Hydrochar from <i>Sargassum muticum</i>: a sustainable approach for high-capacity removal of Rhodamine B dye

Spagnuolo, Damiano; Iannazzo, Daniela; Len, Thomas; Balu, Alina M.; Morabito, Marina; Genovese, Giuseppa; Espro, Claudia; Bressi, Viviana

doi:10.1039/d3su00134b

Cited by 13 publications

(6 citation statements)

References 66 publications

(67 reference statements)

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“…For example, phytochemicals from S. wightii were found to be effective against the mosquito Aedes aegypti [78], extracts from S. linearifolium exhibited antioxidant, antimicrobial, and anticancer activities [79], and those from S. horneri bio-stimulated the growth of the red algae Neopyropia yezoensis [80]. Additionally, hydrochar obtained from S. muticum demonstrated a high capacity to remove pollutants from water [81]. The valorization of pelagic Sargassum is essential to offset the elevated cleanup cost and to mitigate ecological, economic, and human health-related impacts.…”

Section: Discussionmentioning

confidence: 99%

Pelagic Sargassum as a Potential Vector for Microplastics into Coastal Ecosystems

Aldana Arana,

Gil Cortés,

Castillo Escalante

et al. 2024

Phycology

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Macroalgal blooms are increasing globally, with those linked to pelagic Sargassum affecting over 30 nations since 2011. As Sargassum mats traverse the Atlantic Ocean and the Caribbean Sea, they entrap and transport plastic to coastal areas, intensifying pollution in diverse ecosystems. This research assessed microplastics (MPs) within Sargassum fluitans III collected from the northern Mexican Caribbean coast (March 2021 to January 2022). The study employed a hydrogen peroxide protocol for macroalgae pretreatment to optimize MP extraction. All samples analyzed contained MPs at monthly mean concentrations that ranged from 3.5 to 15.3 MPs g−1 DW, with fibers constituting ≥90%. Fiber colors, mainly transparent, blue, and black, exhibited diverse sizes and wear stages. The study underscores the pervasive and consistent presence of MPs in pelagic Sargassum reaching the Mexican Caribbean. Considering the documented Sargassum influxes to this coast in recent years (2789–11,297 tons km−1 yr−1), potential annual MP influxes range from 0.1 × 109 to 17.3 × 109 km−1 yr−1. Efficiently removing beach-cast Sargassum and directing it to landfills could serve as a viable strategy for the simultaneous removal of attached MPs from the ocean and coastal waters, offering a promising mitigation strategy to combat plastic pollution in the examined marine environment.

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Section: Discussionmentioning

confidence: 99%

Pelagic Sargassum as a Potential Vector for Microplastics into Coastal Ecosystems

Aldana Arana,

Gil Cortés,

Castillo Escalante

et al. 2024

Phycology

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“…5,6 Chemical processes including oxidation and photodegradation have associated issues such as high costs and energy consumption, with the risk of undesired by-products. 7 Biological methods, i.e. microbial biomass adsorption and decolourization, demand prolonged residence times and lack stability 8 while physical approaches including membrane filtration and adsorption offer cost-effective solutions and exhibit superior efficiency in removal compared to detection analysis.…”

Section: Introductionmentioning

confidence: 99%

“…microbial biomass adsorption and decolourization, demand prolonged residence times and lack stability 8 while physical approaches including membrane filtration and adsorption offer cost-effective solutions and exhibit superior efficiency in removal compared to detection analysis. 7 Electrochemical sensors have garnered considerable attention in recent years due to their exceptional versatility in chemically analyzing heavy metal ions. 9,10 In recent years, carbon nanodots (CNDs) have emerged as a promising material for detecting heavy metal ions, owing to their ease of use, low cost, exceptional fluorescence 11,12 and electrochemical and sensing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Waste-derived carbon nanodots for fluorimetric and simultaneous electrochemical detection of heavy metals in water

Bressi,

Celesti,

Ferlazzo

et al. 2024

Environ. Sci.: Nano

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“…Microwave hydrothermal carbonization is a route to convert seaweed into value-added products, such as hydrochar [20]. Algal biomass is converted into hydrochar by the hydrothermal method, which depends on factors such as the reaction temperature, time, biomass particle size, and the amount of catalyst and biomass needed for the maximum hydrochar yield [20][21][22]. Researchers have used Laminaria digitata alga to produce hydrochar.…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of Biological and Organic Fertilizers on Agrobiochemical Traits of Corn (Zea mays L.) under Wastewater Irrigation

Shirzad,

Siavash Moghaddam,

Rahimi

et al. 2024

Plants

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Corn (Zea mays L.) is an important annual grain that is cultivated as a food staple around the world. The current study examined the effect of wastewater and a combination of biological and organic fertilizers on the morphological and phytochemical traits of corn, using a factorial experiment based on a randomized complete block design with three replications. The first factor was biological and organic fertilizers at seven levels, including the control (no fertilization), bacterial biological fertilizers (NPK) along with iron and zinc Barvar biofertilizers, fungal biofertilizers made from Mycorrhiza and Trichoderma, biochar, a combination of bacterial and fungal biofertilizers, and a combination of bacterial and fungal biofertilizers with biochar. The second factor was irrigation at two levels (conventional irrigation and irrigation with wastewater). The traits studied included the morphological yield, phenols, flavonoids, polyphenols, glomalin, cadmium content in plant parts, and translocation factor (TF). The results disclosed that the best treatment in regard to the morphological traits was related to conventional water + biochar + mycorrhiza + Trichoderma + NPK. The highest phenol and flavonoid content were observed when biochar + mycorrhiza + Trichoderma + NPK treatments were used in both water treatments. Also, the wastewater + biochar + mycorrhiza + Trichoderma + NPK treatment demonstrated the highest total glomalin and phenylalanine ammonia-lyase (PAL) activity. The obtained results demonstrate that combined biological and organic fertilizer use on corn plants can effectively alleviate the deleterious effects of cadmium present in wastewater.

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Hydrochar from Sargassum muticum: a sustainable approach for high-capacity removal of Rhodamine B dye

Abstract: An invasive macroalga biomass was valorised by hydrothermal carbonization. The resultant carbonaceous materials exhibited efficient adsorption of hazardous organic pollutants in water due to their favourable physicochemical and textural properties.

Cited by 13 publications

References 66 publications

Pelagic Sargassum as a Potential Vector for Microplastics into Coastal Ecosystems

Pelagic Sargassum as a Potential Vector for Microplastics into Coastal Ecosystems

Waste-derived carbon nanodots for fluorimetric and simultaneous electrochemical detection of heavy metals in water

Combined Effect of Biological and Organic Fertilizers on Agrobiochemical Traits of Corn (Zea mays L.) under Wastewater Irrigation

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