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The control standard of n itrogen and phos...

介绍了当前水体中、氮的控制标准和污水脱氮除(生化硝化、反硝化、生物除等)技术;同时适当选择了几例德国污水和地表水处理的典型工程实例。

The results show that the surface quality of phosphating film is obviously improved by ZY, and a uniform and compact coating can be obtained when phosphated at 20℃ for about 20 minutes, which is 1.09 g/m^2 in weight, can withstand CuSO4 solution dropping for above 200 s, and resist mass fraction of 3% NaCl solution soaking for more than 5 hours.

结果表明,成膜助剂ZY明显地改善了化膜的表面质量,在20℃、化20min时可以获得均匀致密的化膜,膜重为1.09g/平方公尺,耐CuSO4点滴时间超过200s,质量分数为3%的NaCl溶液浸泡时间超过5h。

After titanium was phosphated with H_3PO_4 and TEP, the elements of P, C, 0, Ti and the radicles of P-O-C,-PO_3,-PO_4 were detected by X-ray photoelectron spectroscopy and the Fourier transformed infrared spectroscopy. It presents that the phosphorus had been bonded onto the titanium surface with chemical combination.

纯钛表面经过化处理,通过X光电子能谱和红外光谱分析可知,表面分别检测到了P、O、C、Ti元素和P-O-C、-PO_3、-PO_4等原子团,说明化处理可以有效的使元素以化学键合的方式引入表面。

On the basis of ascertaining that phosphomolybdic acid modified platinum electrode has higher catalytic activity to methanol oxidation , three kinds of transition metal substituted phosphomolybdic acids were synthesized, and the IR spectrum indicated that the compounds still kept Keggin structure.

在证实了钼酸修饰铂电极对甲醇氧化具有较高活性的基础上,合成了3种过渡金属取代的钼酸,通过红外光谱测试仍为Keggin结构,并制备了过渡金属取代钼酸修饰铂电极,研究了修饰铂电极在硫酸溶液中的电化学行为及对甲醇的催化氧化作用。

The experts also simulated the phenomenon of natural fire in Luo Maozai's home: the phosphoreted mineral was decomposed into the gas of phosphoreted hydrogen under the condition of bacteria. The gas of phosphoreted hydrogen burns spontaneously under given conditions of moist air and then ignites the methane in the air which comes from the mouse holes.

专家组成功地模拟了罗家的&自燃&现象:含的矿物质在有细菌和具备还原性条件下分解成化氢气体,而化氢气体在一定潮湿的空气环境下自燃,继而引发空气中通过老鼠洞挥发出来的甲烷体燃烧。

In this thesis, high content blast furnace slag and/or phosphorous slag ecological cement was studied. The aim is to increase additive dosage up to 70% or more, and decrease clinker dosage down to 20% or less, as well as ensure that the resulting cement must possess excellent physicomechanical properties and good durability.

本研究的目的是以矿渣和渣为代表,将目前生产的矿渣和渣水泥中的混合材掺量逐步提高到70%以上,熟料用量减少到20%以下,在确保水泥具有良好物理力学性能和耐久性能的前提下研制高掺量矿渣、渣生态水泥。

The RE of TP, COD and turbidity except NH4+-N in the aeration process by adding AS and PAM for enhanced chemical phosphorus removal increased by 7.3~59.2%, 5.0~20.3% and 10.9~34.7%, respectively. Given enough dissolved oxygen, the nitrification was not affected by adding AS and PAM in the dosage range of the study. The RE of TP, COD and turbidity by postpose coagulation were better than by simultaneous coagulation, however, coagulation and sedimentation equipments were needed in postpose coagulation process. Therefore simultaneous coagulation was more suitable for transformation of AB process for chemically enhanced phosphorus removal.

曝气过程中投加AS和PAM复配化学强化除,总、COD、浊度去除率分别提高了7.3~59.2%、5.0~20.3%、10.9~34.7%,但不能提高氨氮的去除率;在溶解氧足够时,本研究投加量范围的AS和PAM的加入对硝化作用无影响;后置混凝对TP、COD、浊度的去除效果优于同步混凝,但需增加混凝沉淀设备,因此同步混凝更适合于于AB工艺的化学强化除改造。

To the secondinstar larvae, by dropping on the pronotum and toxicant membrane, the LD50 was 0.015μg/larva and 1.41g/cm^2 at 96h after treatment, respectively. From the second instar, silkworms were fed continuously on mulberry leaves immersed of triazophos solution of different concentration, the LC50 at 24 HAT, 48 HAT, and at the beginning of the third, fourth and fifth instar was 2.38, 1.54, 0.97, 0.74 and 0.53mg/L, respectively.

结果表明,采用点滴法与药膜法,25℃条件下药剂处理后96h,三唑对家蚕2龄幼虫的接触LD50值分别为0.015μg/头与1.41μg/平方公分。2龄起蚕开始,于25℃条件下用三唑处理的桑叶饲养,在药剂处理后24、48h以及3龄起、4龄起、5龄起,三唑对家蚕的LC50值分别为2.38、1.54、0.97、0.74、0.53mg/L。

Phosphorus for corn under drought stress the impact of physiological characteristics - 05 graduates graduation session Abstract: In this experiment through the water culture method to cultivate maize seedlings will be planted corn seeds in the absence of P elements in the culture medium of Deficiency, the reprovision of a phosphorus-containing culture medium only for watering.

对于干旱逆境下玉米生理特征的影响——05届本科毕业生毕业论文摘要:本实验通过水培法来培育玉米幼苗,将玉米种子栽种在缺少元素的缺素培养液中,另配一份只含的培养液用于浇灌。

When studying the influence of high phosphorus concentration on Alkalescence Phosphorus in Chlamydomonas sajao lewin and Scenedesmus obliquus, the results show that the quantity of removing phosphorus is influenced by the quantity of Alkalescence Phosphorus.

在研究高环境对沙角衣藻、斜生栅藻碱性酸酶的影响时发现,单个藻细胞除能力的大小与碱性酸酶合成量有密切的关系,除能力随碱性酸酶合成量的增加而增大。

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