'SioTeX has been running a simple solubility test of our biogenic
amorphous silica in water for about 4 months. The dosing is 1/4 tsp
RecycleSil/gal of water. To date, it appears that the RecycleSil
material has remained mostly in solution. In the future, we have plans
to run our product through standardized solubility tests such as OECD
Test 105 Water Solubility. We will also explore the appropriate dosing
for hydroponic and aquaponic uses as well.
Further, it is evident that amorphous silica has a finite solubility in water as detailed in this journal article (https://pubs.acs.org/doi/pdf/10.1021/j150516a002).
Temperature changes will impact solubility. Other factors like
impurities and pH changes in the water may also increase/decrease
solubility. These factors will need to be taken into consideration when
discussing solubility of amorphous silica in water and in nutrient
How a nearly pure SiO2 material can be soluble. Can you elucidate that a bit more?
Though we haven't explicitly explored the behavior of RecycleSil in
water, existing journal articles discuss the finite solubility of
amorphous silica (similar to the RecycleSil) in water.
Dosing approximations in the current literature refer to the use of
silica in growing rice, sugar, and wheat. Please note, the silica
sources used (traditional ones like blast furnace slag residues,
potassium silicates, or magnesium silicates) aren't like our biogenic
RecycleSil material, so the plant-usable silicon will differ.
In general, these papers noted dosing ranges from 50-1000kg/hectacre
(ha). 1ha is about 11959 sq yd; and 1kg is about 2.2lbs. Starting with
the middle (500kg/ha) and ranging up translates to a RecycleSil dosing
of around 0.1-0.2 lbs/sq yd. Again, please note this is only an
approximation based on experiments performed on plants that are not of
the cannabis variety.
SioTeX's RecycleSil amorphous silica is derived
directly from rice hulls (a crop residue), secured from the growing
regions in East Texas that would otherwise be landfilled or burned.
These hulls naturally take up silica from the soil and water.
Our production process conditions the hulls so that we can drive off
the organics and recover the biogenic amorphous silica. Any additional
chemical entities found in our biogenic silica are trace minerals that
are characteristic to the Texas soils and that have been taken up by the
rice paddy while growing. Our product is 99.9+% silica, so the trace
minerals should be just that, a trace.
No part of our biogenic amorphous silica manufacturing process
utilizes potassium silicate (PS) or any of PS's raw materials, which are
produced through synthetic routes.
The majority of our characterization for the RecycleSil product has been
for non-liquid fertilizer materials against test methods such as JAOAC,
Vol. #96, #2, 2013. We are planning on extending the characterization
to liquid systems in the future, but at this time we don't have specific
data compatibility with the systems and blends. If its beneficial, we
can send you a sample of our product for you to evaluate in the your
systems/applications. We'd be grateful if you would share some of your
results as well.