陈兰洲,赵瑞雪,武艳芳,邓松强,梁亚楠,刘思瑶.芽孢杆菌 Z- y3 对 Pb( II) 吸附特性及机理[J].中南民族大学学报自然科学版,2018,(1):30-34
芽孢杆菌 Z- y3 对 Pb( II) 吸附特性及机理
Characteristics and Mechanism of Pb(II) Adsorption in a Bacillus sp. Strain Z-y3
  
DOI:
中文关键词: 生物吸附  重金属 Pb(II)  吸附机理  芽孢杆菌
英文关键词: biosorption  Pb(II)  adsorption mechanism  Bacillus sp.
基金项目:国家自然科学基金资助项目(31370421);湖北省技术创新重大专项(2016ACA162)
作者单位
陈兰洲1,赵瑞雪1,武艳芳2,邓松强1,梁亚楠2,刘思瑶1 1 武汉大学 资源与环境科学学院湖北省环境修复技术研究中心武汉 430072
2 武汉文科生态环境有限公司武汉 430223 
摘要点击次数: 383
全文下载次数: 223
中文摘要:
      从重金属污染土壤中筛选出一株在酸性条件下对 Pb(II)有良好去除效果的芽孢杆菌 Bacillus sp. (Z-y3),研究了其去除机理.结果发现:在酸性条件下, 该菌能产碱, 去除效果受环境 pH 影响较小且吸附迅速. 通过 XRD、SEM-EDS、 FTIR、 XPS 等分析手段对该菌的吸附机理进行了研究,发现该菌株主要通过表面静电吸附、 离子交换、 产 碱沉淀等方式,利用胞外蛋白多聚物、 多糖的羟基和氨基结合重金属 Pb( II), 并形成难溶晶体达到吸附重金属 Pb(II)的效果. 该菌在较低酸性条件下对中低浓度的 Pb( II) 有高效的去除效果, 对铅污染土壤修复有一定的应用价值.
英文摘要:
      Bacillus sp. named as Z-y3,which was isolated from heavy metal contaminated soil, had high efficiency of lead removal capacity under acidic condition and its removal mechanism was studied. The results showed that this strain had good removal efficiency and was less affected by environmental pH condition. X-ray diffraction ( XRD), scanning electron microscope and energy dispersive spectrometer ( SEM-EDS), Fourier transform infrared ( FTIR) and X-ray photoelectron spectroscopy ( XPS ) were used to investigate the adsorption mechanism. It was found that the surface electrostatic adsorption, ion exchange, precipitation by producing alkali played a major role in removal of Pb ( II). Pb ( II) was adsorbed by means of the combination of extracellular polymeric substances, polysaccharide hydroxyl and amidogen with Pb (II) and forming insoluble crystal. The strain Z-y3 had higher removal efficiency for low and medium concentration of Pb (II) under wide acidity condition, and thus had a potential application value for the restoration of environmental Pb ( II) pollution.
查看全文   查看/发表评论  下载PDF阅读器
关闭