The purpose of this review is to better understand the full life cycle and influence of ammonia
from an aquatic biology perspective. While ammonia has toxic properties in water and air, it …

This work reviews applications of stable isotope analysis to the studies of transport and
transformation of N species in groundwater under agricultural areas. It summarizes evidence …

Intensive agriculture and urbanization have led to the excessive and repeated input of
nitrogen (N) into soil and further increased the amount of nitrate (NO 3−) leaching into …

Nutrient pollution is a primary driver of eutrophication and harmful algal blooms (HABs) in
estuaries and coastal waters worldwide. In 2011–2012, 20 sites evenly distributed …

Nitrate (NO3−) concentrations in public water supplies have risen above acceptable levels
in many areas of the world, largely as a result of overuse of fertilizers and contamination by …

Natural abundance nitrogen and oxygen isotopes of nitrate (δ15NNO3 and δ18ONO3)
provide an important tool for evaluating sources and transformations of natural and …

Growing evidence that certain poly-and perfluoroalkyl substances (PFASs) are associated
with negative human health effects prompted the US Environmental Protection Agency to …

Wastewater impoundments at concentrated animal feeding operations (CAFOs) represent a
potential source of veterinary pharmaceuticals and steroid hormone contamination to …

Sources and co-cycling of nitrogen species in arsenic-prone groundwater remain poorly
understood, which could affect arsenic behavior. Here, geochemical and multi-isotopic …

High nitrogen loading in aquifers is an important issue because of its harmful effects on
human health; its origins are often complicated, especially in urbanized areas. This study …