Lipoic Acid Decorated Gold Nanoparticles and Their Application in the Detection of Lead Ions.

A simple colorimetric method has been developed for the detection of lead (Pb) in water samples using lipoic acid-functionalized gold nanoparticles. The lipoic acid-functionalized gold nanoparticles are induced to aggregate in the presence of the Pb which results in a change in the color of the functionalized gold nanoparticles. The change in color and the amount of Pb producing the change could be monitored via UV-visible spectrophotometry.

Increasing water productivity on Vertisols: implications for environmental sustainability.

Background: The availability and quality of irrigation water have become a serious concern because of global climate change and an increased competition for water by industry, domestic users and the environment. Therefore, exploring environmentally friendly water-saving irrigation strategies is essential for achieving food and environmental security. In northern Ethiopia, where traditional furrow irrigation is widely practiced, water mismanagement and its undesirable environmental impact are rampant.