Activated carbon/metal-organic framework nanocomposite: Preparation and photocatalytic dye degradation mathematical modeling from wastewater by least squares support vector machine

Mahmoodi, Niyaz Mohammad; Abdi, Jafar; Taghizadeh, Mohsen; Taghizadeh, Ali; Hayati, Bagher; Shekarchi, Ali Akbar; Vossoughi, Manouchehr

doi:10.1016/j.jenvman.2018.12.026

Cited by 128 publications

(27 citation statements)

References 65 publications

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“…On the other hand, the introduction of an appropriate method for dye wastewater refinement is essential for environmental scientists [14]. Absorption is one of the most common methods for removing artificial dyes from aqueous sewage systems due to its simplicity, economic effectiveness, and efficiency, as well as the wide range of absorbents that can be used [15,16]. In recent years, many porous materials, including activated carbon, carbon nanotubes, graphene, and zeolites, have been made and used to remove toxic dyes from the environment [17].…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

Hamedi

Trotta

Zarandi

et al. 2019

IJMS

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A new magnetic nanocomposite called MIL-100(Fe) @Fe3O4@AC was synthesized by the hydrothermal method as a stable adsorbent for the removal of Rhodamine B (RhB) dye from aqueous medium. In this work, in order to increase the carbon uptake capacity, magnetic carbon was first synthesized and then the Fe3O4 was used as the iron (III) supplier to synthesize MIL-100(Fe). The size of these nanocomposite is about 30–50 nm. Compared with activated charcoal (AC) and magnetic activated charcoal (Fe3O4@AC) nanoparticles, the surface area of MIL-100(Fe) @Fe3O4@AC were eminently increased while the magnetic property of this adsorbent was decreased. The surface area of AC, Fe3O4@AC, and MIL-100(Fe) @Fe3O4@AC was 121, 351, and 620 m2/g, respectively. The magnetic and thermal property, chemical structure, and morphology of the MIL-100(Fe) @Fe3O4@AC were considered by vibrating sample magnetometer (VSM), thermogravimetric analysis (TGA), zeta potential, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Brunner-Emmet-Teller (BET), and transmission electron microscopy (TEM) analyses. The relatively high adsorption capacity was obtained at about 769.23 mg/g compared to other adsorbents to eliminate RhB dye from the aqueous solution within 40 min. Studies of adsorption kinetics and isotherms showed that RhB adsorption conformed the Langmuir isotherm model and the pseudo second-order kinetic model. Thermodynamic amounts depicted that the RhB adsorption was spontaneous and exothermic process. In addition, the obtained nanocomposite exhibited good reusability after several cycles. All experimental results showed that MIL-100(Fe) @Fe3O4@AC could be a prospective sorbent for the treatment of dye wastewater.

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Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

Hamedi

Trotta

Zarandi

et al. 2019

IJMS

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“…This is because this method has shown good generalization ability, avoiding the problems of training overfitting that occur in other similar methods [29]. Recently, it has also been used in the field of wastewater treatment to predict different parameters of the treatment process [30][31][32][33][34][35][36][37].…”

Section: Methodsmentioning

confidence: 99%

Gross Solids Content Prediction in Urban WWTPs Using SVM

Pérez

Fernández

et al. 2021

Water

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The preliminary treatment of wastewater at wastewater treatment plants (WWTPs) is of great importance for the performance and durability of these plants. One fraction that is removed at this initial stage is commonly called gross solids and can cause various operational, downstream performance, or maintenance problems. To avoid this, data from more than two operation years of the Villapérez Wastewater Treatment Plant, located in the northeast of the city of Oviedo (Asturias, Spain), were collected and used to develop a model that predicts the gross solids content that reaches the plant. The support vector machine (SVM) method was used for modelling. The achieved model precision (Radj2 = 0.7 and MSE = 0.43) allows early detection of trend changes in the arrival of gross solids and will improve plant operations by avoiding blockages and overflows. The results obtained indicate that it is possible to predict trend changes in gross solids content as a function of the selected input variables. This will prevent the plant from suffering possible operational problems or discharges of untreated wastewater as actions could be taken, such as starting up more pretreatment lines or emptying the containers.

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“…Apart from inorganic semiconductors, integrating MOFs with conductive carbon materials is an effective approach to promote the migration rate of photogenerated carriers [12,221]. For example, composites obtained combining activated carbon (AC) with MIL-88B (Fe) MOF showed higher photocatalytic activity than bare components [266]. Furthermore, reduced graphene oxide (RGO) can be coupled to MOF frameworks, such as UiO-66(NH 2 ) [267] and RGO-MIL-53(Fe) [268] to improve their photocatalytic properties.…”

Section: Encapsulation Of Photocatalytic Active Species (Mof Compositmentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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Activated carbon/metal-organic framework nanocomposite: Preparation and photocatalytic dye degradation mathematical modeling from wastewater by least squares support vector machine

Cited by 128 publications

References 65 publications

In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

In Situ Synthesis of MIL-100(Fe) at the Surface of Fe3O4@AC as Highly Efficient Dye Adsorbing Nanocomposite

Gross Solids Content Prediction in Urban WWTPs Using SVM

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

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