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Functional Nanostructured Adsorbents and Its Application in Wastewater

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A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Environmental Nanoscience and Nanotechnology".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 5022

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Prof. Dr. Yalei Zhang

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State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Institute of Engineering and Industry, Tongji University, Shanghai, China
Interests: energy regeneration and resource recovery from wastewater; wastewater treatment by advanced environmental functional materials (nanomaterials and environmental nanotechnologies); environmental fate of emerging pollutants/micropollutants; occurrence, fate and removal of pharmaceuticals and personal care products (PPCPs) in the aquatic environment

Special Issue Information

Dear Colleagues,

The study of functional nanostructured adsorbents and their application is now one of the leading hot topics in wastewater research. As functional nanostructured adsorbents have an incredibly large surface area and unique physicochemical properties, their pollutant adsorption capability is typically high and of present interest. For applications, these nanoparticles or nanoparticles-supported functional materials were used to adsorb various pollutants, e.g., heavy metals, antibiotics, polycyclic aromatic hydrocarbons (PAHs), and other pharmaceuticals and personal care products (PPCPs). These functional nanostructured materials were further decorated to modify the surface structure to improve their functional adsorption capacity of pollutants or to avoid the agglomeration of the nanoparticles.

This Special Issue of Nanomaterials focuses on presenting the latest theoretical developments and practical applications of functional nanostructured materials in wastewater treatment, which is a research field that has blossomed since the 1990s. It aims to attract both academic and industrial researchers to contribute original research articles and present their recent progress on functional nanostructured adsorbents. Potential topics include, but are not limited to, the following:

Synthesis of functional nanostructured adsorbents;
Chemical modifications of nanostructured adsorbents;
Nano zero valent iron (nZVI) for wastewater treatment;
Adsorptive resource recovery by nanostructured adsorbents;
Recycling of nanostructured adsorbents in wastewater treatment;
Adsorption behaviors of nanoplastics in wastewater.

Prof. Dr. Yalei Zhang
Guest Editor

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Keywords

adsorption
wastewater treatment
adsorbent
nanomaterials
nanostructured
nanoplastics
heavy metals
antibiotics
PPCPs

Published Papers (4 papers)

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Research

17 pages, 2967 KiB

Open AccessArticle

Adsorption of Congo Red and Methylene Blue onto Nanopore-Structured Ashitaba Waste and Walnut Shell-Based Activated Carbons: Statistical Thermodynamic Investigations, Pore Size and Site Energy Distribution Studies

by Lei Zhang, Libin Yang, Jiabin Chen, Wenjun Yin, Yalei Zhang, Xuefei Zhou, Feng Gao and Jiang Zhao

Nanomaterials 2022, 12(21), 3831; https://doi.org/10.3390/nano12213831 - 29 Oct 2022

Cited by 12 | Viewed by 1555

Abstract

In this paper, an advanced statistical physics adsorption model (double-layer model with two energies) is successfully established. On the basis of this model, statistical thermodynamic functions (e.g., entropy (S), Gibbs free enthalpy (G), and internal energy (E_int)), pore size distribution (PSD), and site energy distribution (SED) functions were successfully developed and applied to investigate the adsorption mechanisms of nanopore-structured ashitaba waste-based activated carbons (AWAC) and walnut shell-based activated carbons (WSAC) on Congo red (CR) and methylene blue (MB) dyes in aqueous solutions. Statistical thermodynamic results indicated that the adsorption reactions involved in this study are entropy-increasing, endothermic, and spontaneous in nature. Furthermore, PSD and SED described the heterogeneity of these adsorbents in terms of geometry or structure and energy and illustrated that the aforementioned adsorption processes are endothermic physisorption. All in all, this study contributed to broadening the understanding of the adsorption mechanisms of dye molecules onto biomass-based activated carbons. Full article

(This article belongs to the Special Issue Functional Nanostructured Adsorbents and Its Application in Wastewater)

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16 pages, 4027 KiB

Open AccessArticle

Sulfide-Doped Magnetic Carbon Nanotubes Developed as Adsorbent for Uptake of Tetracycline and Cefixime from Wastewater

by Hassan Sereshti, Elahe Beyrak-Abadi, Mehdi Esmaeili Bidhendi, Irfan Ahmad, Syed Shahabuddin, Hamid Rashidi Nodeh, Nanthini Sridewi and Wan Nazihah Wan Ibrahim

Nanomaterials 2022, 12(20), 3576; https://doi.org/10.3390/nano12203576 - 12 Oct 2022

Cited by 9 | Viewed by 1523

Abstract

In this study, a magnetic solid-phase extraction method was developed based on multi-wall carbon nanotubes decorated by magnetic nanoparticles (Fe₃O₄) and cadmium sulfide nanoparticles (Fe₃O₄@MWCNT-CdS) for trace extraction of cefixime and tetracycline antibiotics from urine and drug company wastewater. The adsorbent features were characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), and energy dispersive X-ray analysis (EDX). Various effective parameters on the sorption and desorption cycle, such as sorption time, the mass of adsorbent, pH, salt addition, and material ratio, were investigated and optimized. The data were evaluated using isotherm models, and experimental data were well-fitted to both Langmuir (R² = 0.975) and Freundlich (R² = 0.985) models. Moreover, kinetic of reaction was agreement with pseudo-second-order (R² = 0.999) as compared pseudo-first-order (R² = 0.760). The maximum adsorption capacity for tetracycline and cefixime was achieved at 116.27 and 105.26 mg·g⁻¹, respectively. Hence, the prepared adsorbent can be used as an alternative material for enhanced determination of pharmaceutical substances in biological fluids. Full article

(This article belongs to the Special Issue Functional Nanostructured Adsorbents and Its Application in Wastewater)

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18 pages, 4657 KiB

Open AccessArticle

Adsorption of Mercury on Oxidized Graphenes

by Talia Tene, Stefano Bellucci, Marco Guevara, Fabian Arias Arias, Miguel Ángel Sáez Paguay, John Marcos Quispillo Moyota, Melvin Arias Polanco, Andrea Scarcello, Cristian Vacacela Gomez, Salvatore Straface, Lorenzo S. Caputi and F. Javier Torres

Nanomaterials 2022, 12(17), 3025; https://doi.org/10.3390/nano12173025 - 31 Aug 2022

Cited by 10 | Viewed by 1757

Abstract

Graphene oxide (GO) and its reduced form, reduced graphene oxide (rGO), are among the most predominant graphene derivatives because their unique properties make them efficient adsorbent nanomaterials for water treatment. Although extra-functionalized GO and rGO are customarily employed for the removal of pollutants from aqueous solutions, the adsorption of heavy metals on non-extra-functionalized oxidized graphenes has not been thoroughly studied. Herein, the adsorption of mercury(II) (Hg(II)) on eco-friendly-prepared oxidized graphenes is reported. The work covers the preparation of GO and rGO as well as their characterization. In a further stage, the description of the adsorption mechanism is developed in terms of the kinetics, the associated isotherms, and the thermodynamics of the process. The interaction between Hg(II) and different positions of the oxidized graphene surface is explored by DFT calculations. The study outcomes particularly demonstrate that pristine rGO has better adsorbent properties compared to pristine GO and even other extra-functionalized ones. Full article

(This article belongs to the Special Issue Functional Nanostructured Adsorbents and Its Application in Wastewater)

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17 pages, 4487 KiB

Open AccessArticle

Efficient Activation of Peroxymonosulfate by Biochar-Loaded Zero-Valent Copper for Enrofloxacin Degradation: Singlet Oxygen-Dominated Oxidation Process

by Jiang Zhao, Tianyin Chen, Cheng Hou, Baorong Huang, Jiawen Du, Nengqian Liu, Xuefei Zhou and Yalei Zhang

Nanomaterials 2022, 12(16), 2842; https://doi.org/10.3390/nano12162842 - 18 Aug 2022

Cited by 7 | Viewed by 1621

Abstract

The removal of contaminants of emerging concern (CECs) has become a hot research topic in the field of environmental engineering in recent years. In this work, a simple pyrolysis method was designed to prepare a high-performance biochar-loaded zero-valent copper (CuC) material for the catalytic degradation of antibiotics ENR by PMS. The results showed that 10 mg/L of ENR was completely removed within 30 min at an initial pH of 3, CuC 0.3 g/L, and PMS 2 mmol/L. Further studies confirmed that the reactive oxygen species (ROS) involved in ENR degradation are ·OH,

{S O}_{4}^{-}

·, ¹O₂, and

O_{2}^{-}

. Among them, ¹O₂ played a major role in degradation, whereas

O_{2}^{-}

· played a key role in the indirect generation of ¹O₂. On the one hand, CuC adsorbed and activated PMS to generate ·OH,

{SO}_{4}^{-}

· and

O_{2}^{-}

·.

O_{2}^{-}

· was unstable and reacted rapidly with H₂O and ·OH to generate large amounts of ¹O₂. On the other hand, both the self-decomposition of PMS and direct activation of PMS by C=O on biochar also generated ¹O₂. Five byproducts were generated during degradation and eventually mineralized to CO₂, H₂O,

{N O}_{3}^{-}

, and F⁻. This study provides a facile strategy and new insights into the biochar-loaded zero-valent transition-metal-catalyzed PMS degradation of CECs. Full article

(This article belongs to the Special Issue Functional Nanostructured Adsorbents and Its Application in Wastewater)

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