Water decontamination by heterogeneous photo-Fenton processes over iron, iron minerals and iron-modified clays

2014 ◽  
pp. 235-254
Keyword(s):  
Water Decontamination ◽  
Modified Clays ◽  
Iron Minerals ◽  
Iron Iron

Stabilizing pyritic material

1989 ◽  
Vol 4 ◽  
pp. 244-248 ◽  
Author(s):  
Donald L. Wolberg
Keyword(s):  
Significant Contribution ◽  
Organic Materials ◽  
Sedimentary Rocks ◽  
Iron Sulfides ◽  
Decomposition Products ◽  
Iron Minerals ◽  
Pyrite Formation ◽  
Organic Sediments ◽  
Freshwater Environments

The minerals pyrite and marcasite (broadly termed pyritic minerals) are iron sulfides that are common if not ubiquitous in sedimentary rocks, especially in association with organic materials (Berner, 1970). In most marine sedimentary associations, pyrite and marcasite are associated with organic sediments rich in dissolved sulfate and iron minerals. Because of the rapid consumption of sulfate in freshwater environments, however, pyrite formation is more restricted in nonmarine sediments (Berner, 1983). The origin of the sulfur in nonmarine environments must lie within pre-existing rocks or volcanic detritus; a relatively small, but significant contribution may derive from plant and animal decomposition products.

Development of the water decontamination plant for swimming pools and study of its efficiency

2017 ◽  
Vol 0 (3) ◽  
Author(s):  
Volodymyr V. Blahodatnyi ◽  
Volodymyr I. Bieliavskyi ◽  
Anna S. Bashmakova
Keyword(s):  
Swimming Pools ◽  
Water Decontamination

Nano Zero Valent Iron Composites for Water Decontamination: A Review

2018 ◽  
Vol 5 (2) ◽  
pp. 88-101
Author(s):  
Nivedita Shukla ◽  
Amit Saxena ◽  
Vatsana Gupta ◽  
Ashok Singh Rawat ◽  
Sarita Shrivastava ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Water Decontamination ◽  
Nano Zero Valent Iron

DEGRADATION OF TCE BY IRON MINERALS AND AQUIFER MATERIALS

2018 ◽  
Author(s):  
Thomas Robinson ◽  
◽  
Michelle M. Scherer ◽  
Drew Latta ◽  
Timothy Mattes ◽  
...  
Keyword(s):  
Iron Minerals

scholarly journals The key role of contact time in elucidating the mechanisms of enhanced decontamination by Fe0/MnO2/sand systems

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Viet Cao ◽  
Ghinwa Alyoussef ◽  
Nadège Gatcha-Bandjun ◽  
Willis Gwenzi ◽  
Chicgoua Noubactep
Keyword(s):  
Contact Time ◽  
Diffusive Transport ◽  
Iron Hydroxides ◽  
Iron Corrosion ◽  
Short Term ◽  
Batch Studies ◽  
Water Decontamination ◽  
Co Precipitation

AbstractMetallic iron (Fe0) has shown outstanding performances for water decontamination and its efficiency has been improved by the presence of sand (Fe0/sand) and manganese oxide (Fe0/MnOx). In this study, a ternary Fe0/MnOx/sand system is characterized for its discoloration efficiency of methylene blue (MB) in quiescent batch studies for 7, 18, 25 and 47 days. The objective was to understand the fundamental mechanisms of water treatment in Fe0/H2O systems using MB as an operational tracer of reactivity. The premise was that, in the short term, both MnO2 and sand delay MB discoloration by avoiding the availability of free iron corrosion products (FeCPs). Results clearly demonstrate no monotonous increase in MB discoloration with increasing contact time. As a rule, the extent of MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the vessels (test-tubes). The presence of MnOx and sand enabled the long-term generation of iron hydroxides for MB discoloration by adsorption and co-precipitation. Results clearly reveal the complexity of the Fe0/MnOx/sand system, while establishing that both MnOx and sand improve the efficiency of Fe0/H2O systems in the long-term. This study establishes the mechanisms of the promotion of water decontamination by amending Fe0-based systems with reactive MnOx.

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