N3.07 Brown 2017 ReNUWIt Annual Meeting Poster

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Abstract/Contents

Abstract: To address the issue of excessive riparian phosphate pollution, lattices of calcium alginate filaments infused with Magnesium-Aluminum Layered Double Hydroxides (MgAl-LDH) were constructed. The MgAl-LDH combined with the calcium alginate adheres to the dissolved phosphates in water, preventing uptake by algae and further environmental destruction. Kinetics and equilibrium experiments revealed a maximum absorption capacity of 127.5 mg P/gram of scaffold. Furthermore, the interlocking design of the scaffold removed phosphorus more effectively than previous bead designs, due to the increased surface area to volume ratio. It is inexpensive - only $0.04/gram - and could be deployed in stormwater detention ponds, catch basins, or even fish hatchery outflows. Post-saturation, they could be potentially recycled into slow-release fertilizer capsules, hindering the cycle of phosphate runoff pollution and offsetting the demand for mined phosphate. With modification using alternate LDH compositions, they could additionally remove nitrates, heavy metals and bacteria, potentially targeting an expanded suite of pollutants.

Type of resource	other
Date created	May 2017

Subject	Re-inventing the Nation’s Urban Water Infrastructure
Subject	ReNUWIt
Subject	N3.07
Subject	Natural Water Infrastructure Systems
Subject	Distributed stormwater treatment unit processes
Subject	California

Location	https://purl.stanford.edu/ws452st6096

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License: This work is licensed under an Open Data Commons Attribution License v1.0.

Preferred Citation: Brown, P., Wolfand, J. M., & Luthy, R. G. (2017). N3.07 Brown 2017 ReNUWIt Annual Meeting Poster. Stanford Digital Repository. Available at: https://purl.stanford.edu/ws452st6096

Re-inventing the Nation's Urban Water Infrastructure (ReNUWIt)

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