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Migration patterns of Fe2+ and Mn2+ in coal mine water under freezing conditions and their phytotoxicity
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Yue WANG1, Rong-yu DUAN2, Nan SANG1, 2, Guang-ke LI2, *
China Environmental Science | 2026, 46(3) : 1376 - 1386
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China Environmental Science | 2026, 46(3): 1376-1386
• Water Pollution Control •
Migration patterns of Fe2+ and Mn2+ in coal mine water under freezing conditions and their phytotoxicity
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Yue WANG1, Rong-yu DUAN2, Nan SANG1, 2, Guang-ke LI2, *
Affiliations
  • 1.Department of Resources and Environmental Engineering, Shanxi Institute of Energy, Taiyuan 030604, China
  • 2.School of Environment and Resources, Shanxi University, Taiyuan 030031, China
Published: 2026-03-20
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Acidic mine drainage (AMD) containing high concentrations of heavy metal ions such as Fe2+ and Mn2+ was treated by a freezing method utilizing the purification effect of ice crystals. The process parameters for removing Fe2+ and Mn2+ from simulated AMD via the freezing method were optimized through single-factor and orthogonal experiments, and the optimal conditions were determined (for Fe2+: freezing temperature of -12℃, initial concentration of 0.9mg/L, freezing radius of 4.25cm; for Mn2+: freezing temperature of -6℃, initial concentration of 1.2mg/L, freezing radius of 5.00cm). The optimized process was then applied to treat actual AMD. The results showed that the removal rates of Fe2+ and Mn2+ from the actual AMD reached 60% and 59%, respectively, which confirmed the effectiveness of the technology. Furthermore, barley seeds and seedlings were used as model plants to evaluate the phytotoxicity of the AMD before and after treatment. The results indicated that, compared with the untreated AMD, the treated AMD did not inhibit the germination of barley seeds or the growth of barley seedlings. This study confirmed that the freezing method can not only effectively remove heavy metal pollutants from AMD but also significantly reduce its biotoxicity.

iron ions  /  manganese ions  /  acidic coal mine water  /  phytotoxicity
王悦, 段蓉宇, 桑楠, 李广科. 煤矿矿井水中Fe2+、Mn2+在冷冻条件下的迁移规律及植物毒性. 中国环境科学, 2026 , 46 (3) : 1376 -1386 .
Yue WANG, Rong-yu DUAN, Nan SANG, Guang-ke LI. Migration patterns of Fe2+ and Mn2+ in coal mine water under freezing conditions and their phytotoxicity[J]. China Environmental Science, 2026 , 46 (3) : 1376 -1386 .
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Year 2026 volume 46 Issue 3
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  • Receive Date：2025-08-05
  • Online Date：2026-10-08
  • Published：2026-03-20
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  • Received：2025-08-05
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Affiliations
    1.Department of Resources and Environmental Engineering, Shanxi Institute of Energy, Taiyuan 030604, China
    2.School of Environment and Resources, Shanxi University, Taiyuan 030031, 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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