The role of sulfur in arsenic contamination of groundwater
Groundwater is an essential resource for humans and society, providing drinking water, irrigation and other services. Unfortunately, it may also contain contaminants such as arsenic. Arsenic mobilisation and mobility in groundwater can have a significant impact on human health and the environment. Low-arsenic, high-iron aquifers are often considered contamination-free and a feasible exploitation option. Nghiem and colleagues show that limited sulfate reduction can accelerate groundwater arsenic contamination, even in high-iron aquifers. The image on the cover shows pumping groundwater used to irrigate one typical paddy soil farmland in Bangladesh, which is where the data by Nghiem and colleagues were collected.
See Nghiem et al. and News & Views by Planer-Friedrich