Naturally occurring contamination of arsenic is of great concern in many Southeast Asian countries especially in Bangladesh. Because of the lack of understanding for the mechanism of As contamination, we have developed two studies through field surveys and laboratory experiments. First topic is focused on the underlying mechanisms controlling large spatial variation of As-contaminated groundwat...

Radioactive elements occur naturally in the environment. A long-term exposure to the radioactive gas radon (Rn) can lead to lung cancer. In Sweden, 450 cases of lung cancer, mostly among smokers, are registered every year, due to inhalation of radon gas. The ultimate parent element of Rn is uranium (U), which is found in soil and bedrock in varying concentrations. U is also radioactive but caus...

State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of S...

a Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China b Graduate University of Chinese Academy of Sciences, Beijing 100049, China c Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China d State Key Laboratory of Environmental Geochemistry, Institute of Geoc...

The foundations of stable isotope geochemistry were laid in 1947 by Urey’s classic paper on the thermodynamic properties of isotopic substances and by Nier’s development of the ratio mass spectrometer. Before discussing details of the naturally occurring variations in stable isotope ratios, it is useful to describe some generalities that are pertinent to the field of non-radiogenic isotope geoc...

Insights into seismic precursors have been obtained in the last decades. However, a detailed understanding of hydrogeochemical anomalies prior to earthquakes still remains aim many research teams worldwide. In order investigate earthquake-groundwater relationship, between 2018 and 2020, we performed sampling surveys coupled with continuous multiparametric monitoring Grassano spring fed by Mates...

Understanding groundwater geochemistry is crucial for water supply in arid regions. The present research was conducted the Mo river watershed on Tibetan plateau to gain insights into geochemical characteristics, governing processes and quality of endorheic watersheds. A total 28 samples were collected from phreatic confined aquifers hydrochemical analysis. results showed that slightly alkaline ...

Isotopic analysis can be performed on minerals, rocks, soil, tissue, gases, and liquids – just about anything. In view of the broad possibilities, we will only cover a few generalities here. In most instances, the element to be analyzed must be first isolated and purified before it can undergo isotopic analysis in a mass spectrometer. Purification is necessary to avoid isobaric interferences an...

Abstract Stratovolcanoes form conical mountains by ejecta and lava, while caldera volcanoes have depressions caused post collapse. Few studies investigated relationships between this morphology difference discharged fluid geochemistry. Here we present helium isotope ratios of geothermal fluids groundwater inside outside the Mt. Aso, Japan, compare these to in at Unzen, a stratovolcano same tect...