阴离子染料酸性大红GR水溶液的脱色及反应机理

以阴离子染料酸性大红GR为代表,采用十二胺做助剂,硫酸铝做混凝剂对其水溶液进行脱色处理,研究了助剂、混凝剂投加量、pH值及其盐效应等的影响．通过电导率、丁达尔效应和IR谱图分析其脱色机理：阴离子染料在水溶液中与十二胺之间发生化学反应,靠氢键和静电键结合,使染料微粒聚集形成胶体,再与硫酸铝混凝剂作用产生沉淀．     

菌株Enterobactor sp.S8对不同结构偶氮染料脱色性能的影响

采用一种具有广谱性的高效脱色菌Enterobactor sp.S8对16种不同结构的偶氮染料进行厌氧脱色研究,并将菌株对偶氮染料的吸附脱色和降解脱色两种作用分离开来研究,考察偶氮染料分子中与偶氮键直接相连的芳环上取代基种类对染料降解脱色作用的影响规律.结果表明,菌株Enterobactor sp.S8对活性染料的脱色作...     

电化学在线制备高铁氧化脱色偶氮染料酸性红B的研究

模拟染料废水自身的碱度为电化学在线制备高铁提供了碱性环境，研究高铁氧化酸性红B．结果表明，在氢氧化钠投加量为10g，电流强度为1A，连续搅拌的条件下，酸性红B在3h后的脱色率可达到90％以上，增大酸性红B的初始浓度，脱色去除率可达到同样的效果，但高铁在单位时间内处理的量相对增大，高铁在线脱色酸性红B的化学氧化反应符合一级反应动力学，同时，根据UV—Vis谱图和模拟电极反应进程对电化学生成高铁氧化酸性红B的降解机理作了初步的探讨．     

响应面法优化一株链霉菌对偶氮染料AR30的降解脱色条件

以一株对偶氮染料红30(AR30)具有较强降解脱色作用的菌株Streptomyces sp.FX649为研究对象,在单因素实验基础上,选择染料初始浓度、培养时间、pH与培养温度为主要因素,采用Box-Benhnken组合实验和响应面分析法对降解条件进行了精确优化.经实验修正,获得了最佳降解脱色条件,即在染料浓度110 mg.L-1、培养时间36 h、pH 7.3与培养温度31.3℃时该菌对染料AR30的降解脱色率为95.1%.     

SiO2柱层状钛酸的制备、表征和光催化性能研究

采用逐步交换法,将含硅多聚物嵌入到层状钛酸的层间,通过焙烧制得SiO2柱层状钛酸(SiO2-H2Ti4O9)光催化剂.用X射线衍射(XRD)、红外吸收光谱(IR)、紫外-可见漫反射吸收光谱(UV-vis)和比表面积等测定方法对催化剂进行了表征.结果表明,SiO2-H2Ti4O9的层间距由钛酸钾的0.88nm增加到1.35nm,比表面积由5.4 m2·g-1增大到133.3 m2·g-1.另外,通过对酸性大红GR的光催化降解反应,考察了所得催化剂的光催化活性.     

环境和营养条件对煤油生物降解的影响

研究了南极假丝酵母（Candida antarctica)JWSH-112降解煤油烃的影响因素。利用正交试验方法，确证了最优条件为煤油14（ψ/%），NaNO32.0gL61,NaH2PO40.1gL^-1，蛋白胨2.0gL^-1，初始pH6.5，其中蛋白胨是影响JWSH－112降解煤油烃的重要因素。采用优化后的条件进行验证实验，煤油烃的生物降解率（49．2％）和细胞生长质量浓度（1.9gL^-1)均加高于正交试验中的最高生物降解率（47．9％）和细胞生长质量浓度（1.5gL^-1)。通过气相色谱定性分析发现，生物降解后煤油中的部分组份消失或含量明显降低。图6表5参13     

氟苯酚好氧生物降解性能及其与化学结构的相关性研究

利用OxiTopBOD测试仪测定微生物耗氧量的方法,对邻氟苯酚、间氟苯酚和对氟苯酚的好氧生物降解性能进行了研究,结果表明:邻氟苯酚、间氟苯酚和对氟苯酚的耗氧生物降解速率常数分别是0.0093L·g-1·h-1,0.0133L·g-1·h-1和0.0145L·g-1·h-1.降解活性与化学结构的相关性分析表明:辛醇/水分配系数和分子连接指数是影响受试物好氧生物降解性能的两个重要因素.     

紫外光照射下铁锰物种对酸性橙Ⅱ的脱色研究

以高铁酸钠原液对酸性橙Ⅱ进行氧化脱色,并对比了高锰酸钾在紫外光照射下的脱色能力.结果表明,254 nm紫外光照射提高了高铁酸钠原液与高锰酸钾的脱色效能,而且紫外光和高铁酸钠原液联合使用时,对染料的脱色速率是单独紫外光和单独高铁酸钠原液脱色速率的1.11倍,产生了一定的协同作用.通过对比紫外光照射下硝酸铁和硫酸锰的脱色能力,证明低价态的水合Fe(Ⅲ)物种具有较强的光反应性,异丙醇淬灭试验证明产生了大量羟基自由基.另外,在所考察的pH范围内,无论紫外光照射与否,相对于硫酸锰和高锰酸钾,硝酸铁和高铁酸钠原液都保持了较高而稳定的脱色能力.     

层状氢氧化镁铝对染料酸性橙Ⅱ的脱色性能

分别用层状氢氧化镁铝(LDHs)和焙烧层状氢氧化镁铝(CLDH)作为吸附剂,吸附脱除水溶液中染料酸性橙Ⅱ,考察了Mg/Al物质的量之比、吸附剂的投加量、脱色时间、初始pH值等因素对脱色率的影响.结果表明,以Mg/Al物质的量之比为3制得的层状氢氧化镁铝对酸性橙Ⅱ溶液的脱色效果最好;室温下,3.0 g·L-1LDHs和1...     

酸性矿山排水影响下水库及其入库流域水体细菌多样性与环境因子的关系

为了解酸性矿山废水排水处沿流域至水库底层水体细菌群落结构的沿程变化,探索其环境影响因素.采用高通量测序技术并结合主成分分析（principal component analysis,PCA）方法,对2019年9月采集受酸性矿山废水（acid mine drainage,AMD）影响的12个水样进行研究.结果表明,入库流域水样中细菌群落多样性变化趋势不明显,从表层至底层细菌多样性不断升高.在门水平上受AMD影响的细菌主要由变形菌门（Proteobacteria）、拟杆菌门（Bacteroidetes,0.21%—12.96%）、厚壁菌门（Firmicutes,0.15%—14.4 8%）和放线菌门（Actinobacteria,0.06%—4.64%）构成.其中,变形菌门中的α-变形菌纲（Alphaproteobacteria,2.42%—61.99%）、β-变形菌纲（B etaproteobacteria,1.29%—63.53%）和γ-变形菌纲（Gammaproteobacteria,6.41%—63.09%）为优势菌类.从不同空间位置浮游细菌群落组成来看,不动杆菌属（Acineto...     

Application of Fe0/C/Clay ceramics for decoloration of synthetic Acid Red 73 and Reactive Blue 4 wastewater by micro-electrolysis

Dyes are common pollutants in textile wastewaters, and the treatment of the wastewater has now attracted much attention due to its wide application and low biodegradability. In this study, Fe⁰/C/Clay ceramics, a kind of novel micro-electrolysis filler, were sintered and employed in a dynamic micro-electrolysis reactor for synthetic Acid Red 73 (AR73) and Reactive Blue 4 (RB4) wastewater treatment. The effects of influent pH, hydraulic retention time (HRT), and aeration on the decoloration efficiencies of AR73 and RB4 were studied. The optimum conditions for wastewater treatment were: AR73, influent pH of 4, HRT of 2 h and aeration; RB4, influent pH of 5, HRT of 6 h and aeration. Under the optimum conditions, decoloration efficiency of AR73 and RB4 wastewater was 96% and 83%, respectively. Results of UV-vis spectrum scanning demonstrated that the chromophores were broken. Continuous running tests showed that improvement of micro-electrolysis system with Fe⁰/C/Clay ceramics for AR73 and RB4 synthetic wastewater treatment could avoid failure of micro-electrolysis reactor, which indicated great potential for the practical application of the ceramics in the field of actual industrial wastewater treatment.     

Biological Decolorization of C.I. Basic Green 4 Solution by Chlorella sp.： Effect of Operational Parameters

In recent years, the ability of microorganisms to decolorize textile wastewater has received great attention due to the environmental persistence and toxicity of these pollutants. In this paper biological decolorization of triphenylmethane dye, C.I. Basic Green 4 (BG 4), by Chlorella species was investigated. The effect of operational parameters (temperature, pH, initial dye concentration and algal concentration) on decolorization efficiency was examined. Results indicated that the desired initial pH was 9. The stability and efficiency of the algae in long-term repetitive operations were also examined. Michaelis-Menten kinetics was employed to describe the apparent correlation between the decolorization rate and dye concentration. The optimal kinetic parameters, Vmax (specific decolorization rate) and Km (maximum specific decolorization rate) were 4.6 mg dye g cell-1 h-1and 151.0 mg L-1, respectively. Fig 10, Tab 2, Ref24