沉降——分离法除去氢氧化镁中的氯

研究了絮凝剂法及控制反应温度法两种沉降——分离方法除去水氯镁石-氢氧化钠法制备氢氧化镁中的氯。     

永平铜矿选矿厂减少硫精矿浓密池硫流失生产实践

针对近两年永平铜矿矿石性质发生变化后，造成硫精矿浓密池跑浑严重的问题所采取的一些技术措施和管理措施，在减少硫精矿浓密池硫流失方面取得了较好的成效，对同类型矿山有一定的借鉴作用。     

阳离子高分子絮凝剂F2合成及表征

以淀粉、丙烯酰胺、环氧丙基三甲基氯化铵为原料,合成了高密度阳离子有机高分子絮凝剂F2,并用红外光谱进行了表征。分子量为66万,F2对石油污水的澄清效果比常用的分子量为800万的聚丙烯酰胺絮凝剂效果好。投加量3 3mg/L时,废水色度的去除率在91%以上。F2与Q6a或Q6b配合絮凝时效果更好。     

改性淀粉絮凝剂的研究

改性淀粉絮凝剂具有无毒、原料来源广、价格低、易于生物降解等优点,近年来得到重视和发展应用。综述了接枝类改性淀粉絮凝剂、离子化改性淀粉絮凝剂如淀粉醚类化合物以及淀粉黄原酸脂类等天然改性淀粉絮凝剂的研究进展及在水处理中的应用。提出改性淀粉絮凝剂未来的发展前景和研究方向。利用我国极为丰富的淀粉资源,开发出更多高效、无毒、价廉的改性淀粉絮凝剂,以满足各种废水处理的不同需要;开发以淀粉为原料的改性天然高分子絮凝剂具有重要的现实意义。     

不同培肥管理措施对土壤微生物生态特征的影响

本文研究了厩肥区、秸杆区、化肥区和无肥对照区四种不同培肥管理措施对土壤微生物生态特征的影响,结果表明,施入厩肥、化肥或秸杆还田均能明显增加土壤微生物生物量及呼吸量;土壤微生物生物质量、土壤呼吸及代谢商等微生物指标均与土壤有机质的变化呈相同的变化趋势;BIOLOG生态盘测试亦揭示了培肥管理措施能明显影响土壤微生物的群落结构。     

微生物腐蚀机制及检测方法

生物膜在自然界无处不在,但生物膜造成的腐蚀却基本上被忽略。综述了微生物尤其是硫酸盐还原菌的腐蚀机理,并对微生物腐蚀研究方法做了简单介绍,以期对火电厂微生物腐蚀的研究工作有一定的帮助。     

微生物絮凝剂的研究及应用

介绍微生物絮凝剂的发展历史、优点和作用机理，阐述其在给水和废水处理方面的应用情况。指出欲使微生物絮凝剂部分或全部取代现有的絮凝剂，还有许多问题需要研究。     

Effect of Exogenous Rare Earths on Microbial Characteristics in Paddy Soil

Duetoincreasingcropyieldsandimprovingcropquality ,REammoniumhydrogencarbonatecomplexfertilizerwereappliedwidelyinsoils ,whichacceler atetheaccumulationofREinsoilsafteragriculturalapplication[1,2 ] .Previousstudieshavereportedaccu mulationofREsinsoilissignificantafter 3monthsofagriculturalapplication[3] ,andREhardlymigratedownward[4 ] .Itiscertaintythatagriculturalapplica tionofREcanresultREaccumulationinsoilandmayhaveaneffectonsoilmicrobialactivities .Soilmicro bialbiomassisamarkerofthemi…     

Effects of electron beam irradiation on microbial inactivation and quality of kimchi paste during storage

The effects of electron beam irradiation on microbial inactivation and quality of noninoculated and inoculated (Listeria monocytogenes) kimchi pastes were examined. Kimchi paste samples were irradiated at doses of 2, 4, 6, 8 and 10 kGy and stored for 21 days at 4 °C. Irradiation (10 kGy) reduced the populations of total aerobic bacteria, lactic acid bacteria, and yeast and moulds in the samples by 1.72, 2.24 and 0.86 log CFU g^?1, respectively, compared to the control. In particular, coliforms were not detected at 8 and 10 kGy, and the population of L. monocytogenes in inoculated samples was significantly decreased by 2.67 log CFU g^?1. Electron beam irradiation delayed the changes in O₂ and CO₂ concentrations, pH, acidity and reducing sugar content observed in kimchi paste during storage. These results suggest that electron beam irradiation can be used to improve the microbiological safety and shelf life of kimchi paste.     

Copper anode corrosion affects power generation in microbial fuel cells

Non‐corrosive, carbon‐based materials are usually used as anodes in microbial fuel cells (MFCs). In some cases, however, metals have been used that can corrode (e.g. copper) or that are corrosion resistant (e.g. stainless steel, SS). Corrosion could increase current through galvanic (abiotic) current production or by increasing exposed surface area, or decrease current due to generation of toxic products from corrosion. In order to directly examine the effects of using corrodible metal anodes, MFCs with Cu were compared with reactors using SS and carbon cloth anodes. MFCs with Cu anodes initially showed high current generation similar to abiotic controls, but subsequently they produced little power (2 mW m^‐2). Higher power was produced with microbes using SS (12 mW m^‐2) or carbon cloth (880 mW m^‐2) anodes, with no power generated by abiotic controls. These results demonstrate that copper is an unsuitable anode material, due to corrosion and likely copper toxicity to microorganisms. © 2013 Society of Chemical Industry