Reduction by Bimetallic Reactive Materials Containing Zero-valent Iron

Application of permeable reactive barriers near roads for chloride ions removal One of the most critical sources of pollutants are road run-offs. Road run-off is a complex mixture of toxicants e.g. heavy metals, de-icing agents, organic compounds and water suspensions of solid substances. One of the most negative impact on the environment has sodium chloride which is used as de-icing agent. In the case of incorrect environment protection in the vicinity of roads pollutants may migrate to groundwater causing hazard to sources of potable water. One of the methods to prevent the migration of pollutants to groundwater is imposing the flow of polluted water through a reactive material filling a permeable reactive barrier (PRB). This paper examines the feasibility of selected reactive materials for the reduction chlorides concentration in road run-offs. Four different reactive materials: zero valent-iron, activated carbon, zeolite and geza rock have been chosen for studies. The tests results indicated that the most popular reactive materials used in PRB technology, activated carbon and zero-valent iron, removed exhibited the highest efficiency in chloride ions removal. Moreover, the composition of road run-off in samples collected along roads in Warsaw was determinated.

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Assessment of the effect of reactive materials on the content of selected elements in Indian mustard grown in Cu-contaminated soils

Journal of Water and Land Development ◽

10.1515/jwld-2016-0005 ◽

2016 ◽

Vol 28 (1) ◽

pp. 53-60 ◽

Cited By ~ 4

Author(s):

Maja Radziemska ◽

Jerzy Jeznach ◽

Zbigniew Mazur ◽

Joanna Fronczyk ◽

Ayla Bilgin

Keyword(s):

Contaminated Soils ◽

Environmental Remediation ◽

Indian Mustard ◽

Calcium Content ◽

Positive Influence ◽

Zero Valent Iron ◽

Control Group ◽

Reactive Materials ◽

Phosphorus And Potassium ◽

Copper Contaminated

Abstract Zero-valent iron (ZVI) represent a promising agent for environmental remediation. The research was aimed to determine the influence of copper in doses of 0, 80, 150, 300, and 600 mg Cu·kg−1 of soil as well as ZVI, and lignite additives on the content of macroelements in the Indian mustard (Brassica juncea (L.) Czern.). The average accumulation of analyzing elements in Indian mustard grown in copper contaminated soil were found to follow the decreasing order Mg > Na > P > Ca > K > N. Soil contamination at 600 mg Cu·kg−1 of soil led to the highest increase in P, Mg, N, and Ca content. The application of ZVI had a positive influence on the average phosphorus and potassium content of Indian mustard. Moreover, the application of ZVI and lignite had a positive influence on the average Mg and Ca content in the above-ground parts of Indian mustard. From the analyzed reactive materials, the application of lignite was shown to be the most effective resulting in the decrease in the average nitrogen and calcium content when compared to the control crop. Calcium content in plants from the control group, without the addition of zero-valent iron, and powered lignite (control), was positively correlated with increasing doses of copper.

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Testing Permeable Reactive Barrier Media for Remediation of Uranium Plumes in Groundwater

Volume 3: Hazardous Waste; Engineered/Geological Barriers in Disposal Systems; L/ILW; Radioactive Waste From Research/Industries; Spent Fuel/HLW Disposal; Public Involvement; Remediation of Uranium Mining/Milling; LL/ILW; Clearance/Exemption Levels; Mgmt. of Fissile Material; HLW; Dismantling; Reversible/Irreversible Disposal; Waste Avoidance/Minimization; Decontamination; Liquid Waste; Radioactive Waste Processing; Transport of Spent Fuel/HLW; Solid HLW Confinement; QA/QC ◽

10.1115/icem2001-1263 ◽

2001 ◽

Author(s):

Dirk Mallants ◽

Hugo Moors ◽

Lian Wang ◽

Norbert Maes ◽

Hildegarde Vandenhove ◽

...

Keyword(s):

Iron Oxides ◽

Removal Efficiency ◽

Dissolved Inorganic Carbon ◽

Cost Effective ◽

Permeable Reactive Barriers ◽

Zero Valent Iron ◽

Permeable Reactive Barrier ◽

Carbonate Content ◽

Equilibration Time ◽

Reactive Materials

Abstract In-situ treatment of contaminated groundwater by means of permeable reactive barriers (PRBs) is becoming a cost-effective remediation technique. Various reactive materials that might be used in PRBs were tested in their ability to remove uranium from groundwater. Materials tested include ferric oxyhydroxides, coarse- and fine-grained zero-valent iron, aluminium-iron oxides, and zeolites. Batch tests were used to evaluate the removal efficiency of these materials. To analyse the effect of groundwater composition on the interaction between dissolved uranium and reactive materials, two types of groundwater were used, mainly differing in carbonate content and pH. Considering an equilibration time of 48 hours and initial uranium concentrations between 2.4 and 24 mg/1, finegrained zero-valent iron proved to be most effective with a uranium removal efficiency of more than 96% for carbon-rich groundwater and 99% for carbon-poor groundwater. Intermediate efficiency was observed for coarsegrained zero-valent iron and aluminium-iron oxides. Less than 10% of the dissolved uranium was adsorbed on the iron oxyhydroxides. Zeolites did not remove any uranium from solution. Results further indicated a positive correlation between dissolved inorganic carbon content and dissolved uranium at equilibrium. Because it can be easily obtained at a fairly low price, zero-valent iron is a promising material for use in PRBs.

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