–Alkaline Environments

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