Dissolution of trace metals from particles of industrial origin and its influence on the composition of rainwater |
| |
| Institution: | 1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Tsinghua University, Beijing 100084, China;2. Kimoto Electric Co. Ltd, Funahashi-Cho, Tennouji-Ku, Osaka 543-0024, Japan;3. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Tsinghua University, Beijing 100084, China;2. Kimoto Electric Co. Ltd, Funahashi-Cho, Tennouji-Ku, Osaka 543-0024, Japan;1. College of Architecture and Environment, Sichuan University, Chengdu, 610065, China;2. Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Yibin, 644000, China;3. Chengdu Research Academy of Environmental Sciences, Chengdu, 610072, China |
| |
| Abstract: | The dissolution of trace metals (Fe, Mn, Cu, Zn, Ca and Mg) from pulverized fuel ash and steel dust particles in aqueous suspensions was studied as a function of solution pH and aerosol mass loading. The rate of dissolution, the final concentration and the fraction of the metal leached increased with decreasing pH over the range of pH 2.5→ 5. The leaching of aerosol particles is an important source of trace metals in rainwater, and the results of the leaching experiments were found to be consistent with the observations of these metals in urban rainwater. Alkaline materials such as Ca and Mg leached from particles may be important in the electroneutrality balance of rainwater and they could affect the solution pH. The dissolution of metals such as Fe and Mn may provide catalysts which could be important in the aqueous oxidation of SO2, and the leaching of Ca and Mg may have a ‘buffering’ effect in reacting cloud and aerosol droplets. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
