General Information
Material Properties
Particle Size – The average particle size for Thiol-SAMMS is approximately 40 microns.
SAMMS particle size distribution
Regeneration and Stripping
It is possible to strip the mercury from the Thiol-SAMMS using an acid after adsorption. The SAMMS can be reused and the mercury recovered.
Leachability and Disposal
The binding strength of thiol ligands with mercury is very strong and in most cases allows Thiol-SAMMS to pass TCLP requirements. However, users must perform a leachate test to verify that all local, state and federal laws and regulations for disposal are met.
Hydrophobicity and Hydrophilicity
SAMMS delivery systems can be adjusted to accommodate organic and aqueous fluids.
Shelf Life
Product performance is best maintained with storage in a low humidity state at temperatures below 7°F (2°C). Following recommended storage conditions should yield a shelf life of 12 months in unopened containers and 6 months in opened containers.
Isotherm Curve
The above figure shows a typical Thiol-SAMMS mercury adsorption capacity isotherm curve. Generally, the lower ending (equilibrium) concentration will have lower adsorbent capacity. Please note that Thiol-SAMMS adsorbent capacity may change with the conditions and the make-up of the customer waste streams.
TCLP
Thiol-SAMMS passes the TCLP requirement for mercury in applications tested to date by Steward. However, Steward understands some waste streams may contain species containing mercury that can physi-sorb to most any adsorbent being used and this could include the SAMMS material. The user must perform leachate tests and other tests as required to determine proper disposal recommendations for spent adsorbent. Steward Environmental Solutions, LLC recommends that Thiol-SAMMS not be disposed of in landfills unless they are certified to accept toxic materials. Customer must verify that all local, state and federal laws and regulations for disposal are met. Steward has no control over use by the customer; and in most instances, the customer may not have long term control over landfills to insure that conditions do not occur such as changes in pH, temperature, or exposure to other land-filled chemicals. Steward Environmental Solutions does not warrant methods of disposal. Disposal is the responsibility of the customer. California regulations classify any material having 20 mg/kg or more of mercury to be a hazardous waste. Spent SAMMS should not be disposed of in conditions where strongly acidic conditions are expected or at temperatures that will cause decomposition of Thiol-SAMMS.