Arsenic in seaweed—Forms, concentration and dietary exposure

Rose, Martin; Lewis, John; Langford, Nicola; Baxter, Malcolm; Origgi, Simona; Barber, Matthew; MacBain, Helen; Thomas, Kara

doi:10.1016/j.fct.2007.01.007

Cited by 173 publications

(131 citation statements)

References 7 publications

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“…In contrast to the many features of seaweeds beneficial for human health and nutrition, seaweeds may also accumulate undesired compounds such as heavy metals (lead, mercury, cadmium, arsenic) as well as minerals and trace elements which may be toxic above a certain limit (iodine, manganese, zinc) (Almela et al 2006;Rose et al 2007;Besada et al 2009). …”

Section: Risk Assessment 2-product Relatedmentioning

confidence: 99%

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

2017

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The use of cultivated seaweeds as a feedstock for multiple industrial applications has gained increasing interest in the Western World over the past decades. Norway has an extensive coastline and a well-established aquaculture sector offering suitable preconditions for developing large-scale cultivation of seaweed biomass both in monoculture and in Integrated Multi-Trophic Aquaculture (IMTA) systems. Recent efforts from research, industry and public authorities have been committed to develop a Norwegian bio-economy based on cultivated seaweed, focusing on cultivation and processing of the biomass. This review reports on the status of seaweed aquaculture in Norway, supported by production data collected since the delivery of the first commercial cultivation permits at sea in 2014. Although novel product developments are currently limited, future industrial perspectives based on cultivated biomass are being discussed. Upscaling from experimental cultivation schemes to commercial production requires a thorough assessment of the risks and benefits associated with seaweed aquaculture, as well as the development of a regulative framework adapted to this industry. Issues associated with upscaling the macroalgal production that needs to be addressed includes (i) genetic interactions between cultivated and wild crops, (ii) impacts of seaweed cultivation on surrounding ecosystems, (iii) epiphytes and diseases, (iv) area utilization and (v) threats from climate change. Addressing these issues and adapting production practices will ensure the environmental and economic sustainability of an emerging industry based on cultivated seaweed biomass in Norway.

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Section: Risk Assessment 2-product Relatedmentioning

confidence: 99%

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

2017

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“…Most of the iAs is naturally found from rock and sedimentation process and also from anthropogenic activities such as mining, smelting and the processing of mineral ores. However, levels of As are higher in aquatic ecosystem than in most terrestrial area as it is relatively water-soluble (Rose, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…It is relatively lower than iAs content on some edible seaweed. Massive amount of iAs had been reports on edible seaweed including 71% in hijiki (Phaeophyceae) (Rose, 2007), 49% in Cystoseira barbata (Phaeophyceae) (Duncan et al, 2013) and 23% in Codium vermilara (Bryopsidophyceae) (Llorente-Mirandes et al, 2010). These contrasting differences on iAs content because fish could methylate iAs to be organic form like arsenobethaine or arsenosugars in short time, but seaweed may needs more longer time.…”

Section: Introductionmentioning

confidence: 99%

Accumulation Time and Antioxidant Responses of Inorganic Arsenic on Brown Seaweed Padina minor

Violando

Andayani

Wong

et al. 2017

RJLS

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Padina minor had a good ability to bind and accumulate arsenic (As). This research aimed to observe the As accumulation and detoxification time, also the antioxidant defense activities. Each gram of P. minor was culture in various As contaminate media for 7 days, then reculture in As-free media for 14 days. There was an acute effect on thali by decreasing its growth slowly till final day with small amount accumulation at concentration 25 µg iAs g -1 . Meanwhile, direct attenuation impact was due at 50 and 100 µg iAs g -1 with massive accumulation. The thali starts to recover after reculture in health environment for 14 days. Only As 5+ was detected on the thali at day 7 and 21 were indicates internal oxidation of As 3+ was done before 7 days. Various antioxidant activities such as decreasing polysaccharide and increasing activities of DPPH and flavonoid at high level were observed. Those indicated that 50 µg iAs g -1 was optimum iAs level on P. minor. The results indicate that P. minor has ability to oxidase and methylate with antioxidant role as defensive activities against iAs, but it also needs more than 14 days to recover in high level contamination.

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“…11,12 A lot of studies on As species in marine algae concerned with environmental monitoring and food safety have been published. [13][14][15][16][17][18][19] In addition, many techniques for As speciation in seafood were reported. [20][21][22][23][24][25] Nowadays, we must develop a simple monitoring technique to determine inorganic As in algae, since a large amount of samples should be treated at one time to estimate various risks posed by ingestion inorganic As (i-As: As(III) and As(V)).…”

Section: Introductionmentioning

confidence: 99%

Aqueous Extraction of Water-soluble Inorganic Arsenic in Marine Algae for Speciation Analysis

2012

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35Cl + , which interferes with 75 As. The ion count was monitored at m/z = 75. Arsenic species were separated by HPLC (L-6000 pump, Hitachi High Technologies Co. Ltd., 2012 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. An aqueous extraction of inorganic As species, such as arsenite (As(III)) and arsenate (As(V)), was developed for monitoring inorganic As in the edible brown alga Hizikia fusiforme (hijiki). The ultrasonic extraction with water, even without heating, was found to be an acceptable monitoring method for an evaluation of water-soluble inorganic As, since it could extract about 80% of total As. Such an extraction efficiency was almost the same as those of enzyme assisted extraction methods. The developed extraction procedure was applied to 15 hijiki samples that had been collected at different coasts in Japan. All samples contained a substantial proportion of As as arsenosugars; the relative amounts of the different As species extracted were dependent on the sample. The percentages of extractable As species in the hijiki samples were in the range from 70 to 90%, and the sums of the concentrations of As(III) and As(V), which was defined as i-As, were in the range from 36 to 79% of the total As concentration in each sample. The proposed method is appropriate for environmental monitoring for inorganic As speciation in algae.

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Arsenic in seaweed—Forms, concentration and dietary exposure

Cited by 173 publications

References 7 publications

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

Accumulation Time and Antioxidant Responses of Inorganic Arsenic on Brown Seaweed Padina minor

Aqueous Extraction of Water-soluble Inorganic Arsenic in Marine Algae for Speciation Analysis

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