Special Issue "Biotechnologies for the Environment: Strategies for Containment and Depletion of Pollution in Wastewaters, Air, Soils and Sediments"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Aquatic Systems—Quality and Contamination".

Deadline for manuscript submissions: 30 September 2021.

Special Issue Editor

Dr. Simona Di Gregorio
E-Mail Website
Guest Editor
Biology Department, University of Pisa, Via Luca Ghini 13, Pisa, Italy
Interests: environmental microbiology; microbial molecular ecology; isolation and characterization of new microbial strains

Special Issue Information

Dear Colleagues,

With an increasing awareness of the hostile effects of pollutants on the biosphere, reclamation or remediation of different environmental compartments contaminated by persisting and emerging pollutants is nowadays of global concern. Environmental biotechnologies have emerged as sustainable approaches to contain and eventually solve the problem worldwide. Environmental biotechnologies are based on the exploitation of microbial activities as catalysts of reactions for environment decontamination. The knowledge of microbial activity can be exploited for wastewater treatment, for gaseous emission removal, and for biodegradation of environmental organic pollutants and is crucial for the control of environmental pollution. The implementation of aerobic as well as anaerobic microbial activities exploited for their catabolic ability to treat biodegradable waste or pollutants has become an efficient, economical, and environmentally friendly technique that calls for a continuous multidisciplinary discussion between specialists in the environmental sector. This Special Issue aims to be a tool of comparison by addressing aspects such as mitigation and remediation of persistent, emerging, and other contaminants; sources, transport, and fate of persistent and emerging contaminants; toxicology and eco-toxicology of persistent contaminants; and molecular approaches dedicated to the study of the microbial ecology of contaminated matrices and to the restoration of biodiversity and resilience.

Dr. Simona Di Gregorio
Guest Editor

Manuscript Submission Information

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Keywords

  • dynamics and diversity of microbial populations
  • ecotoxicity of polluted environmental matrices
  • degradation/transformation of persistent contaminants
  • degradation/transformation of emerging contaminants
  • isolation and characterization of new microbial strains for pollution depletion
  • bioremediation
  • bioaugmentation
  • in situ and ex situ treatment
  • myco-remediation
  • micro and nanoplastics in the environment

Published Papers (2 papers)

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Research

Article
Optimization of an Autochthonous Bacterial Consortium Obtained from Beach Sediments for Bioremediation of Petroleum Hydrocarbons
Water 2021, 13(1), 66; https://doi.org/10.3390/w13010066 - 31 Dec 2020
Cited by 3 | Viewed by 675
Abstract
Oil spill pollution remains a serious concern in marine environments and the development of effective oil bioremediation techniques are vital. This work is aimed at developing an autochthonous hydrocarbon-degrading consortium with bacterial strains with high potential for hydrocarbons degradation, optimizing first the growth [...] Read more.
Oil spill pollution remains a serious concern in marine environments and the development of effective oil bioremediation techniques are vital. This work is aimed at developing an autochthonous hydrocarbon-degrading consortium with bacterial strains with high potential for hydrocarbons degradation, optimizing first the growth conditions for the consortium, and then testing its hydrocarbon-degrading performance in microcosm bioremediation experiments. Bacterial strains, previously isolated from a sediment and cryopreserved in a georeferenced microbial bank, belonged to the genera Pseudomonas, Rhodococcus and Acinetobacter. Microcosms were assembled with natural seawater and petroleum, for testing: natural attenuation (NA); biostimulation (BS) (nutrients addition); bioaugmentation with inoculum pre-grown in petroleum (BA/P) and bioaugmentation with inoculum pre-grown in acetate (BA/A). After 15 days, a clear blending of petroleum with seawater was observed in BS, BA/P and BA/A but not in NA. Acetate was the best substrate for consortium growth. BA/A showed the highest hydrocarbons degradation (66%). All bacterial strains added as inoculum were recovered at the end of the experiment. This study provides an insight into the capacity of autochthonous communities to degrade hydrocarbons and on the use of alternative carbon sources for bacterial biomass growth for the development of bioremediation products to respond to oil spills. Full article
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Article
A New Thioalkalivibrio sp. Strain Isolated from Petroleum-Contaminated Brackish Estuary Sediments: A New Candidate for Bio-Based Application for Sulfide Oxidation in Halo-Alkaline Conditions
Water 2020, 12(5), 1385; https://doi.org/10.3390/w12051385 - 13 May 2020
Viewed by 757
Abstract
A new halo-alkaline sulfur-oxidising bacterial strain was isolated from brackish estuary sediments contaminated by total petroleum hydrocarbon. The isolate was classified as a new strain of Thioalkalivibrio sulfidiphilus sp., showing a higher capability of adaptation to pH and a higher optimal sodium concentration [...] Read more.
A new halo-alkaline sulfur-oxidising bacterial strain was isolated from brackish estuary sediments contaminated by total petroleum hydrocarbon. The isolate was classified as a new strain of Thioalkalivibrio sulfidiphilus sp., showing a higher capability of adaptation to pH and a higher optimal sodium concentration for growth, when compared to Thioalkalivibrio sulfidiphilus sp. HL-EbGr7, type strain of the species. The strain was capable to grow in saline concentrations up to 1.5 M Na+ and pH up to 10. The genome of the new isolate was sequenced and annotated. The comparison with the genome of Thioalkalivibrio sulfidiphilus sp. HL-EbGr7 showed a duplication of an operon encoding for a putative primary sodium extruding pump and the presence of a sodium/proton antiporter with optimal efficiency at halo-alkaline conditions. The new strain was able to oxidize sulfide at halo-alkaline conditions at the rate of 1 mmol/mg-N/h, suitable for industrial applications dedicated to the recovery of alkaline scrubber for H2S emission absorption and abatement. Full article
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