Biodegradation of arsenosugars in marine sediment

P. Pengprecha, Mhairi Nicole Wilson, Andrea Raab, Jorg Feldmann

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In the marine environment, arsenic accumulates in seaweed and occurs mostly in the form of arsenoribofuranosides (often called arsenosugars). This study investigated the degradation pathways of arsenosugars from decaying seaweed in a mesocosm experiment. Brown seaweed (Laminaria digitata) was placed on top of a marine sediment soaked with seawater. Seawater and porewater samples from different depths were collected and analysed for arsenic species in order to identify the degradation products using high-performance liquid chomatography-inductively coupled plasma mass spectrometry. During the first 10 days most of the arsenic found in the seawater and the shallow sediment is in the form of the arsenosugars released from the seaweed. Dimethylarsenoylethanol (DMAE), dimethylarsinic acid (DMA(V)) and, later, monomethylarsonic acid (MMA(V)) and arsenite and arsenate were also formed. In the deeper anaerobic sediment, the arsenosugars disappear more quickly and DMAE is the main metabolite with 60-80% of the total arsenic for the first 60 days besides a constant DMAM contribution of 10-20% of total soluble arsenic. With the degradation of the soluble DMAE the solubility of arsenic decreases in the sediment. The final soluble degradation products (after 106 days) were arsenite, arsenate, MMA(V) and DMA(V). No arsenobetaine or arsenocholine were identified in the porewater. Copyright (c) 2005 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)819-826
Number of pages7
JournalApplied Organometallic Chemistry
Volume19
DOIs
Publication statusPublished - 2005

Keywords

  • seaweed
  • Laminaria digitata
  • anaerobic degradation
  • biotransformation
  • arsenosugars
  • arsenoribofuranosides
  • mesocosm
  • arsenic speciation
  • KELP ECKLONIA-RADIATA
  • ANAEROBIC DECOMPOSITION
  • SARGASSUM-LACERIFOLIUM
  • ARSENIC SPECIATION
  • ICP-MS
  • BIOTRANSFORMATION
  • CHROMATOGRAPHY
  • ARSENOBETAINE
  • SEAWEED
  • SAMPLE

Cite this

Biodegradation of arsenosugars in marine sediment. / Pengprecha, P.; Wilson, Mhairi Nicole; Raab, Andrea; Feldmann, Jorg.

In: Applied Organometallic Chemistry, Vol. 19, 2005, p. 819-826.

Research output: Contribution to journalArticle

Pengprecha, P. ; Wilson, Mhairi Nicole ; Raab, Andrea ; Feldmann, Jorg. / Biodegradation of arsenosugars in marine sediment. In: Applied Organometallic Chemistry. 2005 ; Vol. 19. pp. 819-826.
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T1 - Biodegradation of arsenosugars in marine sediment

AU - Pengprecha, P.

AU - Wilson, Mhairi Nicole

AU - Raab, Andrea

AU - Feldmann, Jorg

PY - 2005

Y1 - 2005

N2 - In the marine environment, arsenic accumulates in seaweed and occurs mostly in the form of arsenoribofuranosides (often called arsenosugars). This study investigated the degradation pathways of arsenosugars from decaying seaweed in a mesocosm experiment. Brown seaweed (Laminaria digitata) was placed on top of a marine sediment soaked with seawater. Seawater and porewater samples from different depths were collected and analysed for arsenic species in order to identify the degradation products using high-performance liquid chomatography-inductively coupled plasma mass spectrometry. During the first 10 days most of the arsenic found in the seawater and the shallow sediment is in the form of the arsenosugars released from the seaweed. Dimethylarsenoylethanol (DMAE), dimethylarsinic acid (DMA(V)) and, later, monomethylarsonic acid (MMA(V)) and arsenite and arsenate were also formed. In the deeper anaerobic sediment, the arsenosugars disappear more quickly and DMAE is the main metabolite with 60-80% of the total arsenic for the first 60 days besides a constant DMAM contribution of 10-20% of total soluble arsenic. With the degradation of the soluble DMAE the solubility of arsenic decreases in the sediment. The final soluble degradation products (after 106 days) were arsenite, arsenate, MMA(V) and DMA(V). No arsenobetaine or arsenocholine were identified in the porewater. Copyright (c) 2005 John Wiley & Sons, Ltd.

AB - In the marine environment, arsenic accumulates in seaweed and occurs mostly in the form of arsenoribofuranosides (often called arsenosugars). This study investigated the degradation pathways of arsenosugars from decaying seaweed in a mesocosm experiment. Brown seaweed (Laminaria digitata) was placed on top of a marine sediment soaked with seawater. Seawater and porewater samples from different depths were collected and analysed for arsenic species in order to identify the degradation products using high-performance liquid chomatography-inductively coupled plasma mass spectrometry. During the first 10 days most of the arsenic found in the seawater and the shallow sediment is in the form of the arsenosugars released from the seaweed. Dimethylarsenoylethanol (DMAE), dimethylarsinic acid (DMA(V)) and, later, monomethylarsonic acid (MMA(V)) and arsenite and arsenate were also formed. In the deeper anaerobic sediment, the arsenosugars disappear more quickly and DMAE is the main metabolite with 60-80% of the total arsenic for the first 60 days besides a constant DMAM contribution of 10-20% of total soluble arsenic. With the degradation of the soluble DMAE the solubility of arsenic decreases in the sediment. The final soluble degradation products (after 106 days) were arsenite, arsenate, MMA(V) and DMA(V). No arsenobetaine or arsenocholine were identified in the porewater. Copyright (c) 2005 John Wiley & Sons, Ltd.

KW - seaweed

KW - Laminaria digitata

KW - anaerobic degradation

KW - biotransformation

KW - arsenosugars

KW - arsenoribofuranosides

KW - mesocosm

KW - arsenic speciation

KW - KELP ECKLONIA-RADIATA

KW - ANAEROBIC DECOMPOSITION

KW - SARGASSUM-LACERIFOLIUM

KW - ARSENIC SPECIATION

KW - ICP-MS

KW - BIOTRANSFORMATION

KW - CHROMATOGRAPHY

KW - ARSENOBETAINE

KW - SEAWEED

KW - SAMPLE

U2 - 10.1002/aoc.579

DO - 10.1002/aoc.579

M3 - Article

VL - 19

SP - 819

EP - 826

JO - Applied Organometallic Chemistry

JF - Applied Organometallic Chemistry

SN - 0268-2605

ER -