【作者】 高桂青；

【导师】 詹健；

【作者基本信息】 南昌大学 ， 水利水电工程， 2005， 硕士

【摘要】 随着水源污染的日益加重,传统的水处理工艺难以达到国家饮用水的卫生规范,开发新的水处理技术势在必行。在载体滤料表面涂上一层铁的氧化物或氢氧化物,将改善原滤料表面性质,提高其去除有机物等杂质的目的。 本试验是以萍乡某滤料厂生产的陶粒为载体,以氯化铁为改性剂,采用高温制备法进行改性陶粒的制备。对改性条件:改性剂的浓度、焙烧温度、焙烧时间和pH值进行了确定,通过正交试验得出在未加氢氧化钠,氯化铁浓度为2mol/L,焙烧温度为650℃,焙烧时间为3h所制备的改性陶粒对有机物的去除率最高。 改性后陶粒的比表面积是原陶粒的2.06倍;等电点的pH值大于7。 静态吸附试验表明,改性陶粒对有机物的吸附容量比原陶粒、石英砂大,属于Langmuir吸附类型;对氨氮的去除效果不如两者。 用模型滤柱进行过滤试验表明,改性陶粒的过滤周期要比原陶粒、石英砂均长;水头损失增长率比两者小;周期产水量及截留杂质量比两者均大。 在略酸性条件下对有机物的去除效果最佳;低进水浓度下,对有机物的平均去除率高;滤速越低,有机物与滤床接触时间越长,去除效果越好。更多还原

【Abstract】 Alongside the sources of drinking water are polluted increasingly, traditional water treatment technology can hardly reach the national hygiene standard of drinking water,so it is necessary to develop new water treatment technology.Coating of iron-oxide can improve the surface characters of original filter media,and will then ehance the ability of filter media to remove contaminent such as organic matter.This experiment uses a kind of ceramsite which is produced by a filter material factory of Pingxiang as the carrier,choosing FeCl₃ as the modifying agent,we assume the way of high-temperature preparation to modify ceramisite preparation. After confirming modifying conditions, density of modifying agent, roasting temperature, roasting time and pH value, we discover a kind of ceramsite to reach the highest removing rate of organic matter, which contains FeCl₃ with the density of 2mol/L, roasting temperature at 650 centigrade, roasting time of 3 hours as well as without sodium hydroxide.Surface area after modified is 2.06 times as large as that of plain ceramisite;pH value at zero point of charge on oxide is higer than 7.Static absorbing experiment shows that the absorbing capacity of organic matter by modified ceramsite is larger than unmodified ceramsite and quartz,the adsorbing of organic matter agree with Langmuir model;but the effect of removing ammonia-nitrogen is less.Filter experiment with model filter pillar indicates that the filter period of modified ceramsite is longer than unmodified ceramsite and quartz, while the increasing rate of water head loss is smaller, morever,the water productivity within a period and the capacity of retaining impurities are higher than the later ones.The effect of removing organic matter with the slightly acid condition is best. With low density of intaking water, the average rate of removing organic matter reaches high. With the slower filter speed , the time that organic matter touches the filter bed longer, the removing effect is better.更多还原