Coal gasification slag is a solid waste that reacts with gasifier (air, oxygen or water vapor) at a certain temperature and pressure. The unburned and incompletely burned part of the coal is discharged as waste slag.Coal gasification slag itself, as a solid waste, causes dust to fly over a long period of time. At the same time, the slag contains a large amount of inorganic substances and heavy metals, which makes it impossible to recultivate the land where gasified slag has been stacked. However, it has a high porosity, which can better degrade and adsorb pollutants. This experiment uses coal gasification slag as a raw material in the coal gasification process, preparation of Ce-loaded coal gasification slag adsorbentThe adsorption performance of Congo Red by both was studied. The effects of adsorption time, pH, dosage of adsorbent and temperature on adsorption performance were also investigated.The results show that the best conditions for adsorption of raw coal gasification slag and Ce-loaded coal gasification slag are: pH=9, dosage of adsorbent is 0.5g, temperature is 50°C, reaction time is 150min, and concentration is 70mg/L. At this time, the adsorption capacity were 2.6392 mg/g and 7.152mg/g, and the removal rates were 30.65% and 95.87%, respectively. The adsorption behavior of Congo Red by raw coal gasification slag and Ce-loaded coal gasification slag is in accordance with the secondary adsorption kinetics, and conforms to the Langmuir adsorption isotherm, which is a monomolecular adsorption.

Xin Deng, Yidan Fan and Qingyun Zhang. Study on Adsorption Performance of Ce-Loaded Coal Gasification Slag to Congo Red. Academic Journal of Engineering and Technology Science (2019) Vol. 2 Issue 5: 18-28. https://doi.org/10.25236/AJETS.2019.020503.

[1] Rais Ahmad, Rajeev Kumar. Adsorptive removal of Congo red dye from aqueous solution using bael shell carbon [J]. Applied Surface Science, 257 (5): 1628-1633.
[2] A.Bhatnagar, A. K. Jain, M. K. Mukul. Removal of Congo red dye from water using carbon slurry waste [J]. Environmental Chemistry Letters, 2 (4): 199-202.
[3] Amran, Muhammad Bachri, Zulfikar, Muhammad Ali. Removal of Congo red dye by adsorption onto phyrophyllite [J]. International Journal of Environmental Studies, 67 (6): 911-921.
[4] Nimkar D A, Chavan S K. Removal of Congo red Dye from Aqueous Solution by Using Saw, Dust as an Adsorbent [J]. 2014, 4 (4).
[5] Hong Tham Nguyen Thi, Duy Chinh Nguyen, Thi Thuong Nguyen,等. Congo red Dye Removal Using Ca-Al Layered Double Hydroxide: Kinetics and Equilibrium [J]. Key Engineering Materials, 2019, 814: 463-468.
[6] Lunjian Chen, Congqiang Li, Bing Xu.Microbial degradation of organic pollutants in groundwater related to underground coal gasification [J]. Energy Science and Engineering, 2019.
[7] Yuying Du, Qifei Huang, Dahai Yan. Behavior of Mercury in a Multicomponent Slurry Gasifier: Effects of Waste Cogasification and Water Redox Condition [J]. Energy & Fuels, 2019, 33 (6).
[8] Duan, Wenjun, Yu, Qingbo, Xie, Huaqing. Thermodynamic analysis of hydrogen-rich gas generation from coal/steam gasification using blast? Furnace slag as heat carrier [J]. International Journal of Hydrogen Energy, 39 (22): 11611-11619.
[9] Qian Wang, Da Wang, Qiang Li. Relationship between Microstructure and Thermal Conductivity in Coal Slags with Variable Silica and Alumina [J]. Energy & Fuels, 2019, 33 (7).
[10] Yonghui Bai, Peng Lv, Xuhao Yang, et al. Gasification of coal char in H2O/CO2 atmospheres: Evolution of surface morphology and pore structure [J]. Fuel, 2018, 218: 236-246.
[11] Yan Gong, Guangsuo Yu, Qinghua Guo, et al. Progress on Opposed Multi-Burner (OMB) Coal-Water Slurry Gasification Technology and Its Industrial Applications [J]. Energy Procedia, 2017, 142: 1089-1094.
[12] Chenchen Lan, Qing Lyu, Yana Qie, et al. Thermodynamic and kinetic behaviors of coal gasification [J]. Thermochimica Acta, 2018, 666: 174-180.