摘要
为了满足生产需要,保证含铍污水达标排放,采用一种无机高分子和有机高分子组成的混凝剂改性聚合氯化铝[Al2(OH)nCl6-n.H2O].[Fe2(OH)nCl6-nH2O].M,用于含铍污水的预处理,通过与硫酸亚铁、聚合硫酸铁的对比研究表明,改性聚合氯化铝表现出高效、矾花紧密、沉淀快、耗药量低的特点,比硫酸亚铁、聚合硫酸亚铁更好的除Be能力,可有效地去除含铍污水中的Be,并能缩短沉降时间。最佳工艺条件为:改性聚合氯化铝的投加量在25 mg.L-1左右,pH值为8.5左右,沉降时间在2 h的条件下,Be去除率可达到90%以上,为含铍污水深度处理提供了条件,同时因改性聚合氯化铝用量少(硫酸亚铁投加量为85~100 mg.L-1),产生的渣量少,工业成本比使用硫酸亚铁成本低。通过活性炭,可以看出含铍污水预处理后,增加精密过滤器装置,能去除微小的Be(OH)2颗粒;活性炭在pH值≥7时对含铍污水中铍具有吸附作用,可作为污水中微量铍的深度处理,最终确保污水经处理后达到国家排放标准。
In order to meet the production needs,guaranteed contains the acupuncture needle sewage to reach the sign to discharge,uses one kind of inorganic high polymer and the organic high polymer composition Mix coagulation Medicinal preparation the modified polymerization aluminum chloride [Al2(OH)nCl6-n·H2O]·[Fe2(OH)nCl6-nH2O]·M,uses in to contain the acupuncture needle sewage the pretreatment,through with the ferrous sulfate,the polymerization iron sulfate contrast research indicated,the modified polymerization aluminum chloride displays,the vitriol flower highly effective close,precipitates quickly,consumes the dose low characteristic,the ferrous sulfate,the polymerization ferrous sulfate is better than except the Be ability,but effectively removes contains in the acupuncture needle sewage Be,and can reduce the settling time. The best craft condition is: The modified polymerization aluminum chloride throws the increment about 25 mg·L-1,the PH value is about 8.5,the settling time under 2 h conditions,Be removing rate may achieve above 90%,was contains acupuncture needle sewage depth processing to provide the condition,simultaneously because the modified polymerization aluminum chloride amount used few(ferrous sulfate threw increment is 851 100 mg·L-1),produced dregs quantity few,the industry cost was lower than the use ferrous sulfate cost.Through the activated charcoal adsorption experiment,after may see contains the acupuncture needle sewage pretreatment,the increase precision filter installment,can remove small Be(OH)2 pellets;Activated charcoal when pH value >=7 to contains in the acupuncture needle sewage the acupuncture needle to have the adsorption,may take in sewage micro acupuncture needle depth processing,finally guarantees the sewage after processing to achieve the country discharges the standard.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2007年第S1期59-63,共5页
Chinese Journal of Rare Metals
关键词
含铍污水
吸附实验
混凝剂改性
聚合氯化铝
精密过滤
contains the acupuncture needle sewage
adsorption experiment
mix coagulation medicinal preparation
modification polymerization aluminum chloride
precise filters
