离子交换

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究结果表明：在pH=10，吸附时间为30 min和骨炭加入量为0.6 g/L，饮用水砷初始质量浓度为0.5 mg/L时其砷去除率可达95.2%；骨炭吸附砷的行为同时符合Langmuir和Freundlich等温吸附模型；其吸附机理可能是Ca—OH官能团结合HASO4阴离子，并产生砷酸氢钙和羟基磷灰石的共沉淀，另外还存在离子交换作用；吸附柱的饱和吸附容量为4.688 mg/g；出水砷浓度符合世界卫生组织规定饮水砷标准(0.01 mg/L)。

Isobornyl methacrylate ; Ion exchgange resin ; Methacrylic acid ; Camphene ; Kinetics

甲基丙烯酸莰醇酯；离子交换树脂；甲基丙烯酸；莰烯；反应动力学

The allergens of cashew nut were isolated and identified.

离子交换层析可初步纯化出21和11kD的过敏原蛋白。

Methods The total protein of the cashew nut was isolated by SDS-PAGE. The allergens of cashew nut were identified by Western-blotting. To purify the allergens, ion exchange chromatography was employed. Results There were ten protein bands visible on the SDS-PAGE gel.

通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳电泳分离腰果的蛋白质组份，采用免疫印迹(Western-blotting)方法鉴定过敏原，通过离子交换层析对腰果主要过敏原进行初步纯化。

Celestite samples were decomposed by both acid digestion and alkali fusion techniques.

利用酸溶法和碱熔法分解天青石样品，经过离子交换分离得到纯净的Sr，测定~(87)Sr/~(86)Sr同位素比值，实验结果表明两种样品分解方法得到的~(87)Sr/~(86)Sr同位素比值的偏差〈0。

The soil bacteria was well dispersed after the Dowex resin, sodium cholate, glassware and soils were placed into a flask and the suspension was shaken for 2h .

采用0.1%胆酸钠、钠型离子交换树脂、玻璃珠与土壤样品一起在4℃振荡2h，能够较好的分散土壤中的细菌。

To intensify the mass transfer of the process, several new methods were studied, such as using congeries particle, pulsation and electric field etc.

本文对沸石离子交换过程的强化途径如颗粒改性和外场强化等进行了研究。

To cyclohexanol as raw materials in the optimum conditions, the success of acidic ion exchange resin catalyst synthesized cyclohexene.

以环己醇为原料，在优化条件下，酸性离子交换树脂成功催化合成出环己烯。

Crystallized sulfuric salt of SAM was obtained by centrifuging the precipitant at 3000 rpm after adding six times the volume of absolute methanol to the decolorant liquid with a final step of freezing evaporation.

确定了分离纯化SAM的最优条件是：在pH值5.0时，含SAM浓度为3.0 g/L的上柱液，以6 L/h的流速，过装填D152树脂的离子交换柱(φ50 mm×1500 mm)后以去离子水和醋酸洗脱除杂，再用9 L到15 L浓度为50 mmol/L的硫酸以6 L/h的流速洗脱，可以分离得到纯度较高的SAM粗品。

Through the process of learning this chapter ,learn impurities in the water hazard on the boiler, understand the principles of sodium ion-exchange softening and water degasification, grasp the effects of continuous sewage and periodic sewage.

通过本章学习。了解水中杂质对锅炉的危害。理解钠离子交换软化和水的除气原理，掌握锅炉连续排污和定期排污的作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。