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Mineralization and adsorption mechanism of carbonate mineralizing bacteria on heavy metals in soil filtratein karst area
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Qian YANG1, Xiao-yi LI1, Jun-yi CAO1, Yun-feng PAN1, Cheng-zhong HE2, Chun-lin TU2, Long-hua WU3, Xin-ran LIANG1, *, Fang-dong ZHAN1, *
China Environmental Science | 2026, 46(1) : 29 - 40
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China Environmental Science | 2026, 46(1): 29-40
Mineralization and adsorption mechanism of carbonate mineralizing bacteria on heavy metals in soil filtratein karst area
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Qian YANG1, Xiao-yi LI1, Jun-yi CAO1, Yun-feng PAN1, Cheng-zhong HE2, Chun-lin TU2, Long-hua WU3, Xin-ran LIANG1, *, Fang-dong ZHAN1, *
Affiliations
  • 1.Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province, College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
  • 2.China Geological Survey Kunming General Survey of Natural Resources Center, Kunming 650111, China
  • 3.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, China
Published: 2026-01-20
Outline
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A carbonate-mineralizing bacterial strain C7-1was isolated from karst soil and identified as Serratia marcescens. Through single factor test combined with characterization technology, the cadmium (Cd) removal efficiency and underlyingmechanism of S. marcescens were analyzed, along with its ability toremove Cd, lead (Pb), zinc (Zn), and copper (Cu) from soil. The results indicated that the urea concentration was the main factor controlling Cd2+ removal.The maximum Cd2+ removal rate reached 74%, which was primarily via extracellular precipitation (42%) followed by surface adsorption (27%). Cd2+ may bind to CO32- to form CdCO3 based on scanning electron microscope-energy dispersive spectroscopy (SEM-EDS), fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The removal efficiencies of strain C7-1for Cd2+, Pb2+, Zn2+ and Cu2+ achieved 22.9%~65.9% in soil filtrates. The heavy metal ions were found to form amorphous mineral precipitates through co-precipitation and were adsorbed onthe bacterial surfaces via functional groups, including hydroxyl, carboxyl, carbonate, phosphoric acid, and sulfuric acid groups.

carbonate mineralized strain  /  karst area soil  /  heavy metals  /  biomineralization
杨茜, 李小艺, 曹俊毅, 潘云凤, 和成忠, 涂春霖, 吴龙华, 梁新然, 湛方栋. 碳酸盐矿化菌对喀斯特地区土壤滤液重金属的矿化吸附机制. 中国环境科学, 2026 , 46 (1) : 29 -40 .
Qian YANG, Xiao-yi LI, Jun-yi CAO, Yun-feng PAN, Cheng-zhong HE, Chun-lin TU, Long-hua WU, Xin-ran LIANG, Fang-dong ZHAN. Mineralization and adsorption mechanism of carbonate mineralizing bacteria on heavy metals in soil filtratein karst area[J]. China Environmental Science, 2026 , 46 (1) : 29 -40 .
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Year 2026 volume 46 Issue 1
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Article Info
  • Receive Date：2025-06-15
  • Online Date：2026-10-08
  • Published：2026-01-20
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History
  • Received：2025-06-15
Funding
Affiliations
    1.Key Laboratory for Improving Quality and Productivity of Arable Land of Yunnan Province, College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
    2.China Geological Survey Kunming General Survey of Natural Resources Center, Kunming 650111, China
    3.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, 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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