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IJERPH
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State-of-the-Art Research of Soil and Groundwater Remediation
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State-of-the-Art Research of Soil and Groundwater Remediation

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Environmental Earth Science and Medical Geology".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 3702

Special Issue Editors

Dr. Tinggang Li

E-Mail Website
Guest Editor
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Interests: energy, resource and environmental direct biotechnology; biofilm technology; bioremediation of soil, sediments, and groundwater; biomass to bioenergy and value-added biochemicals; green synthesis of catalytic functional materials
Special Issues, Collections and Topics in MDPI journals
Dr. Zedong Teng

E-Mail Website
Guest Editor
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Interests: elemental biogeochemical cycles; environmental behavior and effects of pollutants; resource utilization of waste; green synthesis of functional materials

Special Issue Information

Dear Colleagues,

Soil and groundwater contamination by heavy metals and organic pollutants has been a topic of significant concern for human health and environmental quality. Therefore, it is imperative to develop and deploy innovative and specific remediation strategies for efficient clean-up of contaminations in soil and groundwater, ensuring soil and groundwater safety at technical and institutional levels.

An exciting new Special Issue entitled “State-of-the-Art Research of Soil and Groundwater Remediation” in the International Journal of Environmental Research and Public Health, a journal published by MDPI, is open for submissions, and we would like to invite you to contribute to it. The Special Issue accepts research on new remediation methods, especially physical, chemical, biological, and combined remediation methods, and how these impact the environment of soil and groundwater. We would be delighted if you would accept our invitation to submit a research or review article to this Special Issue. 

Dr. Tinggang Li
Dr. Zedong Teng
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. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly 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 2500 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

  • soil remediation
  • soil improvement
  • groundwater remediation
  • heavy metal
  • organic pollutants
  • site contamination
  • remediation strategy

Published Papers (2 papers)

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Research

14 pages, 3140 KiB  
Article
Quantification of the Influence of Citrate/Fe(II) Molar Ratio on Hydroxyl Radical Production and Pollutant Degradation during Fe(II)-Catalyzed O2 and H2O2 Oxidation Processes
by Bingbing Hu, Peng Zhang, Hui Liu and Songhu Yuan
Int. J. Environ. Res. Public Health 2022, 19(19), 12977; https://doi.org/10.3390/ijerph191912977 - 10 Oct 2022
Cited by 3 | Viewed by 1676
Abstract
Ligand-enhanced hydroxyl radical (•OH) production is an important strategy for Fe(II)-catalyzed O2 and H2O2 oxidation processes. However, the influence of the molar ratio of ligands to Fe(II) on •OH production remains elusive. This study employed citrate and inorganic dissolved [...] Read more.
Ligand-enhanced hydroxyl radical (•OH) production is an important strategy for Fe(II)-catalyzed O2 and H2O2 oxidation processes. However, the influence of the molar ratio of ligands to Fe(II) on •OH production remains elusive. This study employed citrate and inorganic dissolved Fe(II) (Fe(II)dis) as the representative ligand and Fe(II) species, respectively, to quantify this relationship. Results showed that •OH production was highly dependent on the citrate/Fe(II) molar ratio. For instance, for the oxygenation of Fe(II)dis, the •OH accumulations were 2.0–8.5, 3.4–28.5 and 8.1–42.3 μM at low (0.25–0.5), moderate (0.5–1), and high (1–2) citrate/Fe(II) molar ratios, respectively. At low citrate/Fe(II) molar ratio (<0.5), inorganic Fe(II)dis mainly contributed to •OH production, with the increase in the citrate/Fe(II) molar ratio to a high level (1–2), Fe(II)-citrate complex turned to the electron source for •OH production. The change in Fe(II) speciation with the increase of citrate/Fe(II) molar ratio elevated •OH production. For pollutant degradation, 1 mg/L phenol was degraded by 53.6% within 40 min during oxygenation of Fe(II)-citrate system (1:1) at pH 7. Our results suggest that a moderate molar ratio of ligand/Fe(II) (0.5–1) may be optimal for Fe(II)-catalyzed O2 and H2O2 oxidation processes. Full article
(This article belongs to the Special Issue State-of-the-Art Research of Soil and Groundwater Remediation)
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11 pages, 3365 KiB  
Article
Innovative Cost-Effective Nano-NiCo2O4 Cathode Catalysts for Oxygen Reduction in Air–Cathode Microbial Electrochemical Systems
by Qixing Zhou, Ruixiang Li, Xiaolin Zhang and Tian Li
Int. J. Environ. Res. Public Health 2022, 19(18), 11609; https://doi.org/10.3390/ijerph191811609 - 15 Sep 2022
Cited by 3 | Viewed by 1421
Abstract
Microbial electrochemical systems (MESs) can harvest bioelectricity from varieties of organic matter in wastewater through electroactive microorganisms. Oxygen reduction reaction (ORR) in a cathode plays an important role in guaranteeing high power generation, which can be enhanced by cathode catalysts. Herein, the tiny [...] Read more.
Microbial electrochemical systems (MESs) can harvest bioelectricity from varieties of organic matter in wastewater through electroactive microorganisms. Oxygen reduction reaction (ORR) in a cathode plays an important role in guaranteeing high power generation, which can be enhanced by cathode catalysts. Herein, the tiny crystalline grain nanocrystal NiCo2O4 is prepared via the economic method and utilized as an effective catalyst in air–cathode MESs. The linear sweep voltammetry results indicate that the current density of 2% nano-NiCo2O4/AC cathode (5.05 A/m2) at 0 V increases by 20% compared to the control (4.21 A/m2). The cyclic voltammetries (CVs) and the electrochemical impedance spectroscopy (EIS) showed that the addition of nano-NiCo2O4 (2%) is efficient in boosting the redox activity. The polarization curves showed that the MESs with 2% nano-NiCo2O4/AC achieved the highest maximum power density (1661 ± 28 mW/m2), which was 1.11 and 1.22 times as much as that of AC and 5% nano-NiCo2O4. Moreover, the adulteration of nano-NiCo2O4 with a content of 2% can not only enable the electrical activity of the electrode to be more stable, but also reduce the cost for the same power generation in MESs. The synthetic nano-NiCo2O4 undoubtedly has great benefits for large-scale MESs in wastewater treatment. Full article
(This article belongs to the Special Issue State-of-the-Art Research of Soil and Groundwater Remediation)
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