Remediation of Pb-contaminated port sediment by biosurfactant from Bacillus sp.G1  

Bacillus sp.G1产生物表面活性剂对含铅港口底泥的修复（英文）

作　　者：Yi-ming GUO Yun-guo LIU Hua LI Ai-bing ZHENG Xiao-fei TAN Ming-ming ZHANG 郭一明;刘云国;李华;郑爱兵;谭小飞;张明明(上海海事大学经济管理学院,上海201306;湖南大学环境科学与工程学院,长沙410082;湖南大学环境生物与控制教育部重点实验室,长沙410082)

机构地区：[1]School of Economics and Management, Shanghai Maritime University, Shanghai 201306, China [2]College of Environmental Science and Engineering, Hunan University, Changsha 410082, China [3]Key Laboratory of Environmental Biology and Pollution Control,Ministry of Education, Hunan University, Changsha 410082, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第6期1385-1393,共9页中国有色金属学报（英文版）

基　　金：Project(2016M590348) supported by China Postdoctoral Science Foundation;Projects(41301154,41271332) supported by the National Natural Science Foundation of China

摘　　要：The remediation of Pb-contaminated port sediment by biosurfactant from a new isolated Bacillus sp.G1was studied.ThePb removal efficiencies were investigated under multi-levels of water-solid ratio,pH and ionic strength.Result showed thatexchangeable speciation of Pb could be removed by maximum removal capacity of76.8mg/g after leaching.The Langmuir isothermreflected the adsorption process best to fit the experimental adsorption equilibrium data.Fourier transform infrared spectra(FTIR)indicated that C=O and-CH3may be the functional groups.Scanning electron microscopy(SEM)analysis showed that thesurface of the port sediment became much smoother after adsorption interaction,which reflected that the complexation between Pbions and biosurfactant was more stable.The results indicated that the biosurfactant of Bacillus sp.G1could remove Pb effectivelyfrom the Pb-contaminated port sediment(PCPS)and suggested a novel method for PCPS remediation.研究了一株新分离的Bacillus sp.G1所产生物表面活性剂对含铅港口底泥的修复,及在不同固水比、pH、离子强度等条件下对铅的去除效果。结果显示:可交换态铅淋滤后最大吸附去除量可达76.8 mg/g;Langmuir等温吸附模型可以更好地反映该生物表面活性剂对Pb的吸附特性;傅立叶变换红外吸收光谱仪分析显示C=O及—CH_3可能是有效功能基团;扫描电镜观察发现沉积物样品表面结构在活性剂处理前后由粗糙变光滑,反映了铅离子与表面活性剂间的络合更稳定。研究表明,菌株Bacillus sp.G1所产表面活性剂对铅有较好的去除效果,为含铅港口底泥修复提供了新的思路。

关 键 词：plumbum SEDIMENT SURFACTANT REMEDIATION 

分 类 号：TQ423[化学工程] X736.1[环境科学与工程—环境工程]