S R Farrah

Characteristics of humic acid and organic compounds concentrated from tapwater using the aquella virus concentrator

Abstract Humic acid and other organic compounds present in eluates from filters used to process large volumes of treated tapwater using the Aquella virus concentrator were found to share certain properties. Both humic acid and the other organic compounds in the filter eluates adsorbed to membrane filters at low pH, were eluted from membrane filters at high pH, interfered with virus adsorption to membrane filters, formed flocs at low pH, and were removed by anion-exchange resins.

A simple method for concentration of enteroviruses and rotaviruses from cell culture harvests using membrane filters

Organic compounds in cell culture harvests known as membrane-coating components (MCC) prevent virus adsorption to membrane filters. Blending cell culture harvests with fluorocarbon removed the MCC and permitted adsorption of virus in acidified harvests to epoxy-fiberglass filters. Subsequent elution with high pH buffer resulted in recovery of greater than 90% of the virus with concentrations of up to 100-fold.

Concentration of humic acid from tapwater

Abstract Membrane filter procedures previously used for concentration of virus from tapwater were modified to concentrate humic acid. These procedures were capable of recovering approximately 50% of added humic acid from tapwater. Thirty milligrams of naturally occurring humic acid was detected in 1000-1. samples of tapwater.