New insight into quinones triggered ferrate in-situ synthesized polynuclear Fe-hydroxyl complex for enhancing interfacial adsorption in highly efficient removal of natural organic matter

2021 ◽  
Vol 770 ◽  
pp. 144844
Author(s):  
Guang Yang ◽  
Jie Wang ◽  
Hongwei Zhang ◽  
Hui Jia ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Efficient Removal ◽  
Highly Efficient ◽  
Interfacial Adsorption ◽  
Insight Into

Integrated Molecular and Microscopic Scale Insight into Morphology and Ion Dynamics in Ca2+-Mediated Natural Organic Matter Floccs

2015 ◽  
Vol 119 (31) ◽  
pp. 17773-17783 ◽  
Author(s):  
Geoffrey M. Bowers ◽  
Haley E. Argersinger ◽  
U. Venkataswara Reddy ◽  
Timothy A. Johnson ◽  
Bruce Arey ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Ion Dynamics ◽  
Microscopic Scale ◽  
Insight Into

scholarly journals Discovery of functional gene markers of bacteria for monitoring hydrocarbon pollution in the marine environment - a metatranscriptomics approach

2019 ◽  
Author(s):  
Kamila Knapik ◽  
Andrea Bagi ◽  
Adriana Krolicka ◽  
Thierry Baussant
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Anthropogenic Pollution ◽  
Seasonal Effect ◽  
Marker Genes ◽  
Functional Markers ◽  
Gene Markers ◽  
Kegg Pathways ◽  
Oil Biodegradation

AbstractThe use of natural marine bacteria as “oil sensors” for the detection of pollution events can be suggested as a novel way of monitoring oil occurrence at sea. Nucleic acid-based devices generically called genosensors are emerging as potentially promising tools for in situ detection of specific microbial marker genes suited for that purpose. Functional marker genes are particularly interesting as targets for oil-related genosensing but their identification remains a challenge. Here, seawater samples, collected in tanks with oil addition mimicking a realistic oil spill scenario, were filtered and archived by the Environmental Sample Processor (ESP), a fully robotized genosensor, and the samples were then used for post-retrieval metatranscriptomic analysis. After extraction, RNA from ESP-archived samples at start, day 4 and day 7 of the experiment was used for sequencing. Metatranscriptomics revealed that several KEGG pathways were significantly enriched in samples exposed to oil. However, these pathways were highly expressed also in the non-oil-exposed water samples, most likely as a result of the release of natural organic matter from decaying phytoplankton. Temporary peaks of aliphatic alcohol and aldehyde dehydrogenases and monoaromatic ring-degrading enzymes (e.g. ben, box, and dmp clusters) were observed on day 4 in both control and oil tanks. Few alkane 1-monooxygenase genes were upregulated on oil, mostly transcribed by families Porticoccaceae and Rhodobacteraceae, together with aromatic ring-hydroxylating dioxygenases, mostly transcribed by Rhodobacteraceae. Few transcripts from obligate hydrocarbonoclastic genera of Alcanivorax, Oleispira and Cycloclasticus, were significantly enriched in the oil-treated tank in comparison to control, and these were mostly transporters and genes involved in nitrogen and phosphorous acquisition. This study highlights the importance of seasonality, i.e., phytoplankton occurrence and senescence leading to organic compound release which can be used preferentially by bacteria over oil compounds, delaying the latter process. As a result, such seasonal effect can reduce the sensitivity of genosensing tools employing bacterial functional genes to sense oil. A better understanding of the use of natural organic matter by bacteria involved in oil-biodegradation is needed to develop an array of functional markers enabling the rapid and specific in situ detection of anthropogenic pollution.

scholarly journals Metatranscriptomic Analysis of Oil-Exposed Seawater Bacterial Communities Archived by an Environmental Sample Processor (ESP)

2020 ◽  
Vol 8 (5) ◽  
pp. 744
Author(s):  
Kamila Knapik ◽  
Andrea Bagi ◽  
Adriana Krolicka ◽  
Thierry Baussant
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Environmental Sample ◽  
Anthropogenic Pollution ◽  
Seasonal Effect ◽  
Marker Genes ◽  
Functional Markers ◽  
Kegg Pathways ◽  
In Situ Detection

The use of natural marine bacteria as “oil sensors” for the detection of pollution events can be suggested as a novel way of monitoring oil occurrence at sea. Nucleic acid-based devices generically called genosensors are emerging as potentially promising tools for in situ detection of specific microbial marker genes suited for that purpose. Functional marker genes are particularly interesting as targets for oil-related genosensing but their identification remains a challenge. Here, seawater samples, collected in tanks with oil addition mimicking a realistic oil spill scenario, were filtered and archived by the Environmental Sample Processor (ESP), a fully robotized genosensor, and the samples were then used for post-retrieval metatranscriptomic analysis. After extraction, RNA from ESP-archived samples at start, Day 4 and Day 7 of the experiment was used for sequencing. Metatranscriptomics revealed that several KEGG pathways were significantly enriched in samples exposed to oil. However, these pathways were highly expressed also in the non-oil-exposed water samples, most likely as a result of the release of natural organic matter from decaying phytoplankton. Temporary peaks of aliphatic alcohol and aldehyde dehydrogenases and monoaromatic ring-degrading enzymes (e.g., ben, box, and dmp clusters) were observed on Day 4 in both control and oil-exposed and non-exposed tanks. Few alkane 1-monooxygenase genes were upregulated on oil, mostly transcribed by families Porticoccaceae and Rhodobacteraceae, together with aromatic ring-hydroxylating dioxygenases, mostly transcribed by Rhodobacteraceae. Few transcripts from obligate hydrocarbonoclastic genera of Alcanivorax, Oleispira and Cycloclasticus were significantly enriched in the oil-treated exposed tank in comparison to control the non-exposed tank, and these were mostly transporters and genes involved in nitrogen and phosphorous acquisition. This study highlights the importance of seasonality, i.e., phytoplankton occurrence and senescence leading to organic compound release which can be used preferentially by bacteria over oil compounds, delaying the latter process. As a result, such seasonal effect can reduce the sensitivity of genosensing tools employing bacterial functional genes to sense oil. A better understanding of the use of natural organic matter by bacteria involved in oil-biodegradation is needed to develop an array of functional markers enabling the rapid and specific in situ detection of anthropogenic pollution.

Molecular dynamics modeling of carbon dioxide, water and natural organic matter in Na-hectorite

2015 ◽  
Vol 17 (36) ◽  
pp. 23356-23367 ◽  
Author(s):  
A. Ozgur Yazaydin ◽  
Geoffrey M. Bowers ◽  
R. James Kirkpatrick
Keyword(s):  
Carbon Dioxide ◽  
Molecular Dynamics ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Organic Molecules ◽  
Dynamics Modeling ◽  
Scale Interactions ◽  
Molecular Dynamics Modeling ◽  
Molecular Scale ◽  
Insight Into

Molecular dynamics modeling of systems containing a Na-exchanged hectorite and model natural organic matter molecules along with pure H2O, pure CO2, or a mixture of H2O and CO2 provides significant new insight into the molecular scale interactions among silicate surfaces, dissolved cations and organic molecules, H2O and CO2.

scholarly journals Correction to Role of in Situ Natural Organic Matter in Mobilizing As during Microbial Reduction of FeIII-Mineral-Bearing Aquifer Sediments from Hanoi (Vietnam)

2020 ◽  
Vol 54 (16) ◽  
pp. 10380-10380
Author(s):  
M. Glodowska ◽  
E. Stopelli ◽  
M. Schneider ◽  
A. Lightfoot ◽  
B. Rathi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Microbial Reduction ◽  
Aquifer Sediments

scholarly journals Arsen in Grundwasser und Reis — Ursachen und Konsequenzen

BIOspektrum ◽  
2020 ◽  
Vol 26 (6) ◽  
pp. 676-678
Author(s):  
Hanna Joss ◽  
E. Marie Muehe ◽  
Andreas Kappler
Keyword(s):  
Climate Change ◽  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Electron Donors ◽  
Redox Processes ◽  
Rice Rhizosphere ◽  
Toxic Metalloid ◽  
Water Filters

Abstract The toxic metalloid arsenic (As) is present in the environment often associated with iron(III) oxide minerals. Arsenic can be mobilized into groundwater by iron(III)-reducing, and thus, mineral-dissolving bacteria. We investigate in situ natural organic matter and methane as electron donors fueling microbial iron(III) reduction, the removal of As by iron oxides in drinking water filters, and the effect of climate change on redox processes in the rice rhizosphere and on uptake of As into rice.

scholarly journals Fractal aggregation and disaggregation of newly formed iron(iii) (hydr)oxide nanoparticles in the presence of natural organic matter and arsenic

2016 ◽  
Vol 3 (3) ◽  
pp. 647-656 ◽  
Author(s):  
Chelsea W. Neil ◽  
Jessica R. Ray ◽  
Byeongdu Lee ◽  
Young-Shin Jun
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Oxide Nanoparticles ◽  
Aggregation And Disaggregation ◽  
First Time

This study provides for the first timein situobservations of organic matter and arsenic effects on iron(iii) (hydr)oxide precipitation.

Fabrication of the Al2O3 aerogels by in situ water formation method for the highly efficient removal of uranium(VI)

2021 ◽  
Vol 316 ◽  
pp. 110952
Author(s):  
Zhenhua Dang ◽  
Mingming Jia ◽  
Jun Liao ◽  
Yong Zhang ◽  
Wenkun Zhu
Keyword(s):  
Efficient Removal ◽  
Highly Efficient ◽  
Water Formation ◽  
Formation Method
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