Difference between revisions of "Additives"

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A number of granular amendments have been demonstrated to improve nutrient removal from discharge water in BMPs such as [[bioretention cells]], [[absorbent landscapes]], [[sand filters]] or [[green roofs]].  
A number of granular amendments have been demonstrated to improve nutrient removal from discharge water in BMPs such as [[bioretention]] systems, [[absorbent landscapes]], [[sand filters]] or [[green roofs]].  
There are two primary processes involved, precipitation and adsorption. Both mechanisms are ultimately finite, but have been shown in come cases to make significant improvements on the discharged water quality over several years.
There are two primary processes involved, chemical precipitation and adsorption. Both mechanisms are ultimately finite, but have been shown in come cases to make significant improvements on the discharged water quality over several years.
{|class="wikitable"
{|class="wikitable"
|+ Soil Additives
|+ Soil Additives
|-  
|-  
!style="background: darkcyan; color: white"|Material
!Material
!style="background: darkcyan; color: white"|Benefits
!Benefits
!style="background: darkcyan; color: white"|Potential concerns
!Potential concerns
|-
|-
![[Biochar]]
![[Biochar]]
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[[category: materials]]
[[category: materials]]
[[category: Phosphorus]]
[[category: Water quality]]

Revision as of 13:40, 3 November 2017

A number of granular amendments have been demonstrated to improve nutrient removal from discharge water in BMPs such as bioretention systems, absorbent landscapes, sand filters or green roofs. There are two primary processes involved, chemical precipitation and adsorption. Both mechanisms are ultimately finite, but have been shown in come cases to make significant improvements on the discharged water quality over several years.

Soil Additives
Material Benefits Potential concerns
Biochar Renewable Currently expensive
Energy intensive to produce
Bold & GoldTM Documented Phosphorus removal upto 71%[1] Proprietary
Iron filings (ZVI) Proven phosphorus retention May harm plants[2]
PhoslockTM ? ?
Red sand Proven phosphorus retention ?
Smart SpongeTM
Sorbtive mediaTM Documented phosphorus retention Proprietary
Water treatment residuals Waste product reuse Quality control
  1. Hood A, Chopra M, Wanielista M. Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater. Water. 2013;5(1):53-66. doi:10.3390/w5010053.
  2. Logsdon SD, Sauer PA. Iron Filings Cement Engineered Soil Mix. Agron J. 2016;108(4):1753. doi:10.2134/agronj2015.0427.