One of characteristics of Cr2O3-containing refractory is excellent corrosion resistance. However, there is a problem of hexavalent chromium, which is noxious to the human body, and easily formed by the reactions among...One of characteristics of Cr2O3-containing refractory is excellent corrosion resistance. However, there is a problem of hexavalent chromium, which is noxious to the human body, and easily formed by the reactions among the refractory and CaO, Na2O and/or K2O in slag. In this article, the reason why the Cr2O3-containing refractory has excellent corrosion resistance, the forming conditions of hexavalent compounds, and the methods for suppressing generation of the compound, are described as a base of further development of excellent refractories.展开更多
Leather making is the process of converting raw hides into leather.Amounts of solid waste containing hazardous and high value components are generated during this process.Therefore,the elimination of the potential pol...Leather making is the process of converting raw hides into leather.Amounts of solid waste containing hazardous and high value components are generated during this process.Therefore,the elimination of the potential pollution and resource utilization of leather solid waste are the primary research hotspots.Herein,we comprehensively review the recent advances in the resource utilization of leather solid waste generated from chrome tanning including the utilization of tannery hair waste,untanned solid waste,chrome-containing leather solid waste,tannery sludge and finished leather waste,emphasizing on the general and novel utilization approaches.Finally,the remaining challenges and perspectives were summarized,in order to accelerate the development of resource utilization of leather solid waste.展开更多
文摘One of characteristics of Cr2O3-containing refractory is excellent corrosion resistance. However, there is a problem of hexavalent chromium, which is noxious to the human body, and easily formed by the reactions among the refractory and CaO, Na2O and/or K2O in slag. In this article, the reason why the Cr2O3-containing refractory has excellent corrosion resistance, the forming conditions of hexavalent compounds, and the methods for suppressing generation of the compound, are described as a base of further development of excellent refractories.
基金National Key Research and Development Program of China(No.2017YFB0308402)Shandong Provincial Key Research&Development Project(No.2018GGX108006).
文摘Leather making is the process of converting raw hides into leather.Amounts of solid waste containing hazardous and high value components are generated during this process.Therefore,the elimination of the potential pollution and resource utilization of leather solid waste are the primary research hotspots.Herein,we comprehensively review the recent advances in the resource utilization of leather solid waste generated from chrome tanning including the utilization of tannery hair waste,untanned solid waste,chrome-containing leather solid waste,tannery sludge and finished leather waste,emphasizing on the general and novel utilization approaches.Finally,the remaining challenges and perspectives were summarized,in order to accelerate the development of resource utilization of leather solid waste.
