共查询到18条相似文献,搜索用时 203 毫秒
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培养SRB处理高浓度硫酸盐废水 总被引:1,自引:0,他引:1
通过富集培养SRB菌,检测后分离纯化,处理高浓度硫酸盐废水,硫酸根还原率达到92.73%.并阐述了SRB还原硫酸根的几个影响因素,并提出了这方面研究存在的问题. 相似文献
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《铀矿冶》2002,21(1)
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为原位治理高硫煤矿区酸性矿井水,建立微生物燃料电池污泥厌氧发酵-硫酸盐还原菌耦合体系,考察了电极类型、阳极面积、极间距、离子浓度对产电性能和处理酸性矿井水中的硫酸盐效果的影响。单因素试验结果表明,碳布为阳极、极间距适中(3 cm)时,产电最佳;阳极面积越小、NaCl浓度越高,功率密度越大;硫酸根去除率的最佳条件为:碳布为阳极、极间距为5 cm、离子浓度适中,阳极面积越大,对硫酸根去除率越高。以硫酸盐去除最佳条件构建单室无膜碳片为阳极的耦合产电体系,所产生的最大功率密度为2.093 3 mW/m 2,10 d后污泥的COD去除率为43%,废水SO 2-4的平均去除速率达194.4 mg/(L·d -1),最高去除率为64%,比开路时的SO 2-4去除率提高24%。污泥厌氧发酵-硫酸盐还原菌耦合产电体系可同时实现降解剩余污泥和处理含SO 2-4废水。 相似文献
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探讨温度、pH、初始铀质量浓度以及共存离子等因素对SRB还原U(Ⅵ)的影响,重点分析共存离子对SRB还原U(Ⅵ)的影响。结果表明:Cu2+和Zn2+对SRB有抑制作用,Cu2+比Zn2+毒性更强;低质量浓度的SO42-对SRB还原U(Ⅵ)没有影响,但其质量浓度高于5 000 mg/L时产生强烈的抑制作用;NO3-的存在会严重抑制SRB还原沉淀U(Ⅵ),只有先彻底去除NO3-才能利用SRB还原沉淀U(Ⅵ);Fe0对SRB还原U(Ⅵ)有协同促进作用。 相似文献
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黑曲霉溶解磷矿粉矿化水体中铀的研究 总被引:1,自引:0,他引:1
《铀矿冶》2017,(4)
开展了采用黑曲霉溶解磷矿粉释放可溶性正磷酸盐,进而矿化水体中铀的研究。试验结果表明:黑曲霉具有良好的溶磷效果,22d后废水中的磷质量浓度可达到242.32mg/L;黑曲霉能够将废水中的铀质量浓度从50.00mg/L降至2.32mg/L,铀的去除率达95.36%;铀的去除率和溶液中磷质量浓度呈正相关性关系,相关性系数为0.92。采用能谱仪对矿化产物进行分析,能谱图中出现了较明显的铀元素信号峰,表明铀与正磷酸盐结合生成了不溶于水的U-P矿物。 相似文献
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为了研究硫酸盐还原菌和稻壳联合生物反应器在重金属废水处理中作用及机理。利用实验室前期分离鉴定的硫酸盐还原菌Desulfuromonas alkenivorans S-7联合填充稻壳柱式生物反应器处理人工合成酸性重金属(Fe~(3+),Mn~(2+),Cr~(6+))废水。比较了废水处理过程中理化特性(pH,E_h,E_c)及3种重金属离子变化规律,并利用FT-IR光谱仪分析了微生物和稻壳联合处理作用下重金属离子去除特性。研究结果表明:S-7能够明显提高酸性废水的pH,20 d后pH最终稳定在6.20左右,也能使反应体系维持在较高的还原环境并降低体系的电导率。S-7菌株对3种代表性离子都有一定的处理效果,对Fe,Mn,Cr三种金属离子的去除效率分别为FeMnCr。反应器处理前期废水中离子的去除速率较快,后期由于离子共存对废水处理的影响使废水中金属离子浓度趋于平衡,出现动态制约平衡,S-7菌株对3种重金属离子的去除机制可能存在差异。处理后期由于Cr~(6+)浓度上升明显,增大了SRB反应器中的重金属含量,明显影响SRB反应器的稳定性能;稻壳填充对S-7菌株生长能够稳定维持SRB反应器的厌氧环境,并且稻壳对金属离子去除也存在一定程度的物理吸附作用。FT-IR分析表明:S-7菌体处理废水时会吸附Fe,Mn,Cr离子,其中羟基、胺基、酰胺基及羧基是发生吸附作用重要的官能团;稻壳在处理重金属废水前后,稻壳的Si—O—Si和羰基在处理重金属废水中可能发挥了作用。 相似文献
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L. A. Bernardez L. R. P. de Andrade Lima C. L. S. Ramos P. F. Almeida 《Mine Water and the Environment》2012,31(1):62-68
The effects of initial sulfate concentration on anaerobic sulfate reduction and sulfide generation kinetics were investigated in an up-flow bioreactor, using a consortium of sulfate-reducing bacteria (SRB) from water produced from a Brazilian oil reservoir. Redox potential and sulfate concentration were measured to indicate the growth and activity of the SRB throughout the experimental runs. The results of the batch regime indicate that sulfate conversion and sulfide generation are both first-order processes for initial sulfate concentrations of 1,000 and 3,500?mg/L. The kinetic constants for the sulfate conversion indicate that the enhanced initial sulfate content was initially inhibiting, but that the sulfide generation reaction is almost independent of the initial sulfate concentration, likely due to the presence of at least two in-series processes that are faster than the microbial conversion of the sulfate. 相似文献
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利用从黄土中分离的硫酸盐还原菌修复煤矸石酸性污染,以乳酸钠作碳源,探讨了加不同量碳源和不同接种量情况下硫酸根的去除率,并对煤矸石浸液的pH值、氧化还原电位和电导率的变化作定量测定,研究了硫酸盐还原菌的几种影响条件.实验结果表明:利用硫酸盐还原菌来修复煤矸石酸性污染的思路可行,向煤矸石中接种硫酸盐还原菌硫酸根最高转化率可达95.5%,可提高煤矸石浸液的pH值,降低其氧化还原电位和电导率,从源头上抑制酸矿水的产生,能有效控制含硫煤矸石在降雨酸性淋溶的环境污染. 相似文献
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用离子交换法去除贫铀溶液中硝酸根的研究 总被引:3,自引:0,他引:3
由于铀溶液中的硝酸根对阴离子交换树脂具有较强的亲合力,相当低的硝酸根就足以干扰硫酸铀酰离子的吸附。利用一种高效吸附硝酸根的阴离子交换树脂吸附铀溶液中的硝酸根,再用NaOH溶液解吸,淋洗合格液中ρ(NO3^-)达60g/L左右。试验结果表明,用N-3树脂对铀溶液中的硝酸根进行吸附,可以实现从铀溶液中回收硝酸根的技术要求。 相似文献
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Chicken manure, dairy manure and sawdust were evaluated as carbon sources in promoting sulfate reduction, and the mechanism of heavy metals removal in sulfidogenic bioreactor was revealed. The sulfate reduction reached 79.04% for chicken manure, 64.78% for dairy manure, and 50.27% for sawdust on 35th day, which showed that chicken manure could promote sulfate reducing bacteria (SRB) activity, followed by dairy manure and sawdust. In batch experiment, although chicken and dairy manure bioreactors showed sulfidogenic activity, it demonstrated less than 5% contribution from sulfide precipitation and over 95% from other removal mechanisms (sorption to manure particles and hydroxides precipitation, etc.). Column bioreactor showed satisfactory performance in biological remediation of acid mine drainage, evidenced by effluent Eh and pH, high removal efficiencies of sulfate and metals, and a considerable SRB counts. SEM–EDS analysis of the formed precipitate showed metal sulfides were formed. The results indicated that organic waste played an important role in sulfidogenic activity, which could not only provide reducing condition and carbon source for sulfate reduction process, but also reduce the adverse effect of heavy metal and strong acidity on SRB activity owning to metals sorption and acidity buffer of organic waste. 相似文献
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Din Islamud Khan Sardar Hesham Abd El-Latif Irum Sidra Daqiang Cang 《Mine Water and the Environment》2023,42(2):340-347
Mine Water and the Environment - Microbial bioremediation of metals in wastewater by sulfate-reducing bacteria (SRB) has received much attention due to its high efficiency, eco-friendly techniques,... 相似文献