TY - JOUR
T1 - Effect of chemical constituents of oxytetracycline mycelia residue and dredged sediments on characteristics of ultra-lightweight ceramsite
AU - Qi, Yuanfeng
AU - Dai, Bibo
AU - He, Shengbing
AU - Wu, Suqing
AU - Huang, Jungchen
AU - Xi, Fei
AU - Ma, Yucheng
AU - Meng, Meng
N1 - Funding Information:
The study was supported by the Science and technology project of Zhejiang Province (No. 2015F50059); The National Natural Science Foundation of China (No. 51378306 and No. 51478262 ); Shanghai Jiaotong University ‘Chenxing Plan (SMC-B)’; Shandong provincial environmental protection industry projects for technology research and development (No. SDHBYF-2012-12).
Publisher Copyright:
© 2016 Taiwan Institute of Chemical Engineers.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - In order to solve disposal problems of hazardous solid wastes, oxytetracycline mycelia residue (OMR) and dredged heavy metal-contaminated sediments (DS) from Tai Lake were utilized as raw materials to produce ultra-lightweight ceramsite (ULC). Effects of mass ratios of organic matters/SiO2+Al2O3 (O/SA) and MgO+Fe2O3+CaO/SiO2+Al2O3 (MFC/SA) on characteristics of the ceramsite were investigated to optimize the ULC production process. Our results show that OMR and DS were suitable materials for ULC production, while the optimal mass ratios of O/SA and MFC/SA were 0.180-0.296 and 0.115-0.185, respectively. The addition of MFC lowered down the softening temperature and the viscosity of glass phase in ceramsite, promoting the crystallization in the glass phase. A proper MFC/SA ratio of 0.105-0.165 promoted the glass phase and increased the porosity of ceramsite. Al2O3 and SiO2 played a significant role in the formation process of crystals. However, the varying O/SA ratios only slightly impacted the variation of major crystalline phases and the viscosity of the glass phase. High MFC/SA ratios (≥0.205) decreased the crystallization of quartz, mullite and kyanite, but increased more complex crystalline phases. Additionally, the sintering process immobilized the heavy metals and could be a promising technology to control OMR pollution.
AB - In order to solve disposal problems of hazardous solid wastes, oxytetracycline mycelia residue (OMR) and dredged heavy metal-contaminated sediments (DS) from Tai Lake were utilized as raw materials to produce ultra-lightweight ceramsite (ULC). Effects of mass ratios of organic matters/SiO2+Al2O3 (O/SA) and MgO+Fe2O3+CaO/SiO2+Al2O3 (MFC/SA) on characteristics of the ceramsite were investigated to optimize the ULC production process. Our results show that OMR and DS were suitable materials for ULC production, while the optimal mass ratios of O/SA and MFC/SA were 0.180-0.296 and 0.115-0.185, respectively. The addition of MFC lowered down the softening temperature and the viscosity of glass phase in ceramsite, promoting the crystallization in the glass phase. A proper MFC/SA ratio of 0.105-0.165 promoted the glass phase and increased the porosity of ceramsite. Al2O3 and SiO2 played a significant role in the formation process of crystals. However, the varying O/SA ratios only slightly impacted the variation of major crystalline phases and the viscosity of the glass phase. High MFC/SA ratios (≥0.205) decreased the crystallization of quartz, mullite and kyanite, but increased more complex crystalline phases. Additionally, the sintering process immobilized the heavy metals and could be a promising technology to control OMR pollution.
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U2 - 10.1016/j.jtice.2016.05.005
DO - 10.1016/j.jtice.2016.05.005
M3 - Article
AN - SCOPUS:84969492121
VL - 65
SP - 225
EP - 232
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
SN - 1876-1070
ER -