16 17 The global warming of Earth's near-surface, air and oceans in recent decades is a direct 18 consequence of anthropogenic emission of greenhouse gases into the atmosphere such as CO2, 19 CH4, N2O and CFCs. The CO2 emissions contribute approximately 60% to this climate change. 20 This study investigates experimentally the aqueous carbonation mechanisms of an alkaline paper 21 mill waste con...

To assist in the design of enhanced reductive dechlorination systems for in situ remediation of chlorinated solvent source zones, the software BUCHLORAC (BUffering of deCHLORination ACidity) was developed to predict the amount of buffer required to maintain the groundwater pH in a DNAPL treatment zone within the optimal range for dechlorinating bacteria. Reductive dechlorination is an acidformi...

Based on analysis of groundwater hydrochemical and isotopic indicators, this article aims to identify the groundwater flow systems in the Yangwu River alluvial fan, in the Xinzhou Basin, China. Groundwater delta(2)H and delta(18)O values indicate that the origin of groundwater is mainly from precipitation, with local evaporative influence. d-excess values lower than 10% in most groundwaters sug...

The precipitation of strontium in highly concentrated nitric acid is often used standard radiochemical methods for 90Sr separation. In this work, the description Sr behavior such conditions was studied point speciation simulation. Standard method based on Phreeqc software considered but two problems underlined limits approach to study process: inappropriate ionic strength correction model (for ...

Abstract Deep groundwater monitoring in tight bedrock is not commonly performed and rarely documented. For a case study Bochum, NRW, deep wells allow investigation the outcropping Carboniferous down to depth of 186 m. Groundwater was carried out by combining sampling local springs at site. Inverse models were developed using hydrogeochemical code PHREEQC understand natural geochemical processes...

In recent years, geothermal energy use from low-temperature sandstone reservoirs has sharply increased. Nonetheless, the injection of heat-depleted fluids not been an easy task because well/formation damage and operational/economic issues. Sønderborg plant is a case example heat-mining reservoir. It in northeast towards Augustenborg Fjord. The present work takes into consideration regional loca...

Chemical precipitation to form magnesium ammonium phosphate (MAP) is an effective technology for recovering ammonium nitrogen (NH4(+)-N). In the present research, we investigated the thermodynamic modeling of the PHREEQC program for NH4(+)-N recovery to evaluate the effect of reaction factors on MAP precipitation. The case study of NH4(+)-N recovery from coking wastewater was conducted to provi...

19 To assist in the design of enhanced reductive dechlorination systems for in situ remedia-20 tion of chlorinated solvent source zones, the software BUCHLORAC (BUffering of 21 deCHLORination ACidity) was developed to predict the amount of buffer required to 22 maintain the groundwater pH in a DNAPL treatment zone within the optimal range for 23 dechlorinating bacteria. Reductive dechlorination...

Utilizing coral aggregate concrete (CAC) for construction on remote islands can significantly reduce cost and period, CO 2 emission, consumption of non-renewable energy. The durability reinforced CAC structures is critically influenced by their resistance to chloride attack. In this study, a reactive transport modelling was developed investigate ingress in CAC, which COMSOL-PHREEQC interface ba...

Quantification and scientific observations of the fate transport dissolved strontium in water systems, particularly cold climate are severely lacking. In this work, an experiment conducted at a temperature 6 °C, observation precipitation along with calcium carbonate minerals from wastewater is investigated. ICP-MS used for metal analyses where distribution species saturation state surface compl...