Heavy Metal Precipitation

REMOTOX® is a calcium polysulfide based liquid consisting of multiple sulfur compounds that strongly bond to heavy metals in water. The metal sulfides formed have a very low solubility and persist as stable solids, which allows for a more environmentally sound disposal.

Application advantages:

  • High reactivity with heavy metal ions and extremely low solubility of resulting metal sulfides over a wide pH range.
  • Can break and precipitate chelated metals without pretreatment.
  • Removes chromates and dichromates without preliminary reduction of the chromium to its trivalent state.
  • Better settling and dewatering aspects of the metal precipitate.
  • Dissolved calcium ions form a coagulant/flocculant aid.
  • REMOTOX can be adapted to enhance any existing system.
  • Converts waste cyanides into the relatively non-toxic thiocyanate ion.

Product features:

  • Its residues are inert and non-toxic.
  • REMOTOX is relatively inexpensive.
  • It is not DOT regulated.
  • Unlike dithiocarbamate or its related salts, it does not contain or release carbon disulfide.
  • REMOTOX ions provide more stability in acidic medium as compared to other sulfides. It also presents a lower H2S exposure potential and it is noticeably less malodorous.

For general application and dosage guidelines, samples or pricing information, please email us at or call us at 623-328-5175.

*Quick Links to Case Studies:

Removal of Heavy Metals from Wastewater by Calcium Polysulfide
Continuous Removal of Heavy Metals by the Calcium Polysulfide Process
Removing Heavy Metals, Phosphate and COD Substances by Calcium Polysulfide
Process for Separating Heavy Metals from Wastewater by Calcium Polysulfide
Source Reduction Technology Report in Circuit Board Manufacture (see page 26)
Chromium Removal from Ion-Exchange Waste Brines with Calcium Polysulfide
Precipitation of Heavy Metals from Wastewater by Calcium Polysulfide

*Links to third-party sites ("Hyperlinks") do not constitute an endorsement by Graus Chemicals and Graus Chemicals is not responsible for the availability of these sites or their contents.