Efficacy of two seaweeds dry mass in bioremediation of heavy metal polluted soil and growth of radish (Raphanus sativus L.) plant

Ahmed, Dalia A.; Gheda, Saly F.; Ismail, Gehan A.

doi:10.1007/s11356-020-11289-8

Cited by 32 publications

(17 citation statements)

References 58 publications

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“…Moreover, seaweeds have the potential to provide an efficient, eco‐friendly and low‐cost remediation method to reduce or remove toxic heavy metals from the environment (He and Chen, 2014 ; Ahmed et al ., 2021 ), particularly because the properties of the cell wall constituents alginate and fucoidan facilitate heavy metal chelation (Davis et al ., 2003 ). Seaweeds, which are among the most promising biosorbants, exhibit efficient metal biosorption capacity because they have several active functional groups (e.g., polysaccharides, proteins, amino, hydroxyl, carboxyl and sulfate) on their cell wall surfaces that serve as binding sites for metal (as reviewed in Ahmed et al ., 2021 ). To date, different kinds of seaweed, including the brown seaweed Sargassum filipendula (Verma et al ., 2016 ) and the red seaweeds Osmundea pinnatifida (Tsekova et al ., 2010 ) and Chondracanthus chamissoi (Yipmantin et al ., 2011 ), have been used to remove heavy metals.…”

Section: Ecological Applicationsmentioning

confidence: 99%

The seaweed holobiont: from microecology to biotechnological applications

Ren

Liu

Wang

et al. 2022

Microbial Biotechnology

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In the ocean, seaweed and microorganisms have coexisted since the earliest stages of evolution and formed an inextricable relationship. Recently, seaweed has attracted extensive attention worldwide for ecological and industrial purposes, but the function of its closely related microbes is often ignored. Microbes play an indispensable role in different stages of seaweed growth, development and maturity. A very diverse group of seaweed-associated microbes have important functions and are dynamically reconstructed as the marine environment fluctuates, forming an inseparable 'holobiont' with their host. To further understand the function and significance of holobionts, this review first reports on recent advances in revealing seaweed-associated microbe spatial and temporal distribution. Then, this review discusses the microbe and seaweed interactions and their ecological significance, and summarizes the current applications of the seaweed-microbe relationship in various environmental and biological technologies. Sustainable industries based on seaweed holobionts could become an integral part of the future bioeconomy because they can provide more resource-efficient food, high-value chemicals and medical materials. Moreover, holobionts may provide a new approach to marine environment restoration.

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Section: Ecological Applicationsmentioning

confidence: 99%

The seaweed holobiont: from microecology to biotechnological applications

Ren

Liu

Wang

et al. 2022

Microbial Biotechnology

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“…Both organic fertilizers and other methods of increasing SOM play a role in reclaiming land and Organic Fertilizers combatting desertification [8, 37,59,99,[114][115][116]. Several solutions to the issue of polluted water [26,106] have been suggested, including phytoremediation or the use of agricultural waste to serve as biosorbants [117][118][119].…”

Section: Water Conservation and Pollution Preventionmentioning

confidence: 99%

The Role of Organic Fertilizers in Transition to Sustainable Agriculture in the MENA Region

Avery¹

2022

New Generation of Organic Fertilizers

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Organic fertilizers can serve as an element of transitions to sustainable low-input agriculture in semi-arid regions of the MENA region. They play a key role in supporting soil biota and soil fertility. Yield improvements, availability and relatively low costs make organic fertilizers an attractive alternative for farmers. In semi-arid regions, important considerations are improved soil quality, which in turn affects soil water retention, while better root development helps crops resist heat and water stress. Organic fertilizers thus support climate adaptation and regional food security. Soil quality is crucial for carbon sequestration, at the same time that increased nutrient retention reduces impacts of agricultural runoff on groundwater and water bodies. Factors that impede the generalised use of organic fertilizers include lack of expertise, subsidy structures, constraints of the wider food and agricultural systems, and difficulties in transitioning from conventional agriculture. Such obstacles are aggravated in countries affected by security issues, financial volatility or restrictions in access to market. Against the background of both general and local constraints, the chapter examines possible pathways to benefit from organic fertilizers, in particular synergies with other sustainable agricultural practices, as well as improved access to expertise.

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“…e polysaccharides undergo other chemical transformations which additionally alter their chemical interaction with the soil elements [11,14,15]. Because of these properties, seaweed has been successfully investigated and used for remediation of soils contaminated with heavy metals [14,15], however, not yet been investigated for anionic species particularly, fluoride in the soil.…”

Section: Introductionmentioning

confidence: 99%

Remediation of Soils Contaminated by Fluoride Using a Fermentation Product of Seaweed (Eucheuma cottonii)

Moirana

Mkunda

Paradelo

et al. 2022

Applied and Environmental Soil Science

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This study investigated the efficacy of fermented seaweed (Eucheuma cottonii) on the remediation of fluoride-contaminated soil. The soil was amended with either 1.25, 3.0, or 5.0% (w/w) fermented seaweed (FSW), parallel with the controls (0%). The amendment improved the physicochemical properties of the soil particularly pH regulated from strong alkaline (9.3) to neutral (7.0) which is essential for germination, crop growth, and yield. The amount of water soluble-fluoride (Ws-F) dropped from 81.7 ± 3.1 mg/kg to 42.7 ± 2.4, 33.7 ± 1.2, 19.6 ± 0.9, and 12 ± 1.3 mg/kg following 0, 1.25, 3, and 5% amendment dosage, respectively. Most of the Ws-F was converted into exchangeable fluoride (Ex-F) and to fluoride-bound to iron and manganese (Fe/Mn-F). Furthermore, the amendment also enhanced microbial mass and diversity in the soil. The FSW contains organic acids which participate in ionic bonding with the multivalent cations in the soil. The formed compound participates in ion exchange with clay or with anionic adsorption to positively charged clay sites at the edges. This interaction is further essential for enhancing the fluoride holding capacity of the soil. The use of seaweed reduced the bioavailability of fluoride in the agricultural soils and had positive effects on promoting soil fertility. However, further studies to observe its effects on crop performance is of significance.

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Efficacy of two seaweeds dry mass in bioremediation of heavy metal polluted soil and growth of radish (Raphanus sativus L.) plant

Cited by 32 publications

References 58 publications

The seaweed holobiont: from microecology to biotechnological applications

The seaweed holobiont: from microecology to biotechnological applications

The Role of Organic Fertilizers in Transition to Sustainable Agriculture in the MENA Region

Remediation of Soils Contaminated by Fluoride Using a Fermentation Product of Seaweed (Eucheuma cottonii)

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