Wu Xingxing, Yu Binbin, Xu Wei, Fan Zheng, Wu Zucheng, Zhang Huimin
a MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Department of Environmental Engineering, Laboratory of Electrochemistry and Energy Storage, State Key laboratory of Clean Energy Utilization , Zhejiang University , Hangzhou , People's Republic of China.
b Environmental Monitoring Center of Taizhou , Taizhou, Zhejiang , People's Republic of China.
Environ Technol. 2017 Aug;38(16):1997-2002. doi: 10.1080/09593330.2016.1244566. Epub 2016 Oct 21.
As the main greenhouse gas, CO is considered as a threat in the context of global warming. Many available technologies to reduce CO emission was about CO separation from coal combustion and geological sequestration. However, how to deal with the cost-effective storage of CO has become a new challenge. Moreover, chromium pollution, the treatment of which requires huge energy consumption, has attracted people's widespread attention. This study is aimed to develop the sequestration of CO via chromium slag. A dynamic leaching experiment of chromium slag was designed to testify the ability of CO adsorption onto chromium slag and to release Cr(VI) for stabilization. The results showed that the accumulative amounts of Cr(VI) were ca. 2.6 mg/g released from the chromium slag after 24 h of leaching. In addition, ca. 89 mg/g CO was adsorbed by using pure CO in the experiment at 12 h. Calcite is the only carbonate species in the post-carbonated slag analyzed by powder X-ray diffraction and thermal analysis. The approach provides the feasibility of the utilization of chromium slag and sequestration of the carbon dioxide at the same time at ordinary temperatures and pressures.
作为主要的温室气体，一氧化碳在全球变暖的背景下被视为一种威胁。许多现有的减少一氧化碳排放的技术都与从煤炭燃烧中分离一氧化碳以及地质封存有关。然而，如何经济高效地储存一氧化碳已成为一项新挑战。此外，铬污染的处理需要巨大的能源消耗，这已引起人们的广泛关注。本研究旨在通过铬渣实现一氧化碳的封存。设计了铬渣的动态浸出实验，以验证铬渣对一氧化碳的吸附能力以及释放六价铬以实现稳定化的能力。结果表明，浸出24小时后，铬渣中六价铬的累积释放量约为2.6毫克/克。此外，在实验中，12小时时使用纯一氧化碳吸附的一氧化碳量约为89毫克/克。通过粉末X射线衍射和热分析，方解石是碳酸化后炉渣中唯一的碳酸盐物种。该方法为在常温常压下同时利用铬渣和封存二氧化碳提供了可行性。
