Autotrophic denitrification and its effect on metal speciation during marine sediment remediation

Shao, Mingfei; Zhang, Tong; Fang, Hhp

doi:10.1016/j.watres.2009.04.016

Cited by 56 publications

(18 citation statements)

References 33 publications

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“…Sewage and industrial effluent had been discharged there for decades until the installation of a new sewage collection system in the late 1990s. The long lasting sulfate-reducing conditions resulted in a high sulfide concentration in the sediment, where an AVS (Acid-Volatile Sulfide) of 198 μmol g -1 had been measured [8]. The pore water after centrifugation at 4,000 rpm for 15 min had a pH of 7.89 and a salinity of 2.9%.…”

Section: Classification and Featuresmentioning

confidence: 99%

“…The most widely shared feature of Sulfurimonas members is chemolithoautotrophy; strains can grow by oxidizing hydrogen gas, elemental sulfur, hydrogen sulfide, or thiosulfate [1-7]. In our previous studies, anoxic sulfur-oxidizing bacteria were demonstrated to dominate the nitrate induced marine sediment remediation process [8-10]. Phylogenetic analysis based on 16S rRNA genes showed that Epsilonproteobacteria closely related to S.…”

Section: Introductionmentioning

confidence: 99%

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Non-contiguous finished genome sequence and description of Sulfurimonas hongkongensis sp. nov., a strictly anaerobic denitrifying, hydrogen- and sulfur-oxidizing chemolithoautotroph isolated from marine sediment

Lin

Shao²,

Zhang

2014

Stand. Genomic Sci.

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Here, we report a type strain AST-10 representing a novel species Sulfurimonas hongkongensis within Epsilonproteobacteria, which is involved in marine sedimentary sulfur oxidation and denitrification. Strain AST-10T (= DSM 22096T = JCM 18418T) was isolated from the coastal sediment at the Kai Tak Approach Channel connected to Victoria Harbour in Hong Kong. It grew chemolithoautotrophically using thiosulfate, sulfide or hydrogen as the sole electron donor and nitrate as the electron acceptor under anoxic conditions. It was rod-shaped and grew at 15-35°C (optimum at 30°C), pH 6.5-8.5 (optimum at 7.0-7.5), and 10-60 g L-1 NaCl (optimum at 30 g L-1). Genome sequencing and annotation of strain AST-10T showed a 2,302,023 bp genome size, with 34.9% GC content, 2,290 protein-coding genes, and 42 RNA genes, including 3 rRNA genes.

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Section: Classification and Featuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-contiguous finished genome sequence and description of Sulfurimonas hongkongensis sp. nov., a strictly anaerobic denitrifying, hydrogen- and sulfur-oxidizing chemolithoautotroph isolated from marine sediment

Lin

Shao²,

Zhang

2014

Stand. Genomic Sci.

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“…However, even in this sediment, DEN activity dominated dissimilatory nitrate reduction. Possibly, heterotrophic denitrifiers were out competed by autotrophic denitrifiers who can oxidize sulfide to sulfate in the presence of NO − 3 and therefore exist even in sediments high in sulfide (Brinkhoff et al, 1998;Shao et al, 2009). The role of sulfide in stimulating DNRA can be further questioned based on the results of the slurry incubations.…”

Section: Sulfidementioning

confidence: 99%

Vertical activity distribution of dissimilatory nitrate reduction in coastal marine sediments

2013

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Abstract. The relative importance of two dissimilatory nitrate reduction pathways, denitrification (DEN) and dissimilatory nitrate reduction to ammonium (DNRA), was investigated in intact sediment cores from five different coastal marine field sites (Dorum, Aarhus Bight, Mississippi Delta, Limfjord and Janssand). The vertical distribution of DEN activity was examined using the acetylene inhibition technique combined with N 2 O microsensor measurements, whereas NH + 4 production via DNRA was measured with a recently developed gel probe-stable isotope technique. At all field sites, dissimilatory nitrate reduction was clearly dominated by DEN (59-131 % of the total NO − 3 reduced) rather than by DNRA, irrespective of the sedimentary inventories of electron donors such as organic carbon, sulfide, and iron. Highest ammonium production via DNRA, accounting for up to 8.9 % of the total NO − 3 reduced, was found at a site with very high concentrations of total sulfide and NH + 4 within and below the layer in which NO − 3 reduction occurred. Sediment from two field sites, one with low and one with high DNRA activity in the core incubations, was also used for slurry incubations. Now, in both sediments high DNRA activity was detected accounting for 37-77 % of the total NO − 3 reduced. These contradictory results might be explained by enhanced NO − 3 availability for DNRA bacteria in the sediment slurries compared to the core-incubated sediments in which diffusion of NO − 3 from the water column may only reach DEN bacteria, but not DNRA bacteria. The true partitioning of dissimilatory nitrate reduction between DNRA and DEN may thus lie in between the values found in whole core (underestimation of DNRA) and slurry incubations (overestimation of DNRA).

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“…6b). This trend is a result of the oxidation of metal sulfide (MeS) (Shao et al, 2009) and can be represented as follows (Cardoso et al, 2006):…”

Section: Geochemical Alterationsmentioning

confidence: 99%

“…Some authors have suggested that nitrate application increases the concentration of hazardous substances that can cause toxicity for organisms. According to Shao et al (2009), an incremental increase in autotrophic denitrification can lead to an increase in heavy metal mobility. Foy (1986) demonstrated that nitrate addition can also increase ammonium concentration.…”

Section: Introductionmentioning

confidence: 99%

Calcium nitrate addition to control the internal load of phosphorus from sediments of a tropical eutrophic reservoir: Microcosm experiments

et al. 2012

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Autotrophic denitrification and its effect on metal speciation during marine sediment remediation

Cited by 56 publications

References 33 publications

Non-contiguous finished genome sequence and description of Sulfurimonas hongkongensis sp. nov., a strictly anaerobic denitrifying, hydrogen- and sulfur-oxidizing chemolithoautotroph isolated from marine sediment

Non-contiguous finished genome sequence and description of Sulfurimonas hongkongensis sp. nov., a strictly anaerobic denitrifying, hydrogen- and sulfur-oxidizing chemolithoautotroph isolated from marine sediment

Vertical activity distribution of dissimilatory nitrate reduction in coastal marine sediments

Calcium nitrate addition to control the internal load of phosphorus from sediments of a tropical eutrophic reservoir: Microcosm experiments

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