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Sustainability
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Sustainable Microbial Remediation of Oil-Contaminated Soils and Reclamation of Wastes
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Sustainable Microbial Remediation of Oil-Contaminated Soils and Reclamation of Wastes

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Environmental Sustainability and Applications".

Deadline for manuscript submissions: closed (10 November 2023) | Viewed by 2674

Special Issue Editor

Dr. Qigui Niu

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
Interests: microbial remediation of oil-contaminated soils

Special Issue Information

Dear Colleagues,

I am pleased to announce the launch of a new Special Issue focused on “Sustainable Microbial Remediation of Oil-Contaminated Soils and Reclamation of Wastes”. This Special Issue includes microbial remediation, biostimulants, microbial metabolic functional genes, and environment-friendly microbial treatment practices. Oil-contaminated soils (OCS) generated from oil exploitation, oil transportation, petroleum refining, and wastewater treatment of refineries are a serious environmental problem all over the world. OCS typically consist of oil, water, solid particles, and a series of recalcitrant compounds such as long-chain alkanes, polycyclic aromatic hydrocarbons (PAHs), and phenols, which have a strong biotoxic and usually harmful influence on organisms. Waste reclamation and microbial remediation are considered the appropriate treatment way. Microbial remediation as an effective method has been applied to degrade OCS due to its low cost and environmental friendliness. This method mainly depends on the unique capabilities of microbes to interact physically and chemically with a number of compounds in the ecoenvironment. Therefore, the microbial remediation of OCS, especially in saline environments, has become an ecoenvironmental issue, which has attracted wide attention from researchers. However, in the microbial remediation process, biotoxicity suppression has become a common barrier to biotreatment.

Therefore, this Special Issue invites papers from researchers and academics engaged in microbial treatment focusing on biodegradation and waste reclamation from OCS for sustainable microbial remediation. This Special Issue will publish papers highlighting the significance of biostimulants, bioaugmentation, and mutual co-metabolism.

Topics of interest include but are not limited to the following:

  • Exemplary practices in OCS toxicological studies;
  • The specific functional genes of sustainable microbial remediation of oil-contaminated soils;
  • the co-effects of salinity and oil-contaminated soil on microbial community succession;
  • Bioaugmentation mechanism of treatment processes;
  • The response mechanism of microorganisms to salinity oil-contaminated Soils;
  • The addition of porous, carbon-based conductive materials, and other micro mediated materials (biochar, ZVI,);
  • Challenges and updates in microbial remediation;
  • Wastes reclamation from oil-contaminated soils;
  • Risk management strategies of oil-contaminated soils;
  • Perspective and development of theory for microbial remediation,

Prof. Dr. Qigui Niu
Guest Editor

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. Sustainability 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 2400 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

  • oil-contaminated soils
  • microbial remediation
  • biostimulants
  • functional gene
  • waste reclamation
  • conductive materials
  • bio-augmentation

Published Papers (2 papers)

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Research

16 pages, 1927 KiB  
Article
Enhancing Anaerobic Biodegradation of Phenanthrene in Polluted Soil by Bioaugmentation and Biostimulation: Focus on the Distribution of Phenanthrene and Microbial Community Analysis
by Hanhan Xue, Yongsen Shi, Junpeng Qiao, Xiaoqian Li and Rutao Liu
Sustainability 2024, 16(1), 366; https://doi.org/10.3390/su16010366 - 30 Dec 2023
Viewed by 882
Abstract
The remediation of polycyclic aromatic hydrocarbon (PAH)-contaminated soils has received much attention in recent years, and most of the contaminated sites are in anaerobic environments, such as deep soils and flooded soils. We simulated the natural flooded soil environment, selected phenanthrene (PHE) as [...] Read more.
The remediation of polycyclic aromatic hydrocarbon (PAH)-contaminated soils has received much attention in recent years, and most of the contaminated sites are in anaerobic environments, such as deep soils and flooded soils. We simulated the natural flooded soil environment, selected phenanthrene (PHE) as a model PAH contaminant, and designed batch experiments run for 63 days to comprehensively investigate the effects of the combined addition of anaerobic sludge and granular biochar on microbial community and function and the anaerobic biodegradation of PHE. Firstly, the residue, distribution, and removal of PHE in the flooded soil environment were quantified for each group. Secondly, the effects of bioaugmentation of soil indigenous microorganisms by the addition of anaerobic activated sludge and biostimulation of biochar on the removal of PHE from the soil were analyzed against each other. Lastly, the changes in the structure of the microbial community under the effect of bioaugmentation and biostimulation were illustrated by sequencing analyses. The results of this study showed that the removal efficiency of PHE reached 72.0% after the addition of anaerobic activated sludge. The incorporation of anaerobic activated sludge and biochar resulted in a 25.3% increase in PHE removal compared to a single soil, suggesting that the combination of bioaugmentation and biostimulation can have a synergistic effect on the anaerobic biodegradation of PHE in contaminated soils. The results of sequencing analysis further indicated that the introduction of an exogenous microbial community changed the dominant genera associated with PHE degradation and introduced methanogenic archaea, which enriched the metabolic pathways of the carbon cycle in the system. On this basis, the addition of biochar resulted in higher anaerobic microbial community diversity, functional dominant species were enriched, and the direct interspecies electron transfer (DIET) process between electroactive bacteria (Bacteroides, f_Geobacteraceae) and Methanosaeta was facilitated, which accelerated the degradation of PHE by anaerobic microbial communities. The results of this study provide regulatory tools and basic data support for enhanced bioremediation of PAHs in flooded soils. Full article
(This article belongs to the Special Issue Sustainable Microbial Remediation of Oil-Contaminated Soils and Reclamation of Wastes)
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15 pages, 3554 KiB  
Article
Influences of Naphthalene Concentration on Starch Anaerobic Digestion: Focusing on Digestion Performance, Extracellular Polymeric Substances and Function Microbial Community
by Yilin Yao, Jingyi Li, Hanhan Xue, Yutong Liu, Junpeng Qiao, Jingchun Tang, Rutao Liu and Qigui Niu
Sustainability 2022, 14(24), 16377; https://doi.org/10.3390/su142416377 - 07 Dec 2022
Viewed by 1189
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are widely distributed in the sludge environment due to activities such as oil extraction and pose a serious threat to deep-seated anaerobic microorganisms. Thus, in this study, we discussed the dose–response efficiency of naphthalene (Nap, a typical PAH) on [...] Read more.
Polycyclic aromatic hydrocarbons (PAHs) are widely distributed in the sludge environment due to activities such as oil extraction and pose a serious threat to deep-seated anaerobic microorganisms. Thus, in this study, we discussed the dose–response efficiency of naphthalene (Nap, a typical PAH) on anaerobic digestion (AD) through co-metabolic degradation via batch experiments. The batch results showed that 30 mg/L Nap promoted the AD with the accumulation of CH4 18.54% higher than the control (without Nap) by increasing the efficiency of hydrolysis and acetogenesis 99.49% and 61.95%, respectively. However, adverse effects were observed with an excessive dosage of Nap (higher than 100 mg/L) with a decrease of methane production (37.16) with 2000 mg/L Nap. Interestingly, the concentrations of the polysaccharide and protein reached the highest at 138.76 mg/L and 400.41 mg/L, respectively, in 1000 mg/L Nap. Furthermore, the high activities of hydrolase and transmembrane ATPase were acquired in 30 mg/L Nap. In addition, Nap significantly affected the methanogenic microbial abundance and diversity, especially diminishing Methanolinea and Syntrophobacter. Furthermore, the enrichment of Bacteroides in 30 mg/L Nap showed moderate Nap could facilitate hydrolysis. The genes relevant to cellular processes were activated by Nap. This research provided a reliable basis for the anaerobic microbial response under Nap stress. Full article
(This article belongs to the Special Issue Sustainable Microbial Remediation of Oil-Contaminated Soils and Reclamation of Wastes)
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