Green synthesis of nanoparticles for the remediation of contaminated waters and soils: Constituents, synthesizing methods, and influencing factors

Wang, Yinan; O’Connor, David; Shen, Zhengtao; Lo, Irene M.C.; Tsang, Daniel C.W.; Pehkonen, Simo O.; Pu, Shengyan; Hou, Deyi

doi:10.1016/j.jclepro.2019.04.128

Cited by 161 publications

(40 citation statements)

References 108 publications

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“…Green and sustainable remediation (GSR) is a new movement in the land and groundwater remediation field that has drawn much attention globally in recent years, and it requires consideration of the environmental, economic, and social dimensions of sustainability. GSR technologies for contaminated groundwater, including biochar materials, green synthesis of engineered nanoparticles [52], sustainable PRB [53] and sustainably released long-term green remediation materials, have made rapid progress. However, case studies indicate that public participation must be improved to promote social sustainability, and region-specific factors should be considered when implementing GSR.…”

Section: Discussionmentioning

confidence: 99%

Past, Present, and Future of Groundwater Remediation Research: A Scientometric Analysis

Chen

Fan

Wei³

et al. 2019

IJERPH

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In this study, we characterize the body of knowledge of groundwater remediation from 1950 to 2018 by employing scientometric techniques and CiteSpace software, based on the Science Citation Index Expanded (SCI-E) databases. The results indicate that the United States and China contributed 56.4% of the total publications and were the major powers in groundwater remediation research. In addition, the United States, Canada, and China have considerable capabilities and expertise in groundwater remediation research. Groundwater remediation research is a multidisciplinary field, covering water resources, environmental sciences and ecology, environmental sciences, and engineering, among other fields. Journals such as Environmental Science and Technology, Journal of Contaminant Hydrology, and Water Research were the major sources of cited works. The research fronts of groundwater remediation were transitioning from the pump-and-treat method to permeable reactive barriers and nanoscale zero‑valent iron particles. The combination of new persulfate ion‑activation technology and nanotechnology is receiving much attention. Based on the visualized networks, the intelligence base was verified using a variety of metrics. Through landscape portrayal and developmental trajectory identification of groundwater remediation research, this study provides insight into the characteristics of, and global trends in, groundwater remediation, which will facilitate the identification of future research directions.

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Section: Discussionmentioning

confidence: 99%

Past, Present, and Future of Groundwater Remediation Research: A Scientometric Analysis

Chen

Fan

Wei³

et al. 2019

IJERPH

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“…It is found that the initial pH value has a significant impact on the removal rate of Cr(VI) in soil, no matter what kind of nZVI is wrapped by modified materials [74]. More specifically, the pH value and the Cr(VI) removal rate show a negative correlation [75], that is, with the rising pH value, the Cr(VI) removal rate declines [76].…”

Section: Effect Of the Initial Ph Valuementioning

confidence: 98%

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Chen

et al. 2020

Nanotechnology Reviews

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Chromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

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“…[Gallocatechin-(4alpha->8)]2-catechin and Cinnamtannin A3) also have antibacterial properties [78][79][80], indicating a stressor on the growth of certain bacteria in the permafrost. We highlight the fact that certain metabolites are naturally produced by microbial fermentation of plant residues (see epicatechin production by the fermentation of green tea in Jiang et al [81] which explains the presence of plant producing metabolites in our samples.…”

Section: Plos Onementioning

confidence: 99%

The role of changing temperature in microbial metabolic processes during permafrost thaw

et al. 2020

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Approximately one fourth of the Earth's Northern Hemisphere is underlain by permafrost, earth materials (soil, organic matter, or bedrock), that has been continuously frozen for at least two consecutive years. Numerous studies point to evidence of accelerated climate warming in the Arctic and sub-Arctic where permafrost is located. Changes to permafrost biochemical processes may critically impact ecosystem processes at the landscape scale. Here, we sought to understand how the permafrost metabolome responds to thaw and how this response differs based on location (i.e. chronosequence of permafrost formation constituting diverse permafrost types). We analyzed metabolites from microbial cells originating from Alaskan permafrost. Overall, permafrost thaw induced a shift in microbial metabolic processes. Of note were the dissimilarities in biochemical structure between frozen and thawed samples. The thawed permafrost metabolomes from different locations were highly similar. In the intact permafrost, several metabolites with antagonist properties were identified, illustrating the competitive survival strategy required to survive a frozen state. Interestingly, the intensity of these antagonistic metabolites decreased with warmer temperature, indicating a shift in ecological strategies in thawed permafrost. These findings illustrate the impact of change in temperature and spatial variability as permafrost undergoes thaw, knowledge that will become crucial for predicting permafrost biogeochemical dynamics as the Arctic and Antarctic landscapes continue to warm.

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Green synthesis of nanoparticles for the remediation of contaminated waters and soils: Constituents, synthesizing methods, and influencing factors

Abstract: Green synthesis of nanoparticles for the remediation of contaminated waters and soils: constituents, synthesizing methods, and influencing factors, (2019),

Cited by 161 publications

References 108 publications

Past, Present, and Future of Groundwater Remediation Research: A Scientometric Analysis

Past, Present, and Future of Groundwater Remediation Research: A Scientometric Analysis

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

The role of changing temperature in microbial metabolic processes during permafrost thaw

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