Synthesis, characterization and application of starch stabilized zerovalent iron nanoparticles in the remediation of Pb-acid battery soil

Okuo, J. M.; Emina, Anwuli; Omorogbe, Stanley O.; Anegbe, B.

doi:10.1016/j.enmm.2017.11.004

Cited by 14 publications

(9 citation statements)

References 24 publications

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“…In addition, our result coincides with the conclusions drawn by Gil-Díaz et al 15 , who observed a higher immobilization effect for Pb than for Zn under the same conditions. Due to the high pH of nZVI, when these nanoparticles come into contact with the soil, they become excellent electron donors, thereby reducing Pb 2+ ions to Pb 0 or other insoluble forms 53 . Zn has a more negative reduction potential (−0.76 V) than Fe 0 (−0.40 V) and is therefore immobilized by adsorption.…”

Section: Discussionmentioning

confidence: 99%

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Baragaño

Forján

Welte

et al. 2020

Sci Rep

111

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the capacity of graphene oxide nanoparticles (nGox) to reduce or increase As and metals availability in polluted soils was compared with that of zero valent iron nanoparticles (nZVi). the nanomaterials used in this study were characterized by X-ray techniques, cHnS-o analysis, dynamic light scattering, and microscopy procedures such as atomic force microscopy. to assess the capacity of these materials to immobilize pollutants, field samples of two soils were treated with nZVI and nGOx at a range of doses (0.2%, 1% and 5%). Availability tests were then performed. nGOx effectively immobilized Cu, Pb and cd, but mobilized As and p (even at low doses), in the latter case irrespective of the simultaneous presence of high concentrations of metals. in turn, nZVi promoted notable immobilization results for As and pb, a poorer result for cd, and an increased availability for cu. Soil pH and ec have been slightly affected by nGOx. On the whole, nGOx emerges as a promising option for mobilization/immobilization strategies for soil nanoremediation when combined with other techniques such as phytoremediation. Industrial activities have released large amounts of metals (Cu, Cd, Pb, Zn, etc.) and metalloids (especially As) into the environment and caused serious damage to the ecosystem 1. In addition, metals and metalloids can endanger human health, as many of them are toxic even at very low concentrations, and even carcinogenic (e.g. As) and mutagenic 2. Unlike organic pollutants that can degrade into harmless small molecules, the abovementioned inorganic pollutants are recalcitrant to many biochemical reactions and thus particularly difficult to remove from soils 3. Regarding As, several studies have confirmed that between 52,000 and 112,000 tons of this metalloid are released into the environment every year 1,4,5. Many diseases, such as lung cancer, skin cancer, bladder cancer, etc., can be caused by contact with As 6,7. Given that As is highly toxic for humans, and also for plants and animals, it has been classified as a priority hazardous pollutant. Unlike the aforementioned metals, As is an anionic contaminant. In this regard, simultaneous remediation of soils affected by anionic and cationic contaminants is a challenge 8 ; i.e., As remediation is even more complex in contexts of concurrent pollution with metals. In fact, classical remediation approaches attempt, among other objectives, to raise the pH of soils contaminated with cationic metals and thus stabilize them. However, this approach causes As to be solubilized 9. Overall, the various remediation strategies available focus on the disjuncture between immobilization and mobilization of the pollutants 10. Soil nanoremediation by means of Fe-nanoparticles (nZVI) simultaneously reduces the availability of As and metals in polluted soils, as shown in recent pilot-scale in situ trials 11 , and by means of hybrid soil-washing techniques 12. nZVI have a Fe° core surrounded by an oxide/hydroxide shell, which grows thicker as iron oxidation progresses. In addition, nZVI pres...

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Section: Discussionmentioning

confidence: 99%

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Baragaño

Forján

Welte

et al. 2020

Sci Rep

111

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“…Starch-stabilized Fe/Cu As 2+ and As 5+ removal from the contaminated water [46] Starch/Fe 3 O 4 Removal of perfluorooctanoic acid (PFOA) in soil and groundwater [47] Starch/nZVI Soil remediation-heavy metal removal, particularly Pb and Zn [48] Starch/nZVI Removal of As 3+ and As 5+ from aqueous solutions [49] Starch-modified nZVI Removal of Cr 6+ [50] Starch/SnO…”

Section: Starch Hybrid Nanomaterials Application Referencementioning

confidence: 99%

Starch-Based Hybrid Nanomaterials for Environmental Remediation

Gamage¹,

Thiviya²,

Madhujith³

2022

Biochemistry

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Environmental pollution is becoming a major global issue with increasing anthropogenic activities that release massive toxic pollutants into the land, air, and water. Nanomaterials have gained the most popularity in the last decades over conventional methods because of their high surface area to volume ratio and higher reactivity. Nanomaterials including metal, metal oxide, zero-valent ions, carbonaceous nanomaterials, and polymers function as adsorbents, catalysts, photocatalysts, membrane (filtration), disinfectants, and sensors in the detection and removal of various pollutants such as heavy metals, organic pollutants, dyes, industrial effluents, and pathogenic microbial. Polymer-inorganic hybrid materials or nanocomposites are highly studied for the removal of various contaminants. Starch, a heteropolysaccharide, is a natural biopolymer generally incorporated with other metal, metal oxide, and other polymeric nanoparticles and has been reported in various environmental remediation applications as a low-cost alternative for petroleum-based polymers. Therefore, this chapter mainly highlights the various nanomaterials used in environmental remediation, starch-based hybrid nanomaterials, and their application and limitations.

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“…Starch-stabilized zero-valent iron nanoparticles were synthesized by Okuo et al [ 138 ] with the purpose of being used as potential synthetic immobilizing agents in the remediation of soils contaminated with Pb, Cr, Ni, and Cd. VSM analysis showed that starch-stabilized zero-valent iron nanoparticles were superparamagnetic.…”

Section: Starchmentioning

confidence: 99%

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

2021

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The call to use biodegradable, eco-friendly materials is urgent. The use of biopolymers as a replacement for the classic petroleum-based materials is increasing. Chitosan and starch have been widely studied with this purpose: to be part of this replacement. The importance of proper physical characterization of these biopolymers is essential for the intended application. This review focuses on characterizations of chitosan and starch, approximately from 2017 to date, in one of their most-used applications: food packaging for chitosan and as an adsorbent agent of pollutants in aqueous medium for starch.

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Synthesis, characterization and application of starch stabilized zerovalent iron nanoparticles in the remediation of Pb-acid battery soil

Cited by 14 publications

References 24 publications

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Nanoremediation of As and metals polluted soils by means of graphene oxide nanoparticles

Starch-Based Hybrid Nanomaterials for Environmental Remediation

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

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