Total arsenic, inorganic arsenic, lead and cadmium contents in edible seaweed sold in Spain

Almela, Concepción; Clemente, María Jesús; Vélez, Dinoraz; Montoro, R.

doi:10.1016/j.fct.2006.06.011

Cited by 172 publications

(156 citation statements)

References 24 publications

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“…(32 mg kg À1 ) and Pylaiella littoralis (20 mg kg À1 ) had higher arsenic concentrations, and closer to previously reported total arsenic concentrations in brown algae, which commonly range between 20 and 100 mg kg À1 . [31][32][33] The sum of the fractions is in good agreement with the total arsenic in the algae (Fig. 2).…”

Section: Total Arsenic In the Ectocarpales And Culturessupporting

confidence: 65%

Environmental effects on arsenosugars and arsenolipids in Ectocarpus (Phaeophyta)

et al. 2016

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Environmental context. Arsenolipids, which are present in seaweed, can show high toxicity, emphasising the need for more information on these compounds. We investigated the effects of different stress factors on the arsenic compounds formed by cultures of brown algae, and compared the results with those from field-collected samples. We show that the arsenolipid and arsenosugar profiles differ depending on the experimental conditions, and that a deficiency in phosphate has a direct positive effect on the biosynthesis of arseniccontaining phospholipids.Abstract. Seaweeds have recently been shown to contain a significant proportion of arsenic in the form of arsenolipids (AsLp). Three strains of the filamentous brown alga Ectocarpus species were grown in the laboratory with different simulations of environmental stress: control conditions (1/2 Provasoli-enriched seawater), low nitrate (30 % of the amount of nitrates in the control), low phosphate (30 % of the amount of phosphate in the control) and under oxidative stress levels (2 mM H 2 O 2 ). Generally, the major AsLp was an arsenic-containing hydrocarbon, AsHC360 (50-80 %), but additionally, several arsenic-containing phospholipids (AsPL) were identified and quantified using high-performance liquid chromatography-inductively coupled plasma mass spectrometry and electrospray ionisation mass spectrometry (HPLC-ICP-MS/ ESI-MS). The AsLps in cultures were compared with AsLps in Ectocarpus found in its natural habitat as well as with other brown filamentous algae. The AsLp and arsenosugar profiles differed depending on the experimental conditions. Under low phosphate conditions, a significant reduction of phosphorus-containing arsenosugars was noticed, and a significant increase of phosphate-containing AsLps was found when compared with the controls. Strains grown under oxidative stress showed a significant increase in AsLps as well as clear physiological changes.

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Section: Total Arsenic In the Ectocarpales And Culturessupporting

confidence: 65%

Environmental effects on arsenosugars and arsenolipids in Ectocarpus (Phaeophyta)

et al. 2016

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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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“…The Cd values in this research were higher than the maximum recommended level for Cd in the FAO/WHO (2001) standard for seaweed/vegetable, the South African limits for lettuce, the French limits for edible seaweeds (<0.5 μgg -1 dw, Besada et al, 2009) and the Australian and New Zealand limits for edible seaweeds (0.2 μgg -1 dw, Almela et al, 2002Almela et al, , 2006Besada et al, 2009). The high Cd concentrations in the current study could well have originated from the unfiltered seawater and/or the fertilizer (Shuuluka 2011).…”

Section: Discussionmentioning

confidence: 97%

“…Tissue metal contents are also potential hazard prediction indices for organisms and the environment when natural concentrations are higher than the maximum standard recommended by monitoring agencies (Ayers and Westcot, 1994;Almela et al, 2002Almela et al, , 2006Smith, 2009;Sánchez-Bayo et al, 2011). Macroalgae naturally take up elements like Na, K, Ca, Mg, Cl, I and Br from the surrounding water bodies.…”

Section: Introductionmentioning

confidence: 99%

Biofiltering and Uptake of Dissolved Nutrients by Ulva armoricana (Chlorophyta) in a Land-based Aquaculture System

Amosu

Robertson-Andersson²,

Kean³

et al. 2016

IJAB

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An on-land flow-through cultivation system was designed for the macroalgal species Ulva armoricana (Chlorophyta) to reduce the environmental impact of aquaculture effluent in coastal ecosystems as part of an integrated aquaculture system. The macroalgae was cultured in various enriched media at a stocking density of 500 kg wet weight/pond. Overall, U. armoricana was able to remove a greater percentage of inorganic nitrogen in the double fertilizer ratio. The total dissolved phosphate was higher in standard seawater. U. armoricana showed preference for bioaccumulation, with ranges as follows: zinc (9.908 -32.942 mg.kg ); and lead (none detected). Apart from the presence of cadmium (Cd), the algal biomass produced at the end of the experiment was of a relatively good quality with limited heavy metal contamination so that U. armoricana could be successfully used as a plant stimulant but not as part of a feed formulation for livestock and for the food industry. This study showed that U. armoricana can effectively be used as a biological filter for dissolved nutrient uptake from aquaculture effluents. The prospect of better management practices, based on the utilization of Ulva mariculture designs, bodes well for the aquaculture industry.

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Total arsenic, inorganic arsenic, lead and cadmium contents in edible seaweed sold in Spain

Cited by 172 publications

References 24 publications

Environmental effects on arsenosugars and arsenolipids in Ectocarpus (Phaeophyta)

Environmental effects on arsenosugars and arsenolipids in Ectocarpus (Phaeophyta)

Seaweed aquaculture in Norway: recent industrial developments and future perspectives

Biofiltering and Uptake of Dissolved Nutrients by Ulva armoricana (Chlorophyta) in a Land-based Aquaculture System

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