Natural organic matter influences arsenic release into groundwater (image) American Chemical Society Share Print E-Mail Caption A sediment core sample from an aquifer in Vietnam shows orange, arsenic-bearing iron oxides and black NOM. Credit Andreas Kappler Usage Restrictions Image may only be used with appropriate credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.