Measurement of optical backscattering height scans from flocculated mineral sediments

作者：Maclver Michael R; Pawlik Marek^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2017, 514: 38-46.

DOI：10.1016/j.colsurfa.2016.11.030

• Aggregation
• Flocculation
• Optical backscattering
• Aggregate size
• Suspension

This paper describes the calculation and interpretation of optical backscattering (OBS) signal values for the measurement of aggregation state within settled particulate suspensions. An OBS height scan method is applied to suspensions of kaolin prepared at two different solid concentrations and flocculated by varying dosages of a non-ionic polyacrylamide. It was found that the root-mean-square scattering, F-rms, and mean scattering, F-mean, signal values correlate very well with changes in relative aggregation state as indicated by changes in the final sediment bed density and calculated index of aggregation values. Application of the measured signal value versus concentration data allows the calculation of the solid volume fraction versus height profile within the settled bed.

• 出版日期2017-2-5