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Adsorption performance and mechanisms of Cd(Ⅱ) from aqueous solution by polydopamine modificated coal ganguederived zeolite
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Yu-zhi ZHOU1, 2, Lin-li LONG1, Pian HU1, Jing-yu SUN1, Jing-wei NIU1, Min CHEN3, Wen-shuo WANG1, Xiao-yang CHEN1, 2, *
China Environmental Science | 2025, 45(7) : 3762 - 3770
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China Environmental Science | 2025, 45(7): 3762-3770
• Water Pollution Control •
Adsorption performance and mechanisms of Cd(Ⅱ) from aqueous solution by polydopamine modificated coal ganguederived zeolite
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Yu-zhi ZHOU1, 2, Lin-li LONG1, Pian HU1, Jing-yu SUN1, Jing-wei NIU1, Min CHEN3, Wen-shuo WANG1, Xiao-yang CHEN1, 2, *
Affiliations
  • 1.State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Anhui University of Science and Technology, Huainan 232001, China
  • 2.School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
  • 3.Taizhou Institute of Zhejiang University, Zhejiang University, Taizhou 318000, China
Published: 2025-07-20
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To solve the problems of high synthesis cost and lack of specific adsorption sites on traditional zeolites surface, polydopamine-modified coal gangue based zeolite was successfully synthesized by combining alkali melting hydrothermal method and impregnation coating method using coal gangue as raw material and dopamine as the polymerization monomer and applied for efficient adsorption of Cd(Ⅱ) from aqueous solution. The adsorption performance was investigated by batch adsorption experiments, and adsorption mechanism was revealed by SEM-EDS and XPS method. The results showed that polydopamine coating significantly improved the adsorption capacity of coal gangue-derived zeolite. The adsorption process conformed to the Langmuir adsorption isotherm model and pseudo-second-order model, suggesting that Cd(Ⅱ) adsorption by Zeolite@PDA was monolayer and chemical adsorption, and the theoretical maximum adsorption capacity could reach 130.89mg/g, which was two times as high as that of Zeolite (qmax=66.49mg/g). Thermodynamic studies indicated that Cd(Ⅱ) adsorption by Zeolite@PDA was a spontaneous, endothermic process with increased disorder at the solid-liquid interface. SEM-EDS and XPS analysis showed that cation exchange between Na+and Cd(Ⅱ) as well as surface complexation between surface functional groups and Cd(Ⅱ) played a primary role for Cd(Ⅱ) removal.

coal gangue  /  zeolite  /  Cd  /  adsorption performance  /  adsorption mechanisms
周育智, 龙林丽, 胡翩, 孙晶玉, 牛经纬, 陈敏, 王文硕, 陈孝杨. 聚多巴胺修饰矸石基沸石净化含镉污水性能与机制. 中国环境科学, 2025 , 45 (7) : 3762 -3770 .
Yu-zhi ZHOU, Lin-li LONG, Pian HU, Jing-yu SUN, Jing-wei NIU, Min CHEN, Wen-shuo WANG, Xiao-yang CHEN. Adsorption performance and mechanisms of Cd(Ⅱ) from aqueous solution by polydopamine modificated coal ganguederived zeolite[J]. China Environmental Science, 2025 , 45 (7) : 3762 -3770 .
Appendix
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Year 2025 volume 45 Issue 7
75
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Article Info
  • Receive Date：2024-11-27
  • Online Date：2026-10-08
  • Published：2025-07-20
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  • Received：2024-11-27
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Affiliations
    1.State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection, Anhui University of Science and Technology, Huainan 232001, China
    2.School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China
    3.Taizhou Institute of Zhejiang University, Zhejiang University, Taizhou 318000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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