| 张艳平,张栋,刘兴元,赵红挺.铜绿假单胞菌吸附剂对水中菲-铜复合污染的吸附研究[J].农业环境科学学报,2019,38(2):422-429. |
| 铜绿假单胞菌吸附剂对水中菲-铜复合污染的吸附研究 |
| Biosorption of a combination of phenanthrene and copper pollutants from aqueous solutions by a Pseudomonas aeruginosa biosorbent |
| 投稿时间：2018-04-26 修订日期：2018-07-03 |
| DOI：10.11654/jaes.2018-0548 |
| 中文关键词: 菲 铜 复合污染 吸附 铜绿假单胞菌吸附剂 |
| 英文关键词: phenanthrene copper pollutant combination adsorption Pseudomonas aeruginosa biosorbent |
| 基金项目:国家自然科学基金项目（41271249，21407037）；浙江省自然科学基金项目（LQ14B070006）；广东省东莞市引进创新科研团队项目（2014607101003） |
|
| 摘要点击次数: 1687 |
| 全文下载次数: 1760 |
| 中文摘要: |
| 为研究铜绿假单胞菌（Pseudomonas aeruginosa）吸附剂对菲-铜复合污染的吸附性能，探讨菲、铜复合污染对吸附效果的影响。通过研究复合污染条件下菲、铜吸附系数的变化，复合体系中温度等对菲、铜去除的影响。研究发现复合体系可显著影响细菌吸附剂对菲、铜的吸附性能，吸附剂浓度为0.5 g·L-1，pH=5.0，温度为25℃条件下，吸附剂对菲的吸附量达1.15 mg·g-1，较单一体系提高了16.84%；对铜的吸附量为4.70 mg·g-1，较单一体系降低了5.50%。随着铜浓度的增加（0~5 mg·L-1），菲的吸附系数Kd从2.54 L·g-1增加到4.73 L·g-1；随着菲浓度的增加（0~1 mg·L-1），铜的吸附系数KL从4.89 L·mg-1增加到5.06 L·mg-1。复合体系中，吸附剂对菲和铜的吸附系数均随着温度的增加而减小。扫描电镜（SEM）结果显示，吸附剂吸附菲前后表面样貌没有发生显著变化；而吸附铜离子后，细菌表面呈现明显的凹凸。傅里叶变换红外光谱（FTIR）分析表明，铜离子的吸附与细菌细胞的叁键和累积双键官能团相关，进而影响了细菌吸附剂对复合污染的吸附。 |
| 英文摘要: |
| In this study, the adsorption behavior of coexisting phenanthrene and Cu2+ pollutants by a Pseudomonas aeruginosa biosorbent was investigated. It was found that the coexistence of phenanthrene and Cu2+ could significantly affect their removal by bacteria, suggesting a potential synergistic effect. Compared to the single pollutant system, the adsorption capacity of the bacteria (0.5 g·L-1, pH=5.0, and 25℃)for phenanthrene was found to be 1.15 mg·g-1 (16.84% higher), whereas the adsorption capacity for Cu2+ was 4.70 mg·g-1 (5.50% lower). As the Cu2+ concentration increased from 0 to 5 mg·L-1, the adsorption coefficient for phenanthrene (Kd)increased from 2.54 to 4.73 L·g-1; whereas, as the phenanthrene concentration increased from 0 to 1 mg·L-1, the adsorption coefficient of Cu2+ (KL)increased from 4.89 to 5.06 L·mg-1. In the co-contamination system, the adsorption coefficients of phenanthrene and Cu2+ were found to have negative linear relationships with temperature. Scanning electron microscopy (SEM)analysis showed that the surface morphology of the biosorbent changed only slightly after phenanthrene adsorption, but showed obvious concavity after Cu2+ adsorption. Fourier transform infrared spectroscopy (FTIR)analysis showed that Cu2+ adsorption was related to the triple bonds and the accumulated double bond functional groups of bacterial cells, thereby influencing the adsorption in the co-contamination system. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
