共搜索到9809条信息，每页显示10条信息，共981页。用时：0小时0分0秒598毫秒
for long time illumination. The mechanism research results indicate that Ce3+ treatment can significantly decrease accumulation of active oxygen free radicals such as O2·- and H2O2, and reduce the level of malondialdehyde (MDA), and maintain stability of membrane structure of chloroplast under light. It is shown that the redox took place between cerium and free radicals, which are eliminated......
concentration can reach 83.8%. Key words: micro-electrolysis; organic wastewater; ·OH radicals; EDTA 目前,有机废水的处理技术多为传统的生物法[1-3]处理,对于焦化废水,染料废水,造纸废水,农药和制药废水等富含难降解有机物的典型废水,由于这类废水可生化性生化耗氧量与化学耗氧量比值一般为0.3以下甚至更低...新型铁炭微电解法降解EDTA有机废水 陈润华,柴立元,王云燕,舒余德,蒋国民 (中南大学 冶金科学与工程学院,湖南 长沙,410083) 摘要:开发一种基于铁炭微电解处理有机废水的新方法,处理乙二胺四乙酸(EDTA)难降解有机废水.采用活性炭作氧电极载体,铁粉为阳极,在酸性富氧条件下产生的·OH自由基有效降解废水中的EDTA组分,根据微电池原理及Fenton反应导出羟基自由基·OH浓度的热......
): 665-672. [11] 张牧群, 尹周澜, 陈启元. 铝酸钠溶液中超声诱致自由基的检测[J]. 中国稀土学报, 2004, 22(z1): 207-211. ZHANG Mu-qun, YIN Zhou-lan, CHEN Qi-yuan. Inspection of the free radicals in sodium aluminate solution coursed...; 文献标志码:A Effect of ·OH radical on cyclization reaction of trimer aluminate ions (Al3-B cluster) YIN Zhou-lan, DING Zhi-ying, LI Jun, ZHANG Mu-qun (School of Chemistry and Chemical......
to that of α-nickel hydroxide, and it has a large interlayer distance, which is helpful for the diffusion of proton; OH- group in lanthanum doping nickel hydroxide is no longer at free structure phase, which...掺杂La的α-Ni(OH)2的制备及电化学性能 杨幼平, 张平民, 张友标, 唐有根, 刘开宇, 桑商斌 (中南大学 化学化工学院, 湖南 长沙, 410083) 摘要: 用化学共沉淀法制备掺杂La的Ni(OH)2. 通过X射线衍射和红外光谱对掺杂La的Ni(OH)2进行结构表征, 并采用模拟电池和循环伏安法对其电化学性能进行研究. 研究结果表明: 掺杂La的Ni(OH)2具有与α......
reduction and phenol degradation to some extent, but Al3+ has little influence on the treatment. In this synergistic reaction system, oxygen is necessary in generating the free radicals, such as hydroxyl... of synergistic and green wastewater treatment. Key words: hexavalent chromium; phenol; sulfite; free radicals; synergistic treatment 随着工业的发展,电镀,冶炼,制革,印染,制药等工业废水的排放,造成了六价铬的严重污染,且这些含铬废水中往往伴随着有机物的存在.苯酚(C6H6O)作为一种典型有......
.研究结果表明:控制溶液的碱度是制备磷酸铁锂前驱体Li2H2SiO4·Fe(OH)2的关键因素,若要利用Li+,Fe2+和在液相形成Li2H2SiO4·Fe(OH)2,则要维持溶液较高的碱度,使得Li+能与生成Li2H2SiO4沉淀,并且抑制FeH2SiO4的生成,使Fe2+以Fe(OH)2的形式沉淀；溶液体系的碱性越强,Li2H2SiO4·Fe(OH)2的优势区域越宽,更有利于Li2H2SiO4·Fe(OH)2的合成；采用液相法制备硅酸铁锂时,由于pH值大于15,体系的碱度较高,溶液中Fe2+极容易被氧化,故制备过程难以实现；而利用固相法制备硅酸铁锂,其保护性气氛容易控制,工艺简单,流程短,便于实现. 关键词:Li-Fe-Si-H2O体系；硅酸铁锂；热力学；Li2H2SiO4·Fe(OH)2 中图分类号:TQ021.2 ......
] Dalal N S, Shi X, Vallyathan V. Role of free radicals in the mechanisms of hemolysis and lipid peroxidation by silica: Comparative ESR and cytotoxicity studies[J]. Journal of Toxicology... of Toxicology and Environmental Health, Part A: Current Issues, 1988, 25(2): 237-245. [18] Vallyathan V, Shi X, Dalal N S, et al. Generation of free radicals from freshly fractured silica dust[J]. American......
angle were measured and calculated. 1) Solid surface free energy As the particle size distribution of the powder may have an impact on the contact angle, the Bayer industrial Al(OH)3 powder was screened... particle diameters The contact angles of the liquids glycerol- diiodomethane on the Al(OH)3 plates prepared from different samples were measured, and then the solid surface free energy was calculated......
Calculation of free energy of Al-Cu-Li alloy under electric field ZHANG Jian-jun(张建军)1, WANG Yong-xin(王永欣)1, CHEN Zheng(陈 铮)1, 2, LIU Bing(刘 兵)1 1. School of Materials Science and Engineering...; Abstract: Based on Thomas-Fermi model, the interior potential boundary condition with the effect of electric field was defined, the calculation method of free energy for atom cluster under......
CaCO3在铝酸钠溶液中的反苛化作用 李小斌,郑洁,齐天贵,王丹琴,张海宝 (中南大学 冶金与环境学院,湖南 长沙,410083) 摘要:在热力学计算的基础上,研究CaCO3在铝酸钠溶液体系中发生反苛化反应的规律.热力学计算表明,低温条件下,CaCO3与游离苛性碱形成Ca(OH)2的反苛化程度较小,而其与Al(OH)4-形成3CaO·Al2O3·6H2O(C3AH6)的反苛化反应显著.CaCO3在纯NaOH溶液中反苛化反应的反应率小于5%,而在铝酸钠溶液中其反苛化率可达50%以上,说明Al(OH)4-对CaCO3的反苛化具有显著的促进作用；CaCO3的反苛化率随温度的升高而升高,随铝酸钠溶液苛性比αk的升高呈先升高后降低的规律,当αk为3时,出现极大值；常压条件下,CaCO3在铝酸钠溶液中发生反苛化反应形成C3AH6,而造成氧化铝损失. 关键词:碳酸钙；反苛化；铝酸根离子(Al(OH)4......
