Submit to Molecules Review for Molecules Propose a Special Issue

Journal Browser

► Journal Browser

Materials in the Application of Wastewater Treatment and Adsorption

Special Issue Editors
Special Issue Information
Keywords
Published Papers

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 3809

Share This Special Issue

Special Issue Editors

Dr. Manoj P. Rayaroth

E-Mail Website
Guest Editor

Department of Environmental Science, School of Science, GITAM (Deemed to be University), Visakhapatnam 530045, India
Interests: wastewater treatment; cavitation; advanced oxidation process; water pollution; emerging pollutants; mass spectrometry; zerovalent iron; persulfate

Prof. Dr. Charuvila T. Aravindakumar

E-Mail Website
Guest Editor

1. School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, India
2. Inter-University Instrumentation Centre, Mahatma Gandhi University, Kottayam 686560, India
Interests: emerging contaminants; advanced oxidation process; mass spectrometry; membrane technology; radiation photochemistry; computational chemistry
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Usha K Aravind

E-Mail Website
Guest Editor

School of Environmental Studies, Cochin University of Science and Technology, Kochi 682022, India
Interests: membranes for water purification; low-pressure filtrations; screening of water and air pollutants; advanced oxidation processes (for the degradation of organic pollutants); the interaction of contaminants with biomacromoleucles

Special Issue Information

Dear Colleagues,

There are many contaminants detected in the environmental matrices and it become a concern worldwide. Most of these contaminants are released from the products used in our daily life. These are pharmaceuticals, personal care products, industrial chemicals, plasticizers, pesticides, flame retardants, etc. Hence, there is an urgent requirement for an effective method for pollutant removal. There are different kinds of materials used in this aspect since the pollutant can be removed by adsorption, oxidation, ion exchange, and so on depending on their properties. The materials include many bio-materials, metal oxides, zerovalent iron, semiconductors, and their composites, and many carbon-based materials. In addition, these materials are also used in other water treatment methods such as oxidation and filtration processes. Some of the materials are also used to activate some oxidants and the subsequent degradation of pollutants. Hence this special issue invites critical reviews, and research articles on various materials in water treatment applications, and their challenges in implementing in the real scale applications.

Dr. Manoj P. Rayaroth
Prof. Dr. Charuvila T. Aravindakumar
Prof. Dr. Usha K Aravind
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

emerging materials in the water treatment applications
photocatalysis
materials in the membrane filtration
new materials for oxidant activation
aquifer clean up

Published Papers (3 papers)

Download All Papers

Research

21 pages, 2921 KiB

Open AccessArticle

Steric and Energetic Studies on the Synergetic Enhancement Effect of Integrated Polyaniline on the Adsorption Properties of Toxic Basic and Acidic Dyes by Polyaniline/Zeolite-A Composite

by Ayah T. Zaidalkilani, Amna M. Farhan, Islam R. Sayed, Ahmed M. El-Sherbeeny, Wail Al Zoubi, Ammar Al-Farga and Mostafa R. Abukhadra

Molecules 2023, 28(20), 7168; https://doi.org/10.3390/molecules28207168 - 19 Oct 2023

Viewed by 1015

Abstract

The synergetic enhancement effect of the polyaniline (PANI) integration process on the adsorption properties of the PANI/zeolite-A composite (PANI/ZA) as an adsorbent for malachite green and Congo red synthetic dyes was evaluated based on classic equilibrium modelling in addition to the steric and energetic parameters of advanced isotherm studies. The PANI/ZA composite displays enhanced adsorption capacities for both methylene blue (270.9 mg/g) and Congo red (235.5 mg/g) as compared to ZA particles (methylene blue (179.6 mg/g) and Congo red (140.3 mg/g)). The reported enhancement was illustrated based on the steric parameters of active site density (Nm) and the number of adsorbed dyes per active site (n). The integration of PANI strongly induced the quantities of the existing active sites that have enhanced affinities towards both methylene blue (109.2 mg/g) and Congo red (92.9 mg/g) as compared to the present sites on the surface of ZA. Every site on the surface of PANI/ZA can adsorb about four methylene blue molecules and five Congo red molecules, signifying the vertical orientation of their adsorbed ions and their uptake by multi-molecular mechanisms. The energetic investigation of the methylene blue (−10.26 to −16.8 kJ/mol) and Congo red (−9.38 to −16.49 kJ/mol) adsorption reactions by PANI/ZA suggested the operation of physical mechanisms during their uptake by PANI/ZA. These mechanisms might involve van der Waals forces, dipole bonding forces, and hydrogen bonding (<30 kJ/mol). The evaluated thermodynamic functions, including enthalpy, internal energy, and entropy, validate the exothermic and spontaneous behaviours of the methylene blue and Congo red uptake processes by PANI/ZA. Full article

(This article belongs to the Special Issue Materials in the Application of Wastewater Treatment and Adsorption)

► Show Figures

Figure 1

18 pages, 6126 KiB

Open AccessArticle

Synthesis of Porous MgAl-LDH on a Micelle Template and Its Application for Efficient Treatment of Oilfield Wastewater

by Bingbing Bai, Qingchen Wang, Yan Sun, Rui Zhou, Gang Chen and Ying Tang

Molecules 2023, 28(18), 6638; https://doi.org/10.3390/molecules28186638 - 15 Sep 2023

Cited by 3 | Viewed by 696

Abstract

In this paper, a series of porous hierarchical Mg/Al layered double hydroxides (named as LDH, TTAC-MgAl-LDH, CTAC-MgAl-LDH, and OTAC-MgAl-LDH) was synthesized by a simple green hydrothermal method using wormlike micelles formed by salicylic acid and surfactants with different carbon chain lengths (0, 14, 16, and 18) as soft templates. BET, XRD, FTIR, TG, and SEM characterizations were carried out in order to investigate the structure and properties of the prepared materials. The results showed that the porous hierarchical CTAC-MgAl-LDH had a large specific surface area and multiple pore size distributions which could effectively increase the reaction area and allow better absorption capability. Benefiting from the unique architecture, CTAC-MgAl-LDH exhibited a large adsorption capacity for sulfonated lignite (231.70 mg/g) at 25 °C and a pH of 7, which outperformed the traditional LDH (86.05 mg/g), TTAC-MgAl-LDH (108.15 mg/g), and OTAC-MgAl-LDH (110.51 mg/g). The adsorption process of sulfonated lignite followed the pseudo-second-order kinetics model and conformed the Freundlich isotherm model with spontaneous heat absorption, which revealed that electrostatic adsorption and ion exchange were the main mechanisms of action for the adsorption. In addition, CTAC-MgAl-LDH showed a satisfactory long-time stability and its adsorption capacities were still as high as 198.64 mg/g after two adsorption cycles. Full article

(This article belongs to the Special Issue Materials in the Application of Wastewater Treatment and Adsorption)

► Show Figures

Figure 1

20 pages, 3823 KiB

Open AccessArticle

Materials Derived from Olive Pomace as Effective Bioadsorbents for the Process of Removing Total Phenols from Oil Mill Effluents

by Fatouma Mohamed Abdoul-Latif, Ayoub Ainane, Touria Hachi, Rania Abbi, Meryem Achira, Abdelmjid Abourriche, Mathieu Brulé and Tarik Ainane

Molecules 2023, 28(11), 4310; https://doi.org/10.3390/molecules28114310 - 24 May 2023

Cited by 3 | Viewed by 1723

Abstract

This work investigates olive pomace from olive mill factories as an adsorbent for the removal of total phenols from olive mill effluent (OME). This pathway of valorization of olive pomace reduces the environmental impact of OME while providing a sustainable and cost-effective wastewater treatment approach for the olive oil industry. Olive pomace was pretreated with water washing, drying (60 °C) and sieving (<2 mm) to obtain the raw olive pomace (OPR) adsorbent material. Olive pomace biochar (OPB) was obtained via carbonization of OPR at 450 °C in a muffle furnace. The adsorbent materials OPR and OPB were characterized using several basic analyzes (Scanning Electron Microscopy–Energy-Dispersive X-ray SEM/EDX, X-ray Diffraction XRD, thermal analysis DTA and TGA, Fourier transform infrared FTIR and Brunauer, Emmett and Teller surface BET). The materials were subsequently tested in a series of experimental tests to optimize the sorption of polyphenols from OME, investigating the effects of pH and adsorbent dose. Adsorption kinetics showed good correlation with a pseudo-second-order kinetic model as well as Langmuir isotherms. Maximum adsorption capacities amounted to 21.27 mg·g⁻¹ for OPR and 66.67 mg·g⁻¹ for OPB, respectively. Thermodynamic simulations indicated spontaneous and exothermic reaction. The rates of total phenol removal were within the range of 10–90% following 24 h batch adsorption in OME diluted at 100 mg/L total phenols, with the highest removal rates observed at pH = 10. Furthermore, solvent regeneration with 70% ethanol solution yielded partial regeneration of OPR at 14% and of OPB at 45% following the adsorption, implying a significant rate of recovery of phenols in the solvent. The results of this study suggest that adsorbents derived from olive pomace may be used as economical materials for the treatment and potential capture of total phenols from OME, also suggesting potential further applications for pollutants in industrial wastewaters, which can have significant implications in the field of environmental technologies. Full article

(This article belongs to the Special Issue Materials in the Application of Wastewater Treatment and Adsorption)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Materials in the Application of Wastewater Treatment and Adsorption

Share This Special Issue

Special Issue Editors

Special Issue Information

Keywords

Published Papers (3 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI