文档介绍：The study of aqueous colloid in high
arsenic groundwater: insights in the Hetao
Basin by ultrafiltrating
ZHANG Bo, GUO Hua-ming*
School of Water Resources and Environment
China University of Geosciences (Beijing)
Beijing, China
Abstract—Long time uptake As from drinking high endemic diseases, investigations have been
As groundwater (>50 µg/L) has caused the intensively carried out to study the source,
residents in the Hetao basin of inner Mongolia transport and fate of As in aqueous systems.
suffering from endemic arsenicosis. Investigation of Mechanisms of As enrichment in groundwater
As geochemistry as impacted by colloids was are widely proposed to attribute to changes of
carried out by using ultrafiltration technology. redox condition in natural systems[3-6].
Results reveal anic and anic However, few investigations have been
colloid widely exists in the slightly alkaline and focused on effect of groundwater colloids on
reductive groundwater. anic colloids with As transportation and mobilization.
molecular weight > 10 kDa exist as dominant It is well known that the Fe/Mn-oxides
particles in groundwaters. The anic colloids affect As transportation in natural waters[7-8].
are mostly made up of Si, Al/Fe/Mn Due to plex and uncertain
-oxide/hydroxide as ponents. The ponents of the anic colloids,
slightly affect As(III) geochem