Aging effects on chemical transformation and metal(loid) removal by entrapped nanoscale zero-valent iron for hydraulic fracturing wastewater treatment

Sun, Yuqing; Cheng, Lei; Khan, Eakalak; Chen, Season S.; Tsang, Daniel C.W.; Ok, Yong Sik; Lin, Daohui; Feng, Yujie; Li, Xiangzhong

doi:10.1016/j.scitotenv.2017.09.332

Cited by 56 publications

(11 citation statements)

References 48 publications

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“…The past three decades have been a period of an uncoordinated search of inexpensive, reactive Fe 0 materials (including nano-Fe 0 ) [117,118]. The inherent generation of FeCPs has been regarded as a curse for the system.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Selected Pretreatment Procedures on Iron Dissolution from Metallic Iron Specimens Used in Water Treatment

Ndé-Tchoupé

Lufingo

et al. 2019

Sustainability

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Studies were undertaken to determine the reasons why published information regarding the efficiency of metallic iron (Fe 0 ) for water treatment is conflicting and even confusing. The reactivity of eight Fe 0 materials was characterized by Fe dissolution in a dilute solution of ethylenediaminetetraacetate (Na 2 -EDTA; 2 mM). Both batch (4 days) and column (100 days) experiments were used. A total of 30 different systems were characterized for the extent of Fe release in EDTA. The effects of Fe 0 type (granular iron, iron nails and steel wool) and pretreatment procedure (socking in acetone, EDTA, H 2 O, HCl and NaCl for 17 h) were assessed. The results roughly show an increased iron dissolution with increasing reactive sites (decreasing particle size: wool > filings > nails), but there were large differences between materials from the same group. The main output of this work is that available results are hardly comparable as they were achieved under very different experimental conditions. A conceptual framework is presented for future research directed towards a more processed understanding.Sustainability 2019, 11, 671 2 of 20 organic [27,28], fluoride [29][30][31], heavy metals [32,33], nitrate [34,35], pathogens [36][37][38] and radionuclides [32,39]. The desalination of water using Fe 0 has also been reported [40][41][42][43]. The two key advantages of Fe 0 are its affordability and its universal availability (iron nails, scrap iron and steel wool) [9,10,44,45]. It is commonly reported that the major drawback of Fe 0 -based technologies for water treatment is the low intrinsic reactivity of granular materials [28,33,46]. This situation is said to be aggravated by the inherent generation of an oxide scale at the Fe 0 surface (passivation). Countermeasures to overcome Fe 0 passivation were recently reviewed by Guan et al. [28] and further discussed by Noubactep [47]. It is recalled that, considering passivation as a "curse" contradicts the evidence that Fe 0 -based subsurface permeable barriers have been successfully working for more than one decade [48][49][50]. On the other hand, increased "passivation" should have occurred in the spongy iron filters in Antwerpen as well [2,19]. Clarifying this contradiction is certainly a progress for the whole Fe 0 technology. Clearly, an understanding of the role of "passivation" in the process of decontamination using Fe 0 should be useful for enhancing the system's efficiency in practice [30,31,47].There is an agreement on the evidence that using Fe 0 for water treatment and environmental remediation is "putting corrosion to use" [51][52][53]. There is otherwise a contradiction on practically any other aspect concerning the Fe 0 /H 2 O system, including the reaction mechanisms and factors determining the long-term efficiency of such systems [9,28,47,[54][55][56][57][58]. A key reason for this is the large variability of experimental conditions used in testing Fe 0 materials [58][59][60][61][62]. The main influencing operational parameter seems to be Fe 0 itself [58,61,63,6...

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Section: Discussionmentioning

confidence: 99%

The Impact of Selected Pretreatment Procedures on Iron Dissolution from Metallic Iron Specimens Used in Water Treatment

Ndé-Tchoupé

Lufingo

et al. 2019

Sustainability

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“…However, owing to their nano-size and magnetic interactions, iron-based materials are susceptible to agglomeration that leads to decreased mobility and lower remediation efficiency for Cr(VI). Consequently, there have been several attempts to load iron-based materials on biochar to decrease particle agglomeration and enhance remediation efficiency (Cho et al, 2019;Qian et al, 2017;Su et al, 2016;Sun et al, 2017;Sun et al, 2018;Sun et al, 2019;Zhu et al, 2018a). For example, ZVI was linked to the carbonaceous surface within the biochar pore network using chitosan as a dispersing and binding reagent (Zhou et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Cr(VI) removal by magnetic greigite/biochar composites

Wang

Liu

et al. 2020

Science of The Total Environment

126

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“…In fact, to date, only a few studies assessed the toxicity of nZVI in marine organisms. In particular, nZVI has been demonstrated to cause a decrease in the growth rates in three species of phytoplankton [74] and a delay in embryo development in three free spawning invertebrates (M. galloprovincialis, Ciona intestinalis, and Psammechinus milliaris) [91,92].…”

Section: Metal and Metal Oxides Based Nanomaterialsmentioning

confidence: 99%

The Era of Nanomaterials: A Safe Solution or a Risk for Marine Environmental Pollution?

et al. 2021

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In recent years, the application of engineered nanomaterials (ENMs) in environmental remediation gained increasing attention. Due to their large surface area and high reactivity, ENMs offer the potential for the efficient removal of pollutants from environmental matrices with better performances compared to conventional techniques. However, their fate and safety upon environmental application, which can be associated with their release into the environment, are largely unknown. It is essential to develop systems that can predict ENM interactions with biological systems, their overall environmental and human health impact. Until now, Life-Cycle Assessment (LCA) tools have been employed to investigate ENMs potential environmental impact, from raw material production, design and to their final disposal. However, LCA studies focused on the environmental impact of the production phase lacking information on their environmental impact deriving from in situ employment. A recently developed eco-design framework aimed to fill this knowledge gap by using ecotoxicological tools that allow the assessment of potential hazards posed by ENMs to natural ecosystems and wildlife. In the present review, we illustrate the development of the eco-design framework and review the application of ecotoxicology as a valuable strategy to develop ecosafe ENMs for environmental remediation. Furthermore, we critically describe the currently available ENMs for marine environment remediation and discuss their pros and cons in safe environmental applications together with the need to balance benefits and risks promoting an environmentally safe nanoremediation (ecosafe) for the future.

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Aging effects on chemical transformation and metal(loid) removal by entrapped nanoscale zero-valent iron for hydraulic fracturing wastewater treatment

Cited by 56 publications

References 48 publications

The Impact of Selected Pretreatment Procedures on Iron Dissolution from Metallic Iron Specimens Used in Water Treatment

The Impact of Selected Pretreatment Procedures on Iron Dissolution from Metallic Iron Specimens Used in Water Treatment

Mechanism of Cr(VI) removal by magnetic greigite/biochar composites

The Era of Nanomaterials: A Safe Solution or a Risk for Marine Environmental Pollution?

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