A highly-effective composite sorbent that removes heavy metals from drinking water such as arsenic, antimony, chromium, cadmium and lead has been developed by the technology provider due rising demand for cost effective heavy metal removal from various water sources. These, along with waste products from various industrial productions, are some of the most frequently occurring contaminants in water. The patented technology represents a highly effective and inexpensive method of removal for such contaminants.
To create the composite sorbent, natural fibrous cellulose raw materials are carbonised and modified to contain hydrated iron oxides on the surface. The molecular structure of the resulting nanoporous carbon fibres facilitates a high rate of contaminant capture while reducing its resistance to water flow. This ensures high efficiency in removing contaminants while enabling the sorbent to remain independent of water pH.
In laboratory tests, residual concentrations of heavy metals have complied with the standard limits of drinking water. The physical properties of the nanoporous carbon fibres include:
• Length: 20 microns to several cm
• Diameter: 10 to 50 microns
• BET (Brunauer, Emmett and Teller) surface area: several m2/g to almost 2000 m2/g
Water contamination is a global problem. Besides treating drinking water, the sorbent can also be applied in the treatment of wastewater from chemical and electronic industries. Other practical uses include processes that require harmful input materials known to cause an ecological load on the environment if left untreated.
As billions of tons of the composite's raw materials are naturally produced each year, customers can benefit from low production costs. The composite sorbent is also up to 163% more effective than commercially available sorbents, with the following high removal efficiency rates: arsenic 97.8%, antimony 97.6%, chromium 96.4%, cadmium 88.9%, and lead at more than 98.9%.