抗性真菌对Pb²⁺、Zn²⁺和Cu²⁺的吸附特性研究     

姚颋  江丹丹 《西部资源》2012,(1):62-64

从铜陵市某矿区土壤中筛选出1株对重金属Pb2+、Zn2+和Cu2+具有抗性的真菌,命名为TL-3。以TL-3为实验菌株,在不同pH值、不同金属离子初始浓度、不同菌体量以及不同吸附时间条件下对Pb2+、Zn2+和Cu2+进行吸附实验,研究其吸附特性与对不同金属离子的吸附能力。结果表明,TL-3对Pb2+、Zn2+和Cu2+的最佳pH值为5.0。在最佳条件下,吸附量在Pb2+,Zn2+和Cu2+的初始浓度分别为200mg/L、300mg/L和200mg/L达到最大,分别为20.61mg/g,23.17mg/g和17.46mg/g。TL-3对三种重金属的吸附均在20h达到吸附平衡。  相似文献   

鱼腥藻对某些金属离子的吸附效应研究（Ⅱ）：鱼腥藻对金（Ⅲ）的吸附   总被引：6，自引：0，他引：6  

何金兰 《岩矿测试》1995,14(3):231-233

在ＰＨ５－７的缓冲介质中，鱼腥藻吸附Ａｕ＾３＋，然后用６ｍｏｌ／ＬＨＣｌ洗脱，回收率在９８％－１００％。在选定条件下，鱼腹藻对Ａｕ＾３＋的最大吸附量为１５．７－１８．８ｍｇ／ｇ。所拟方法可供低含量Ａｕ＾３＋溶液中Ａｕ＾３＋的富集。  相似文献   

Biosorption studies on shelled Moringa oleifera Lamarck seed powder: Removal and recovery of arsenic from aqueous system     

Pushpa Kumari  Parul SharmaShalini Srivastava  M.M. Srivastava 《International Journal of Mineral Processing》2006

The present study explores the unexploited sorption property of the shelled Moringa oleifera seeds (SMOS) for decontamination of arsenic from water bodies. Sorption studies (batch experiments) result into the standardization of optimum conditions for removal of 60.21% As(III) and 85.60% As(V) as follows: biomass dosage (2.0 g), metal concentration (25 mg/L), contact time (60 min) and volume of the test solution (200 ml) at pH 7.5 and 2.5, respectively. The adsorption data are fitted with Langmuir isotherm. Surface area has been measured using BET surface area analyzer. Morphological changes observed in scanning electron micrograph of native and treated SMOS indicates the existence of biosorption process. Fourier transform infrared spectrometry of exhausted seed biomass highlights protein/amino acid–arsenic interactions responsible for sorption phenomenon. Regeneration has also been attempted for several cycles with a view to restore the sorbent to its original state. The sorption capacity of the regenerated biomass remained almost constant after three cycles of sorption process, suggesting that the lifetime cycle was sufficient for continuous application. The findings open up new avenues in the decontamination of arsenic using SMOS from arsenic contaminated water, as domestic and environment-friendly safe technology.  相似文献   

海藻生物吸附金属离子技术的特点和功能   总被引：14，自引：1，他引：14  

王宪  徐鲁荣  陈丽丹  李文权 《台湾海峡》2003,22(1):120-124

生物吸附技术是环境领域近年来迅速发展起来的处理工业污染废水的新技术。它以各种生物（菌类或藻类）吸附废水中的重金属离子，具有吸附容量大、选择性强、效率高、消耗少，并能有效地处理含低浓度重金属离子废水等优点。本文对国内外当前生物吸附金属离子技术的研究与应用进展作了综述，包括生物吸附技术的优越性，生物吸附剂的分类与来源，生物吸附的机理，影响生物吸附的因子，生物吸附剂的洗脱及固定化等问题。通过对这些工作的了解，使我们对方兴未艾的海藻生物吸附技术理论基础和实际应用研究有更确切的认识。这些理论基础研究工作为该项技术进一步研究发展打下了实际应用基础。  相似文献   

正常生长的钝顶螺旋藻去除Cd能力研究     

王红叶  杨芳  郑文杰  白燕 《海洋通报》2007,26(4):56-60

研究了不同的培养方式(CdCl2浓度、胁迫时间、接种藻密度等)下钝顶螺旋藻(Spirulina platensis)的去除Cd的能力。结果表明:随着CdCl2浓度的增大,藻体总吸附量呈递增趋势,其中藻体表面吸附量远远大于细胞内含量,占总吸附量的95%以上。培养96h,藻体总吸附量比培养10d小,但单位藻质量去除Cd的能力却高于培养10d的实验组。在其它条件不变的情况下,接种藻密度对藻体去除Cd的能力影响不大。  相似文献   

藻粉的交联方法与吸附效率的研究     

钱爱红  王宪  陈丽丹  郑盛华  邱海源 《台湾海峡》2005,24(1):72-77

本文研究了甲醛、戊二醛、甲醇作交联剂对海带藻粉进行化学交联后，不同交联方式对Cu^2 、Cd^2 的吸附率的影响，并与未交联的藻粉吸附Cu^2 、Cd^2 的效果进行了比较．同时分析了藻粉对Cu^2 、Cd^2 金属离子吸附动力学方程，探讨了pH值、温度、藻粉颗粒粒径等因素对吸附率的影响．  相似文献   

海藻生物吸附金属离子的机理和影响因素   总被引：3，自引：0，他引：3  

王宪  陈丽丹  徐鲁荣  钱爱红  李文权 《台湾海峡》2003,22(2):262-268

本文在前文“海藻生物吸附金属离子技术的特点和功能”的基础上，进一步阐述了生物吸附的机理，影响生物吸附的因子，生物吸附剂的洗脱及固定化等问题．通过对这些工作的了解，使我们对正在发展的海藻生物吸附技术理论基础和实际应用研究有更确切的认识、这些理论基础研究工作正是为对该项技术发展的进一步研究打下实际应用基础。  相似文献   

Biosorption and desorption of Cd^2＋ from wastewater by dehydrated shreds of Cladophorafascicularis     

邓莉萍  朱校斌  苏营营  苏华  王新亭 《中国海洋湖沼学报》2008,26(1):45-49

The adsorption and desorption of algae Cladophora fascicularis and their relation with initial Cd^2＋ concentration, initial pH, and co-existing ions were studied. Adsorption equilibrium and biosorption kinetics were established from batch experiments. The adsorption equilibrium was adequately described by the Langmuir isotherm, and biosorption kinetics was in pseudo-second order model. The experiment on co-existing ions showed that the biosorption capacity of biomass decreased with an increasing concentration of competing ions. Desorption experiments indicated that EDTA was efficient desorbent for recovery from Cd^2＋. With high capacities of metal biosorption and desorption, the biomass of Cladophora fascicularis is promising as a cost-effective biosorbent for the removal of Cd^2＋ from wastewater.  相似文献   

Sorptive flotation for metal ions recovery   总被引：2，自引：0，他引：2  

K. A. Matis  A. I. Zouboulis  N. K. Lazaridis  I. C. Hancock 《International Journal of Mineral Processing》2003,70(1-4):99-108

In this study, the abstraction of nickel, copper and zinc ions from aqueous solutions has been investigated in a laboratory batch scale mode. A combined two-stage process is proposed as an alternative of the heavy metals removal from aqueous solutions. The first stage is the sorption of heavy metals onto non-living microorganisms followed by dispersed-air flotation of the loaded biomass. Three types of strains were used: Penicillium chrysogenum, Saccharomyces carlsbergensis and Streptomyces rimosus. The main parameters studied were solution pH, biomass concentration, surfactant concentration and flocculant concentration. The biomass reuse after elution was also examined. Remediation is a possible application of flotation being cost-effective and with readily available equipment and know-how. The application of this process looks promising.  相似文献   

Biosorption Behavior and Mechanism of Lead （Ⅱ） from Aqueous Solution by Aerobic Granules （AG） and Bacterial Alginate （BA）     

WANG Lin  LI Yu 《青岛海洋大学学报(英文版)》2012,(4):495-500

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