Metal Removal by Seaweed Biomass

Ortiz-Calderon, Claudia; Silva, Héctor Cid; Vásquez, Daniel Barros

doi:10.5772/65682

Cited by 14 publications

(17 citation statements)

References 82 publications

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“…Under optimised conditions, many algae strains have been shown to sequester up to tens (sometimes hundreds) of milligrams of metal per gram biomass . This elevated remediation potential has recently been attracting industrial interest, with some processes beginning to be commercialised . However, many challenges have yet to be addressed, especially regarding biomass reuse and metal recovery.…”

Section: Remediation Methodsmentioning

confidence: 99%

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Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

Raikova

Piccini

Surman

et al. 2019

J of Chemical Tech & Biotech

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Intense anthropogenic activity continues to expose the natural environment to heavy metal contamination. Whilst a number of physical and chemical solutions for remediation exist, the use of higher plants and algae for clean‐up of contaminated landscapes, termed ‘phytoremediation’ and ‘phycoremediation’, respectively, offer an attractive and sustainable alternative. However, these remediation processes will always lead to a high‐moisture, heavy metal‐contaminated biomass, which must be further processed to partition, or render inert, the metal contaminants. Conversion of this metal‐rich biomass into second‐generation biofuels offers a useful route to subsidise the economics of remediation activities. Here we briefly review the various methods for bioremediation of heavy metals, and discuss the potential to produce bioenergy from these biomass sources. Coupling the bioremediation activity to bioenergy production gives far‐reaching social and economic benefits; however, established processes such as direct combustion and anaerobic digestion risk releasing heavy metals back into the environment. Alternatively, thermochemical conversions such as pyrolysis or hydrothermal liquefaction (HTL) offer significant advantages in terms of the segregation of metals into a relatively inert and compact solid phase while producing a biocrude oil for bioenergy production. In addition, preliminary work suggests that the HTL process can also be used to partition essential macronutrients, such as N, P and K, into an aqueous medium, allowing additional nutrient recycling. © 2019 Society of Chemical Industry

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Section: Remediation Methodsmentioning

confidence: 99%

“…49,51 This elevated remediation potential has recently been attracting industrial interest, with some processes beginning to be commercialised. 51,58 However, many challenges have yet to be addressed, especially regarding biomass reuse and metal recovery.…”

Section: Phycoremediation Of Heavy Metals In Water By Microalgae and mentioning

confidence: 99%

Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

Raikova

Piccini

Surman

et al. 2019

J of Chemical Tech & Biotech

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“…particularly suitable to mitigate impacts from anthropogenic wastewaters because of their high productivity and resilience to diverse growing conditions [ 32 , 94 , 95 , 96 ]. This seaweed used in heavy metal bioremediation needs to be carefully used, and there is research to use seaweed to remove heavy metals for their recuperation, promoting a heavy metal circular economy [ 97 , 98 ]. In the agriculture field, ulvans improve plant immune responses [ 84 , 99 ].…”

Section: Seaweeds Biodiversity and Potential To Exploitationmentioning

confidence: 99%

The Evolution Road of Seaweed Aquaculture: Cultivation Technologies and the Industry 4.0

García-Poza

Leandro

Cotas

et al. 2020

IJERPH

144

108

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Seaweeds (marine macroalgae) are autotrophic organisms capable of producing many compounds of interest. For a long time, seaweeds have been seen as a great nutritional resource, primarily in Asian countries to later gain importance in Europe and South America, as well as in North America and Australia. It has been reported that edible seaweeds are rich in proteins, lipids and dietary fibers. Moreover, they have plenty of bioactive molecules that can be applied in nutraceutical, pharmaceutical and cosmetic areas. There are historical registers of harvest and cultivation of seaweeds but with the increment of the studies of seaweeds and their valuable compounds, their aquaculture has increased. The methodology of cultivation varies from onshore to offshore. Seaweeds can also be part of integrated multi-trophic aquaculture (IMTA), which has great opportunities but is also very challenging to the farmers. This multidisciplinary field applied to the seaweed aquaculture is very promising to improve the methods and techniques; this area is developed under the denominated industry 4.0.

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“…alginates and fucoidans, with functional groups capable of binding metal ions. Planting of seaweeds in wastewater reservoirs has been implemented in areas of effluent remediation areas (Ortiz-Calderon et al 2017 ; Michalak 2020a ). Recently, Pennesi et al ( 2019 ) illustrated how the rare metal indium could be recovered from e-waste (old electronic materials), much of which is exported to developing countries where workers (many of whom are children) burn circuit boards to recover precious and rare metals.…”

Section: Seaweeds Combating Pollutionmentioning

confidence: 99%

Saved by seaweeds: phyconomic contributions in times of crises

et al. 2020

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Seaweeds (macroalgae) are, together with microalgae, main contributors to the Earth’s production of organic matter and atmospheric oxygen as well as fixation of carbon dioxide. In addition, they contain a bounty of fibres and minerals, as well as macro- and micronutrients that can serve both technical and medicinal purposes, as well as be a healthy and nutritious food for humans and animals. It is therefore natural that seaweeds and humans have had a myriad of interwoven relationships both on evolutionary timescales as well as in recent millennia and centuries all the way into the Anthropocene. It is no wonder that seaweeds have also entered and served as a saviour for humankind around the globe in many periods of severe needs and crises. Indeed, they have sometimes been the last resort, be it during times of famine, warfare, outbreak of diseases, nuclear accidents, or as components of securing the fabric of social stability. The present topical review presents testimony from the history of human interaction with seaweeds to the way humankind has, over and over again, been ‘saved by seaweeds’. It remains a historical fact that in extreme conditions, such as shortage and wars, humans have turned to seaweeds in times of ‘needs must’ and created new opportunities for their uses in order to mitigate disasters. Lessons to be learned from this history can be used as reminders and inspiration, and as a guide as how to turn to seaweeds in current and inevitable, future times of crises, not least for the present needs of how to deal with changing climates and the pressing challenges of sustainable and healthy eating.

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Metal Removal by Seaweed Biomass

Cited by 14 publications

References 82 publications

Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

The Evolution Road of Seaweed Aquaculture: Cultivation Technologies and the Industry 4.0

Saved by seaweeds: phyconomic contributions in times of crises

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