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Molecules
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Solution Chemistry in Complex Wastewater Separation and Purification
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Solution Chemistry in Complex Wastewater Separation and Purification

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

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 1672

Special Issue Editors

Prof. Dr. Xiaobing Li

E-Mail Website
Guest Editor
National Center for Coal Preparation and Purification Engineering Research, China University of Mining and Technology, Xuzhou, China
Interests: solution chemistry; fluidization separation; wastewater treatment; air flotation; water-disposal reagents; industrial sites remediation
Prof. Dr. Jian Zhang

E-Mail Website
Guest Editor
Sinopec Petr Engn Corp., 49 Jinan Rd, Dongying 257026, China
Interests: oily wastewater treatment; corrosion inhibition; emulsion; flow pattern; pipeline corrosion
Dr. Hao Sun

E-Mail Website
Guest Editor
National Center for Coal Preparation and Purification Engineering Research, China University of Mining and Technology, Xuzhou, China
Interests: oil-water separation; adsorption; emulsion; interfacial chemistry; environmental function materials; groundwater remediation

Special Issue Information

Dear Colleagues,

The increasing demand for water resources, applied to different industries, such as mining, oil flooding, metallurgical and pharmaceutical engineering, is motivating the development of new strategies for wastewater treatment. Especially for the complex wastewater containing various contaminants like fine colloidal particles, organic matter and heavy metals, which need to be treated by a multistage treatment process. During this process, the solution chemistry environment is considered to be a dominant factor affecting the pollutants properties, process conditions and equipment operation efficiency, which is closely related to the pollutants separation and purification efficiency. Therefore, Molecules plans to publish the Special Issue titled "Solution Chemistry in Complex Wastewater Separation and Purification" in 2023. This Special Issue aims to disseminate recent research on the solution chemistry theory applied in complex wastewater treatment. Contributions on the integration of wastewater solution chemistry with the development of novel materials, water-disposal reagents, new techniques and processes are welcome.

Prof. Dr. Xiaobing Li
Prof. Dr. Jian Zhang
Dr. Hao Sun
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

  • water pollution control
  • solution environment
  • functional materials
  • water-disposal reagents
  • emulsions

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Published Papers (1 paper)

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Research

15 pages, 4290 KiB  
Article
Interfacial Interaction of Clay and Saturates in Petroleum-Contaminated Soil: Effect of Clay Surface Heterogeneity
by Yang Yang, Xing Liang and Xiaobing Li
Molecules 2022, 27(22), 7950; https://doi.org/10.3390/molecules27227950 - 17 Nov 2022
Cited by 1 | Viewed by 1347
Abstract
Petroleum-contaminated soil (PCS) exhibits a variety of oil–soil interfacial properties. Surface heterogeneity of soil particles is one of the most critical influencing aspects. The interaction energies of the heterogeneous surfaces of montmorillonite (Mnt) and kaolinite (Kln) for saturates adsorption were determined by molecular [...] Read more.
Petroleum-contaminated soil (PCS) exhibits a variety of oil–soil interfacial properties. Surface heterogeneity of soil particles is one of the most critical influencing aspects. The interaction energies of the heterogeneous surfaces of montmorillonite (Mnt) and kaolinite (Kln) for saturates adsorption were determined by molecular simulation to be −1698.88 ± 0.67 (001 surface of Mnt), −73.81 ± 0.51 (010 edge of Mnt), −3086.33 ± 0.46 (001 surface of Kln), and −850.17 ± 0.74 (010 edge of Kln) kJ/mol, respectively. The adsorption of both clays with saturates relied on van der Waals forces, and the edges of Mnt were hardly adsorbed with saturates. According to adhesive force measurements, the oil–clay interaction forces of Mnt and Kln were 111.18 ± 0.01 and 122.65 ± 0.03 μN, respectively. In agreement with the simulations, Kln adsorbed saturates more strongly. Dynamic interfacial rheology and liquid viscoelasticity also revealed differences in adsorption behaviors between Mnt–saturates and Kln–saturates. It demonstrated that in the case of relatively low clay concentrations, the impact of particle surface heterogeneity on the adsorption process was stronger than that of structure even though Mnt had multilayer structures. Moreover, in thermodynamic adsorption experiments, it was evident that Kln adsorbed more oil than Mnt at the adsorption equilibrium states even though both were multilayer adsorptions and the adsorption amounts declined with increasing temperature. Simultaneously, the characteristics of the thermal adsorption of clay and saturates with different proportions were consistent with clay dispersion in saturates, and Kln released more heat being combined with oil. Overall, the heterogeneity of clay particles strongly affects the oil–clay interfacial chemical behaviors, causing more difficulty in treating PCS containing Kln than those containing Mnt. These results provide a theoretical basis for PCS treatment technology. Full article
(This article belongs to the Special Issue Solution Chemistry in Complex Wastewater Separation and Purification)
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