Heavy metals in edible seaweeds commercialised for human consumption

Besada, V.; Andrade, J.M.; Schultze, F.; González, J.J.

doi:10.1016/j.jmarsys.2008.10.010

Cited by 217 publications

(160 citation statements)

References 25 publications

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“…Furthermore, rapid industrialization and economic development are reported in Malaysia leading to an increase in water pollution around coastal areas 5 . Moreover, seaweeds have high metal accumulation capacity as reported by Bersada et al 6 .…”

Section: Introductionmentioning

confidence: 76%

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2016

IJPSR

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Seaweed consumption is becoming more popular in Asian population especially the red seaweed, Kappaphycus alvarezii (K. alvarezii). However, there are few reported studies on the safety of K. alvarezii for consumption in Malaysia. This study focuses on the in vivo evaluation of toxicity and heavy metals of K. alvarezii performed in albino rats. K. alvarezii were sent for heavy metal analysis while methanolic extracts of K. alvarezii were administered orally to albino rats (2000mg/kg) daily for a total of 28 days according to Organization for Economic Co-operation and Development (OECD) guidelines. The water level and feed consumption of both groups were observed daily. At day 28th the control and experimental group of rats were sacrificed, blood and organs such as kidney and liver were collected and sent for haematology and biochemical analysis. There was low to no detectable concentration of heavy metals such as arsenic, iron and zinc in K. alvarezii. In addition, the low levels of heavy metals in the K. alvarezii samples did not cause toxicity in rats due to the results obtained from haematological test and biochemical parameters showed no significant different between experimental and control groups of rats under statistical analysis. It is therefore concluded that K. alvarezii which was proven to be rich in nutrients and antioxidants is safe for human consumption.

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Section: Introductionmentioning

confidence: 76%

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2016

IJPSR

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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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“…Seaweeds have been used for many different purposes, mainly for human consumption (Besada, Andrade, Schultze, & González, 2009) but also as a source of hydrocolloids, for animal nutrition, waste water treatment, paper industry, cosmetics, fertilizers and medical research (Cruz-Suárez et al, 2010;Lahaye & Jegou, 1993;McHugh, 2003). In general, seaweed natural stocks are insufficient to supply the increasing worldwide demand; as a consequence seaweeds culturing has been developed and provides now more than 90% of the seaweed market's demand (McHugh, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…There is little legislation on seaweeds in the European Union, so little control is exercised on potentially harmful metals. France was the first European country to set up regulations on the use of seaweeds for human consumption as non-traditional foods (Besada et al, 2009). Currently 12 macroalgae and 2 microalgae are authorised as vegetables and dressings/flavourings (Burtin, 2003).…”

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confidence: 99%

Chemical composition of cultivated seaweed Ulva clathrata (Roth) C. Agardh

Mawhinney²,

et al. 2011

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a b s t r a c tSamples of cultivated Ulva clathrata were collected from a medium scale system (MSS, 1.5 Â 1.5 m tank), or from a large scale system (LSS, 0.8 ha earthen pond). MSS samples were dried directly while the LSS sample was washed in freshwater and pressed before drying. Crude protein content ranged 20-26%, essential amino acids accounting for 32-36% of crude protein. The main analysed monosaccharides were rhamnose (36-40%), uronic acids (27-29%), xylose (10-13%) and glucose (10-16%). Some notable variations between MSS and LSS samples were observed for total dietary fibre (26% vs 41%), saturated fatty acids (31% vs 51%), PUFAS (33% vs 13%), carotenoids (358 vs 169 mg kg À1 dw) and for Ca (9 vs 19 g kg ). The chemical composition of U. clathrata indicates that it has a good potential for its use in human and animal food.

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Heavy metals in edible seaweeds commercialised for human consumption

Cited by 217 publications

References 25 publications

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Seaweed aquaculture in Norway: recent industrial developments and future perspectives

Chemical composition of cultivated seaweed Ulva clathrata (Roth) C. Agardh

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