Fate and transport of chromium in industrial sites: Dynamic simulation on soil profile.

Direct discharge of chromium-containing waste water and improper disposal of waste residues in industrial sites may lead to the vertical migration of metals into aquifers, posing serious threat to soil-groundwater system. The heterogeneity in soil profile further aggravates the complexity and unpredictability of this transport process. However, topsoil was the main focus of most studies.

Effect of overlying water pH, temperature, and hydraulic disturbance on heavy metal and nutrient release from drinking water reservoir sediments.

How environmental factors impact the release of pollutants from sediment is critical to ensure the safety of drinking water, especially when the seasons change. Here, we investigated the effect of water pH, temperature, and hydraulic disturbance on the release of heavy metals and nutrients from the sediment of drinking water reservoir. The results show that lower initial water pH promoted the Zn release, while low temperature enhanced the Mn flux after 15 days.

Release of odorants from sediments of the largest drinking water reservoir in Shanghai: Influence of pH, temperature, and hydraulic disturbance.

Endogenous pollution from sediments is gradually becoming a critical pollution source of the drinking water reservoir. Odorants can be released from sediments into the overlying water which further deteriorate the water quality of the drinking water reservoir. In this work, we set the sediment-overlying water systems under various water pH (6.

AMnO (A=Cu, Ni and Zn) sorbents coupling high adsorption and regeneration performance for elemental mercury removal from syngas.

AMnO (A= Cu, Ni and Zn) spinel sorbents synthesized by a low-temperature sol-gel auto-combustion method were for the first time used to eliminate elemental mercury (Hg) from syngas. CuMnO sorbent exhibits the highest Hg adsorption performance under simulated syngas, higher than 95 % Hg capture efficiency is obtained at 200 °C. Adsorption-regeneration experiments demonstrate that the regenerability of CuMnO is excellent.

Insights into the catalytic behavior of LaMnO perovskite for Hg oxidation by HCl.

LaMnO-based catalysts with perovskite structure have gained increasing interest for Hg oxidation owing to their excellent catalytic activity, high thermal stability and unique redox behavior. Understanding the Hg oxidation behavior on LaMnO will broaden the application of LaMnO-based perovskites in Hg removal field. Density functional theory (DFT) calculations were conducted to examine the catalytic mechanism of Hg oxidation by HCl on LaMnO surface.