Difference between revisions of "Iron filings (ZVI)"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
(Created page with "==What is it?== ZVI is scrap iron filings and describes the elemental form of iron with a zero charge carried by each atom – a result of the outer valence level being filled...")
 
 
(8 intermediate revisions by 3 users not shown)
Line 1: Line 1:
 +
[[File:Železo.png|thumb|ZVI]]
 
==What is it?==
 
==What is it?==
ZVI is scrap iron filings and describes the elemental form of iron with a zero charge carried by each atom – a result of the outer valence level being filled. ZVI is able to remove phosphate from solution through precipitation. <ref name=Rossetti>Rossetti M. Evaluation of phosphorous removals by biochar supported nano-scale zero-valent iron. 2017. Chemical Engineering Undergraduate Honors Theses.</ref> Zero-valent iron nanoparticles (nZVI) are also used for phosphorus removal.
+
Iron filings or zero-valent iron (ZVI) is the elemental form of iron with a zero charge carried by each atom – a result of the outer valence level being filled. ZVI is able to remove dissolved phosphorus (phosphate) from solution through precipitation. <ref name=Rossetti>Rossetti M. Evaluation of phosphorous removals by biochar supported nano-scale zero-valent iron. 2017. Chemical Engineering Undergraduate Honors Thesis.</ref> Zero-valent iron nanoparticles (nZVI) are also used for [[phosphorus]] removal.
 +
 
 
==How is it being used?==
 
==How is it being used?==
 
No projects that use ZVI were found in Ontario.  
 
No projects that use ZVI were found in Ontario.  
 
==Benefits==
 
==Benefits==
A study was done that compared the phosphorus reduction capabilities of ZVI, biochar, biochar-supported ZVI (ZVI/BC), and biochar-supported nZVI (nZVI/BC). <ref name=Rossetti/> It was found that nZVI/BC had the highest phosphorus reduction. Using biochar-supported ZVI or nZVI improves the dispersion and stability of the iron filings. Biochar is fine-grained and highly porous, providing a large surface area to support nZVI.
+
A study was done that compared the phosphorus reduction capabilities of ZVI, [[biochar]], biochar-supported ZVI (ZVI/BC), and biochar-supported nZVI (nZVI/BC). <ref name=Rossetti/> It was found that nZVI/BC had the highest phosphorus reduction. Using biochar-supported ZVI or nZVI improves the dispersion and stability of the iron filings. Biochar is fine-grained and highly porous, providing a large surface area to support nZVI.
 
Another paper reports that ZVI can remove up to 98% of influent phosphorus at low input concentrations, and at high concentrations is shown to remove up to 36% of incoming phosphorus. The phosphorus retained in the soil is mostly iron-bound, which will not be easily leached out of the system because it is very stable.<ref>Lechner L. Phosphorus Removal From Stormwater Using Zero-Valent Iron. 2016. Applied Science Masters Thesis.</ref>  
 
Another paper reports that ZVI can remove up to 98% of influent phosphorus at low input concentrations, and at high concentrations is shown to remove up to 36% of incoming phosphorus. The phosphorus retained in the soil is mostly iron-bound, which will not be easily leached out of the system because it is very stable.<ref>Lechner L. Phosphorus Removal From Stormwater Using Zero-Valent Iron. 2016. Applied Science Masters Thesis.</ref>  
  
<references/>
+
==References==
 +
[[category:materials]]
 +
[[category:phosphorus]]
 +
[[Category: Water quality]]

Latest revision as of 20:39, 27 September 2022

ZVI

What is it?[edit]

Iron filings or zero-valent iron (ZVI) is the elemental form of iron with a zero charge carried by each atom – a result of the outer valence level being filled. ZVI is able to remove dissolved phosphorus (phosphate) from solution through precipitation. [1] Zero-valent iron nanoparticles (nZVI) are also used for phosphorus removal.

How is it being used?[edit]

No projects that use ZVI were found in Ontario.

Benefits[edit]

A study was done that compared the phosphorus reduction capabilities of ZVI, biochar, biochar-supported ZVI (ZVI/BC), and biochar-supported nZVI (nZVI/BC). [1] It was found that nZVI/BC had the highest phosphorus reduction. Using biochar-supported ZVI or nZVI improves the dispersion and stability of the iron filings. Biochar is fine-grained and highly porous, providing a large surface area to support nZVI. Another paper reports that ZVI can remove up to 98% of influent phosphorus at low input concentrations, and at high concentrations is shown to remove up to 36% of incoming phosphorus. The phosphorus retained in the soil is mostly iron-bound, which will not be easily leached out of the system because it is very stable.[2]

References[edit]

  1. 1.0 1.1 Rossetti M. Evaluation of phosphorous removals by biochar supported nano-scale zero-valent iron. 2017. Chemical Engineering Undergraduate Honors Thesis.
  2. Lechner L. Phosphorus Removal From Stormwater Using Zero-Valent Iron. 2016. Applied Science Masters Thesis.