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Molecules
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The Porous Materials Absorb and Remove Organic Pollutants
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The Porous Materials Absorb and Remove Organic Pollutants

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 2977

Special Issue Editors

Dr. Wei Wang

E-Mail Website
Guest Editor
School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
Interests: mineral material; clay nanosheet; polymer chemistry; hydrogel; self-assembly; wastewater treatment
Dr. Ling Zhang

E-Mail Website
Guest Editor
School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
Interests: surface forces; interfacial chemistry; asphaltenes; emulsions; oily sludge treatment; wastewater treatment
Dr. Renji Zheng

E-Mail Website
Guest Editor
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Interests: mineral material; semiconductor mineral; DFT calculation; catalysis; wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Porous materials, with special pore structures and surface properties, have been found to efficiently adsorb and remove organic pollutants from water, making them important materials for solving water pollution problems. This Special Issue of Molecules, entitled “The Porous Materials Absorb and Remove Organic Pollutants”, aims to publish papers discussing the recent progress made in the development of novel porous materials, such as porous mineral, hydrogels, polymer composites, organic/inorganic frameworks, etc., with applications in the adsorption and removal of organic pollutants. We are eager to publish submissions detailing experimental research, theoretical research, application research, and review articles are welcome. The goal of this Special Issue is to provide a platform for academic communication in the field of the adsorption and removal of organic pollutants by porous materials, thereby promoting the further development and practical implementation of these methods.

Dr. Wei Wang
Dr. Ling Zhang
Dr. Renji Zheng
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

  • porous materials
  • hydrogel
  • polymer
  • structure regulation
  • adsorption
  • organic pollutants

Published Papers (3 papers)

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Research

16 pages, 5851 KiB  
Article
Behaviors and Mechanisms of Adsorption of MB and Cr(VI) by Geopolymer Microspheres under Single and Binary Systems
by Yi Fang, Lang Yang, Feng Rao, Kaiming Zhang, Zhuolin Qin, Zhenguo Song and Zhihui Na
Molecules 2024, 29(7), 1560; https://doi.org/10.3390/molecules29071560 - 30 Mar 2024
Viewed by 748
Abstract
Geopolymers show great potential in complex wastewater treatment to improve water quality. In this work, general geopolymers, porous geopolymers and geopolymer microspheres were prepared by the suspension curing method using three solid waste products, coal gangue, fly ash and blast furnace slag. The [...] Read more.
Geopolymers show great potential in complex wastewater treatment to improve water quality. In this work, general geopolymers, porous geopolymers and geopolymer microspheres were prepared by the suspension curing method using three solid waste products, coal gangue, fly ash and blast furnace slag. The microstructure, morphology and surface functional groups of the geopolymers were studied by SEM, XRD, XRF, MIP, FTIR and XPS. It was found that the geopolymers possess good adsorption capacities for both organic and inorganic pollutants. With methylene blue and potassium dichromate as the representative pollutants, in order to obtain the best removal rate, the effects of the adsorbent type, dosage of adsorbent, concentration of methylene blue and potassium dichromate and pH on the adsorption process were studied in detail. The results showed that the adsorption efficiency of the geopolymers for methylene blue and potassium dichromate was in the order of general geopolymers < porous geopolymers < geopolymer microspheres, and the removal rates were up to 94.56% and 79.46%, respectively. Additionally, the competitive adsorption of methylene blue and potassium dichromate in a binary system was also studied. The mechanism study showed that the adsorption of methylene blue was mainly through pore diffusion, hydrogen bond formation and electrostatic adsorption, and the adsorption of potassium dichromate was mainly through pore diffusion and redox reaction. These findings demonstrate the potential of geopolymer microspheres in adsorbing organic and inorganic pollutants, and, through five cycles of experiments, it is demonstrated that MGP exhibits excellent recyclability. Full article
(This article belongs to the Special Issue The Porous Materials Absorb and Remove Organic Pollutants)
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13 pages, 5276 KiB  
Article
Efficient Degradation of Ciprofloxacin in Water over Copper-Loaded Biochar Using an Enhanced Non-Radical Pathway
by Ting Guo, Qinyu Yang, Ruoqi Qiu, Jie Gao, Jingzhuan Shi, Xiaoyun Lei and Zuoping Zhao
Molecules 2023, 28(24), 8094; https://doi.org/10.3390/molecules28248094 - 14 Dec 2023
Viewed by 854
Abstract
The development of an efficient catalyst with excellent performance using agricultural biomass waste as raw materials is highly desirable for practical water pollution control. Herein, nano-sized, metal-decorated biochar was successfully synthesized with in situ chemical deposition at room temperature. The optimized BC-Cu (1:4) [...] Read more.
The development of an efficient catalyst with excellent performance using agricultural biomass waste as raw materials is highly desirable for practical water pollution control. Herein, nano-sized, metal-decorated biochar was successfully synthesized with in situ chemical deposition at room temperature. The optimized BC-Cu (1:4) composite exhibited excellent peroxymonosulfate (PMS) activation performance due to the enhanced non-radical pathway. The as-prepared BC-Cu (1:4) composite displays a superior 99.99% removal rate for ciprofloxacin degradation (initial concentration 20 mg·L−1) within 40 min. In addition, BC-Cu (1:4) has superior acid-base adaptability (3.98~11.95) and anti-anion interference ability. The trapping experiments and identification of reactive oxidative radicals confirmed the crucial role of enhanced singlet oxygen for ciprofloxacin degradation via a BC-Cu (1:4)/PMS system. This work provides a new idea for developing highly active, low-cost, non-radical catalysts for efficient antibiotic removal. Full article
(This article belongs to the Special Issue The Porous Materials Absorb and Remove Organic Pollutants)
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17 pages, 6826 KiB  
Article
Synthesis of Porous Activated Carbon Doped with Tetramethylammonium Hydroxide: Evaluation of Excellent Gasoline Vapor Adsorption Performance and Activation Mechanism
by Chenyu Wu, Jing Yang, Yu Gong, Yongming Ju, Jiahui Tao and Xinmeng Jiang
Molecules 2023, 28(15), 5868; https://doi.org/10.3390/molecules28155868 - 04 Aug 2023
Viewed by 947
Abstract
The rapid urbanization and industrialization in China have led to an urgent dilemma for controlling urban air pollution, including the intensified emission of gasoline vapor into the atmosphere. Herein, we selected highland barley straw as a raw material and KOH and tetramethylammonium hydroxide [...] Read more.
The rapid urbanization and industrialization in China have led to an urgent dilemma for controlling urban air pollution, including the intensified emission of gasoline vapor into the atmosphere. Herein, we selected highland barley straw as a raw material and KOH and tetramethylammonium hydroxide (TMAOH) as activators to synthesize nitrogen-doped layered porous carbon (K-thAC) by a three-step activation method. The obtained K-thAC materials had a high specific surface area, reaching 3119 m2/g. Dynamic adsorption experiments demonstrated a superior adsorption capacity of up to 501 mg/g (K-thAC-25) for gasoline vapor compared with other documented carbon adsorbents. Moreover, adjusting the ratio of raw materials with a series of active ingredients could further improve the pore properties of the obtained K-thACs and their adsorption performance for gasoline vapor. Furthermore, the K-thAC materials were also characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), synchronous thermogravimetry (STA), X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption tests. This study synthesized a novel plant-based material to treat gasoline vapor pollution efficiently. Full article
(This article belongs to the Special Issue The Porous Materials Absorb and Remove Organic Pollutants)
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