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In situ mycoremediation of acid rain and heavy metals co-contaminated soil through microbial inoculation with Pleurotus ostreatus
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-12-04 , DOI: 10.1016/j.scitotenv.2023.169020 Ruqiang Dou 1 , Yanluo Xie 2 , Frank X Liu 3 , Biao Wang 4 , Fei Xu 5 , Kemeng Xiao 6
Science of the Total Environment ( IF 8.2 ) Pub Date : 2023-12-04 , DOI: 10.1016/j.scitotenv.2023.169020 Ruqiang Dou 1 , Yanluo Xie 2 , Frank X Liu 3 , Biao Wang 4 , Fei Xu 5 , Kemeng Xiao 6
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The combined pollution of acid rain and heavy metals in soil is a pressing environmental problem, especially in the regions with large-scale heavy industrial production activities. Low remediation efficiency and weak long-lasting stability are major challenges when disposing the heavy metals contaminated soil in acid rain polluted sites. Herein, a specific microbe, strain CT13 was isolated and domesticated to exhibit high tolerance to both acid rain and cadmium (Cd). Then, an in situ mycoremediation method by adopting a bioaugmentation technology of strain CT13 inoculation with Pleurotus ostreatus was developed. The remediation performance was investigated in acidic conditions with Cd concentrations in soil ranging from 0 to 15 mg/kg. While most of the bacteria strains (e.g. strain CT6/13) significantly improved the dry weight of mushroom and Cd accumulation in neutral environment, the performance of strain CT6 was remarkably deteriorated in acid rain environment. In contrast, strain CT13 maintained its behavior in acidic conditions, displaying ∼30 % and 150 % enhancements (vs the neutral environment) in the dry weight of mushroom and Cd accumulation, respectively. In addition, inoculation of strain CT13 led to significant reductions in the content of superoxide dismutase, peroxidase and lipid peroxidation in the fruiting body of P. ostreatus , indicating an improvement in the mushroom's tolerance to both acid rain and heavy metals. The synergistic effect of strain CT13 and P. ostreatus realized the significant improvement in soil remediation efficiency and long-lasting stability in acidic conditions, providing valuable insights into the remediation of heavy metal contaminated soil in the regions affected by acid rain.
中文翻译：
平菇微生物接种原位菌修复酸雨和重金属双重污染土壤
酸雨和土壤重金属的联合污染是一个紧迫的环境问题，特别是在有大规模重工业生产活动的地区。修复效率低、持久稳定性差是酸雨污染场地重金属污染土壤处置的主要挑战。在此，分离并驯化了一种特定的微生物菌株 CT13，该菌株对酸雨和镉 (Cd) 表现出高度耐受性。然后，开发了一种采用平菇CT13菌株接种生物强化技术的原位真菌修复方法。在土壤中镉浓度范围为 0 至 15 mg/kg 的酸性条件下研究了修复性能。虽然大多数菌株(如菌株CT6/13)在中性环境下显着提高了蘑菇的干重和Cd积累，但菌株CT6在酸雨环境中的性能显着恶化。相比之下，菌株 CT13 在酸性条件下保持其行为，蘑菇干重和镉积累量分别增加约 30% 和 150%（与中性环境相比）。此外，接种菌株CT13可使平菇子实体中超氧化物歧化酶、过氧化物酶和脂质过氧化酶含量显着降低，表明平菇对酸雨和重金属的耐受性均有所提高。菌株CT13与P. ostreatus的协同作用实现了土壤修复效率的显着提高和酸性条件下的长期稳定性，为酸雨影响地区重金属污染土壤的修复提供了有价值的见解。
更新日期：2023-12-04
中文翻译：
平菇微生物接种原位菌修复酸雨和重金属双重污染土壤
酸雨和土壤重金属的联合污染是一个紧迫的环境问题，特别是在有大规模重工业生产活动的地区。修复效率低、持久稳定性差是酸雨污染场地重金属污染土壤处置的主要挑战。在此，分离并驯化了一种特定的微生物菌株 CT13，该菌株对酸雨和镉 (Cd) 表现出高度耐受性。然后，开发了一种采用平菇CT13菌株接种生物强化技术的原位真菌修复方法。在土壤中镉浓度范围为 0 至 15 mg/kg 的酸性条件下研究了修复性能。虽然大多数菌株(如菌株CT6/13)在中性环境下显着提高了蘑菇的干重和Cd积累，但菌株CT6在酸雨环境中的性能显着恶化。相比之下，菌株 CT13 在酸性条件下保持其行为，蘑菇干重和镉积累量分别增加约 30% 和 150%（与中性环境相比）。此外，接种菌株CT13可使平菇子实体中超氧化物歧化酶、过氧化物酶和脂质过氧化酶含量显着降低，表明平菇对酸雨和重金属的耐受性均有所提高。菌株CT13与P. ostreatus的协同作用实现了土壤修复效率的显着提高和酸性条件下的长期稳定性，为酸雨影响地区重金属污染土壤的修复提供了有价值的见解。
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