共查询到19条相似文献,搜索用时 171 毫秒
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从性能稳定的实验室规模A/O反应器沉淀池剩余污泥中分离出一株除磷性能较强的菌株P10,该菌最适生长初始pH和除磷初始pH分别为6.5和6.0;最适培养温度和除磷温度均为30℃;铁离子、锰离子及铜离子对菌体生长起促进作用,铁离子、锰离子对除磷也起促进作用,其中铁离子作用最好,可以提高菌浓8.1%,提高除磷量46.0%;菌体对磷酸氢二钾状态存在的磷去除效果最好,为11.23 mg/(g·h)。 相似文献
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蒙脱土因具有独特的层状结构而表现出良好的吸附和离子交换性能,在许多废水处理中有着广泛的应用。本文介绍了蒙脱土在处理含重金属离子废水、含有机污染物废水、印染废水以及造纸废水等领域中的应用,同时对其在制革废水中的应用前景作了展望。 相似文献
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柑橘皮对重金属生物吸附的研究进展 总被引:1,自引:0,他引:1
重金属污染物在环境中十分稳定,并且具有相当高的难去除性,对人类的生命和健康造成直接或间接的危害。生物吸附法是一种很有潜力的新兴重金属去除技术,也是一种有效、可行、环境友好的方法,对污水处理具有重大意义。柑橘皮价格低廉,去除重金属效果好,易于得到,成本低,并且具有技术可行性,工业化实用性以及对生物吸附剂再生和金属回收的可能性,因此其具有广阔的应用前景。综述了利用柑橘皮作为吸附剂处理重金属离子的研究现状、吸附机理和影响吸附剂的吸附因素,并对其发展前景作了展望。 相似文献
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改性花生壳捕集废水中重金属离子研究 总被引:1,自引:0,他引:1
以花生壳为原料,通过酸性甲醛溶液对花生壳进行改性。利用离子交换的原理,考察了反应时间、处理剂加入量、pH值及反应温度对酸性废水中重金属离子吸附性能的影响。结果表明,用酸性甲醛溶液对花生壳进行适当改性,改性产物用来去除水中的重金属离子是可行的。处理重金属废水时,较佳的工艺条件为:控制pH值为7,每100mL废水加入2.5g改性花生壳,在40℃下,搅拌反应60min。在此夸件下,捕集率可达90%以上。 相似文献
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S. Farag 《Starch - St?rke》1995,47(5):192-196
A new cationic exchanger was synthesized through a complex system involving reactions of starch or modified starches, phenol and formaldehyde in presence of HCl, followed by sulphonation using sulphuric acid. Major properties of these resins including exchange capacity, swellability, solubility, ability to remove heavy metals were studied and compared with those of sulphonated phenol formaldehyde resin. This was done to signify the importance of the presence of the starch or the modified starches in the backbone of the resin. Tentative mechanisms for the reactions involved in the synthesis of such cation exchangers is also reported. 相似文献
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根霉固体发酵产生的粗纤溶酶液中含有许多的色素物质,这些色素物质在酶的分离提纯中会污染色谱分离填料,严重影响填料的分离度和使用寿命,选择D301和D296离子交换树脂、活性碳和高岭土作为脱色介质,对粗纤溶酶液进行脱色实验研究,实验结果表明,当树脂的反离子采用Cl^-型时,D301和D296离子交换树脂可以用于粗纤溶酶液的脱色,脱色过程对目标纤溶酶还有一定的提纯作用。 相似文献
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In the present study model solutions containing isolated apple polyphenols were employed to systematically study their interaction with two strong anion exchangers differing in the structure of their polymeric matrix. Equimolar concentrations of catechin, caffeic acid, 5-O-caffeoylquinic acid (chlorogenic acid), phloridzin and rutin were used in single compound, binary, ternary, quaternary and pentenary model systems to investigate their ion exchange and adsorption behavior when brought into contact with a polystyrene-divinylbenzene-based and a polyacrylamide-based ion exchanger resin in a column system. To enhance differentiation between adsorption phenomena involving the lipophilic backbone of the exchanger resin and ion exchange processes, experiments were performed at pH 1 and 7. The results of this study allow a deeper insight into the complex processes occurring upon ion exchange. Significant differences were found using the two ion exchangers with the polystyrene resin showing higher recovery rates indicating that the polymeric backbone also markedly contributes to polyphenol binding through hydrophobic interactions. Furthermore, resin selectivity with regard to the binding of phenolic compounds was also shown to be dependent on the structure of the exchanger matrix. These results may further contribute to improve industrial processes for the cost-efficient and selective recovery of secondary plant metabolites, thus allowing to systematically manipulate the biofunctional properties of plant extracts. 相似文献
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高健 《皮革制作与环保科技》2022,3(2):10-12
本文首先从离子交换树脂结构和分类、离子交换原理、离子交换树脂应用范围、离子交换树脂回收再利用等方面阐述离子交换树脂水处理工艺,然后从仪器和试剂、离子交换树脂复苏类型、复苏原理及复苏结果等方面阐述离子交换树脂再生复苏工艺,再从仪器和试剂、复合材料制备与测定、吸附量测定、有机染料测定、测定结果分析等方面阐述离子交换树脂活性... 相似文献
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分别用阴离子树脂和阳离子树脂对酪蛋白磷酸肽(CaseinPhosphopeptide,简称CPP)初级品N/P(摩尔比r为7.52)进行纯化.采用阴离子树脂纯化CPP的回收率为P98.71%;N82.78%;高纯度CPP产品的r(N/P)为5.44.对阳离子树脂纯化CPP做了初步探讨,研究了不同pH对纯化效果的影响.在pH5.0的最优条件下,回收率P为81.85%,N为53.80%,r(N/P)为4.67.与阴离子树脂纯化CPP的过程相比,用阳离子树脂纯化CPP时,树脂在使用前无需转型处理,洗脱条件简单,从而大大地缩短了操作时间,并且提高了产品的浓度. 相似文献