Application of Nanozerovalent Iron for Water Treatment and Soil Remediation: Emerging Nanohybrid Approach and Environmental Implications

2018 ◽  
pp. 65-87 ◽  
Author(s):  
Nirupam Aich ◽  
Chunming Su ◽  
Ijung Kim ◽  
Arvid Masud
Keyword(s):  
Water Treatment ◽  
Soil Remediation ◽  
Environmental Implications

Environmental implications of soil remediation using the Fenton process

Chemosphere ◽  
2008 ◽  
Vol 71 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Ricardo D. Villa ◽  
Alam G. Trovó ◽  
Raquel F. Pupo Nogueira
Keyword(s):  
Soil Remediation ◽  
Fenton Process ◽  
Environmental Implications

Advances in the applications of graphene adsorbents: from water treatment to soil remediation

2019 ◽  
Vol 39 (1) ◽  
pp. 47-76 ◽  
Author(s):  
Lianqin Zhao ◽  
Sheng-Tao Yang ◽  
Ailimire Yilihamu ◽  
Deyi Wu
Keyword(s):  
Water Treatment ◽  
Surface Area ◽  
Soil Remediation ◽  
Membrane Separation ◽  
Chemical Properties ◽  
Honeycomb Lattice ◽  
Contaminated Water ◽  
Inorganic Pollutants ◽  
Carbon Allotrope ◽  
Potential Applications

AbstractGraphene, a novel carbon allotrope, is single-layered graphite with honeycomb lattice. Its unique structure endows graphene many outstanding physical/chemical properties and a large surface area, which are beneficial to its applications in many areas. The potential applications of graphene in pollution remediation are adsorption, membrane separation, catalysis, environmental analysis, and so on. The adsorption efficiency of graphene adsorbents largely depends on its surface area, porous structure, oxygen-containing groups and other functional groups, adsorption conditions, and also the properties of adsorbates. With appropriate modifications, graphene materials are mostly efficient adsorbents for organic pollutants (e.g. dyes, pesticides, and oils) and inorganic pollutants (e.g. metal ions, nonmetal ions, and gas). Since our first report of graphene adsorbents in 2010, plenty of studies have been dedicated to developing various graphene adsorbents and to evaluating their performance in treating contaminated water. Recently, there is a growing trend in graphene adsorbents that could be applied in soil remediation, where the situation is much more complicated than in aqueous systems. Herein, we review the design of graphene adsorbents for water treatment and analyze their potential in soil remediation. Several suggestions to accelerate the research on graphene-based soil remediation technology are proposed.

scholarly journals Image Analysis for Spectroscopic Elemental Dot Maps: P, Al, and Ca Associations in Water Treatment Residuals as a Case Study

2021 ◽  
Vol 2 ◽  
Author(s):  
Iris Zohar ◽  
Peleg Haruzi
Keyword(s):  
Image Analysis ◽  
Water Treatment ◽  
Quantitative Information ◽  
Dairy Wastewater ◽  
Chemical Behavior ◽  
Water Treatment Residuals ◽  
Environmental Implications ◽  
Water Pretreatment ◽  
Working Procedure

The associations of elements upon a heterogeneous surface may control nutrients or pollutants sorption and release, having agricultural and environmental implications. This chemical behavior can be elucidated by spatial spectroscopy, followed by image analysis. The purpose of this paper is to present a working procedure for image analysis using the free program ImageJ that can be applied for dot maps of three or more elements produced by solid-state spectroscopy. Detailed step-by-step instructions lead to visual and quantitative information regarding elements associations. The working procedure was demonstrated for P, Al and Ca dot maps produced by scanning electron microscopy energy dispersive spectroscopy (SEM-EDS) for surfaces of Al-based water treatment residuals (Al-WTRs), a by-product of drinking water pretreatment with alum coagulant. Al-WTR was reused to adsorb the macro-nutrient P from polluted soil leach and dairy wastewater (WW). Surficial P onto Al-WTR, SL-Al/O-WTR, and WW-Al/O-WTR (0.56, 0.93, and 2.15%, respectively) displayed sorption dynamics, mostly with Al and Ca. Quantification of the spatial proportions of individual elements and their associations indicated P-Al pool > P-Ca pool (45–24% and 17–7%, respectively). Upon introducing P-rich dairy wastewater, the behavior of P sorption by Al and Ca changed and became more clustered. A ternary phase of P-Al-Ca covered 38% of the area with signal, compared to 4.3 and 4.6% of the area in Al-WTR and SL-Al-WTR, where it was limited to particles edges only. Thus, the presented protocol may promote employing image analysis for geochemical applications, elucidating chemical behavior and affinities. Advantages and pitfalls are discussed.

scholarly journals Induced Mobilization of as Contained in Metallurgical Waste Using Electrokinetic Remediation Technology: Environmental Implications and Technical Limitations in soil Remediation of Orphan Mining Areas

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1412
Author(s):  
Antonio Luis Marqués Sierra ◽  
Cienfuegos P. ◽  
Álvarez R. ◽  
Ordoñez A. ◽  
Roqueñí N. ◽  
...  
Keyword(s):  
Soil Remediation ◽  
Field Work ◽  
Electrokinetic Remediation ◽  
Metallurgical Waste ◽  
Environmental Implications ◽  
Remediation Technology ◽  
Mining Areas ◽  
Electrokinetic Decontamination

This work focuses on the analysis of the electrokinetic decontamination of soils with high contents in As. Based on the data obtained from the laboratory on different materials in previous works. It has been sought to combine these with current laboratory and field work to infer the environmental and technical implementation implications of the As mobility in sediments and soils.

scholarly journals A Review on Montmorillonite-Supported Nanoscale Zerovalent Iron for Contaminant Removal from Water and Soil

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Yaru Yin ◽  
Wenjuan Zheng ◽  
An Yan ◽  
Chenxi Zhang ◽  
Yuxuan Gou ◽  
...  
Keyword(s):  
Water Treatment ◽  
Soil Remediation ◽  
Zerovalent Iron ◽  
Great Promise ◽  
Contaminant Removal ◽  
Future Directions ◽  
Practical Applications ◽  
The Past ◽  
Nanoscale Zerovalent Iron ◽  
Soil And Water

Nanoscale zerovalent iron (nZVI) has shown great promise for water treatment and soil remediation. However, the rapid aggregation of nZVIs significantly affects their mobility and reactivity, which considerably limits the practical applications. Montmorillonite- (Mt-) supported nZVI (Mt-nZVI) has received increasing attention for the past decade because it can prevent the aggregation of nZVI and incorporate the advantages of both nZVI and Mt in soil and water treatment. This work thus had a comprehensive review on the use of Mt-nZVI for soil and water treatment. We first summarized existing methods used to prepare Mt-nZVI, indicating the advantages of using Mt to support nZVI (e.g., increase of the dispersion and mobility of nZVI, reduction of the size and oxidation tendency of nZVI). We then presented the reaction mechanisms of Mt-nZVI for contaminant removal and evaluated the critical factors that influence the removal (e.g., pH, temperature, and dosage of the adsorbent). We further presented examples of applications of Mt-nZVI for the removal of typical contaminants such as heavy metals and organic compounds in soil and water. We finally discussed the limitations of the use of Mt-nZVI for water treatment and soil remediation and presented future directions for the application of nZVI technology for soil and water treatment.

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