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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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含盐量对石油污染土壤生物修复的影响
DOI: 10.3969/j.issn.1000-2006.2013.02.019, PP. 108-112
Keywords: 石油污染土壤,生物修复,土壤含盐量,生物刺激,生物强化
Abstract:
模拟野外漫灌洗盐并控制洗盐次数得到不同含盐量的土壤,比较单纯生物刺激、生物刺激加生物强化处理对不同含盐量的石油污染土壤的修复效果。结果表明:无论是单纯的生物刺激,还是生物刺激加生物强化处理下,土壤含盐量均有一定程度的降低,可有效提高石油烃的降解率。当土壤含盐量为0.22%(质量分数)时,添加4%菌剂修复第3天时,石油烃降解率可达24.98%;当土壤含盐量为0.01%时,生物刺激加生物强化处理28d后石油烃的降解率是单纯生物强化的1.1倍;低含盐量添加4%菌剂处理下土壤石油烃降解率是高含盐量加4%菌剂处理的1.22倍。各处理下土壤脱氢酶活性随着培养时间逐渐增强,ph则随着培养时间有所下降,土壤盐碱性得到改良;土壤环境得到改善,微生物的种类及数量增加。
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