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Removal and Recovery of Phosphate, Selenium, and Arsenic from Water, w/ Potential Reuse as Fertilizers

Technology Benefits

 Encapsulation of reactive nZVI particles ensures better contact with contaminants andhigher efficiency of reaction and retention of the contaminants. Calcium alginate beads enable opportunities for co-encapsulation of microbes, enzymes,and/or other active ingredients Studies involving phosphorous have shown phosphate recovery of 80% or higher wereachieved within 30 minutes of treatment Formulations suitable for standing, slow-moving, or rapidly moving water Beads can be placed in porous containers and suspended from the surface so they stay inthe zone of highest phosphorus concentration Readily manufactured at commercial scale using standard processes May be applied across a range of locations and applications

Technology Application

 Treatment of eutrophic water bodies Industry effluent, acid mine drainage, contaminated groundwater, wastewater treatmentand treatment of feedlot ponds and runoff

Detailed Technology Description

None

*Abstract

Scientists at NDSU have developed a technology that removes selenium, arsenic, trichloroethylene and phosphorus from water using beads containing reactive nano zero valent iron (nZVI) particles encapsulated in calcium alginate beads. When charged with phosphorus or selenium, these beads can be beneficially reused to provide phosphate and/or micronutrient fertilization. Therefore, the technology provides dual benefits of cleaning eutrophic and contaminated water bodies and waste streams, while collecting some of the contaminants (selenium and phosphate) with the potential of reuse in a form that facilitates this reuse.

*Principal Investigator

Name: Achintya Bezburuah

Department:

Country/Region

USA