Results 51 to 60 of about 471 (140)

Microbiome dynamics of a polychlorobiphenyl (PCB) historically contaminated marine sediment under conditions promoting reductive dechlorination

Frontiers in Microbiology, 2016
The toxicity of polychlorinated biphenyls (PCB) can be efficiently reduced in contaminated marine sediments through the reductive dechlorination process lead by anaerobic organohalide bacteria.
Bruna Matturro, Carla Ubaldi, Simona Rossetti   +2 more
doaj   +1 more source

Biogeochemical characterization of micritized carbonate grains in the shallow‐marine Al‐Kharrar Lagoon (Red Sea, Saudi Arabia)

Sedimentology, Volume 72, Issue 5, Page 1593-1619, August 2025.
ABSTRACT Micritization of marine carbonate grains is an early diagenetic process involving the alteration of the original carbonate fabric and the formation of cryptocrystalline textures through cycles of dissolution and reprecipitation. Microorganisms play a significant role in this process, actively contributing to the formation of constructive and ...
Camila Areias, Elisa Garuglieri, Thomas Teillet, Viswasanthi Chandra, Ramona Marasco, Volker Vahrenkamp, Daniele Daffonchio, John J. G. Reijmer, Mónica Sánchez‐Román   +8 more
wiley   +1 more source

Metagenomic- and Cultivation-Based Exploration of Anaerobic Chloroform Biotransformation in Hypersaline Sediments as Natural Source of Chloromethanes

Microorganisms, 2020
Chloroform (CF) is an environmental contaminant that can be naturally formed in various environments ranging from forest soils to salt lakes. Here we investigated CF removal potential in sediments obtained from hypersaline lakes in Western Australia ...
Peng Peng, Yue Lu, Tom N.P. Bosma, Ivonne Nijenhuis, Bart Nijsse, Sudarshan A. Shetty, Alexander Ruecker, Alexander Umanets, Javier Ramiro-Garcia, Andreas Kappler, Detmer Sipkema, Hauke Smidt, Siavash Atashgahi   +12 more
doaj   +1 more source

Heavy Metal Remediation: A Sustainable Approach

Applied and Environmental Soil Science, Volume 2025, Issue 1, 2025.
With an emphasis on bioremediation as a crucial approach to mitigate the detrimental effects of heavy metals (HMs), this study explores the causes of HM pollution, their impact on the environment and human health, and remediation techniques. In contrast to traditional physical and chemical methods, bioremediation offers a more economical, less toxic ...
Ujjal Dhakal, Manita Aryal, Muhammad Yousuf Jat Baloch, Purnima Baidya, Nidhi Chaudhary   +4 more
wiley   +1 more source

Vitamin B12 as a source of variability in isotope effects for chloroform biotransformation by Dehalobacter

MicrobiologyOpen, Volume 13, Issue 4, August 2024.
The presence of vitamin B12 has a significant effect on carbon isotope effects, consistent with an isotope masking effect. We interpret this in the context of predicted enzyme structures. Abstract Carbon and chlorine isotope effects for biotransformation of chloroform by different microbes show significant variability.
Elizabeth Phillips, Katherine Picott, Steffen Kümmel, Olivia Bulka, Elizabeth Edwards, Po‐Hsiang Wang, Matthias Gehre, Ivonne Nijenhuis, Barbara S. Lollar   +8 more
wiley   +1 more source

Enrichment and characterization of marine organohalide respiring bacteria and of their dehalogenating enzymes [PDF]

, 2019
Organohalide pollution of freshwater and marine sediments threatens human and environmental well-being. In freshwater and marine sediments a natural anaerobic microbiological process called reductive dehalogenation (RD) is carried out by organohalide respiring bacteria (OHRB) and reduces toxicity and improves biodegradability of organohalide pollutants.
openaire   +1 more source

Dechlorination and organohalide-respiring bacteria dynamics in sediment samples of the Yangtze Three Gorges Reservoir

Environmental Science and Pollution Research, 2013
Several groups of bacteria such as Dehalococcoides spp., Dehalobacter spp., Desulfomonile spp., Desulfuromonas spp., or Desulfitobacterium spp. are able to dehalogenate chlorinated pollutants such as chloroethenes, chlorobenzenes, or polychlorinated biphenyls under anaerobic conditions.
Kranzioch, I., Stoll, C., Holbach, A., Chen, H., Wang, L., Zheng, B., Norra, S., Bi, Y., Schramm, K.-W., Tiehm, A.   +9 more
openaire   +3 more sources

Functional Expression and Characterization of Tetrachloroethene Dehalogenase From Geobacter sp.

Frontiers in Microbiology, 2018
Reductive dehalogenase (RDase) consists of two parts, RdhA and RdhB. RdhA is the catalytic subunit, harboring a cobalamin cofactor and two Fe–S clusters. RdhA is anchored to the cytoplasmic membrane via the membrane anchoring subunit, RdhB.
Ryuki Nakamura, Tomohiro Obata, Ryota Nojima, Yohey Hashimoto, Keiichi Noguchi, Takahiro Ogawa, Masafumi Yohda, Masafumi Yohda   +7 more
doaj   +1 more source

Spatial and temporal dynamics of organohalide-respiring bacteria in a heterogeneous PCE–DNAPL source zone

Journal of Contaminant Hydrology, 2015
Effective treatment of sites contaminated with dense non-aqueous phase liquids (DNAPLs) requires detailed understanding of the microbial community responses to changes in source zone strength and architecture. Changes in the spatial and temporal distributions of the organohalide-respiring Dehalococcoides mccartyi (Dhc) strains and Geobacter lovleyi ...
Natalie L, Cápiro, Frank E, Löffler, Kurt D, Pennell   +2 more
openaire   +3 more sources

Ecology and biogeography of bacterial communities associated with chloroethene-contaminated aquifers

Frontiers in Microbiology, 2012
Massive usage, along with careless handling, storage, spills and leakages made chloroethenes (CEs) one of the most abundant classes of groundwater contaminants.
Pierre eRossi, Noam eShani, Florian eKohler, Gwenaël eImfeld, Christof eHolliger   +4 more
doaj   +1 more source