摘要
以CaCl2为沉淀剂,加入适量FeCl3作絮凝剂,对钽铌厂矿石分解工序含氟量为1596mg/L的碱性废水进行除氟试验.研究了Ca2+/F-摩尔比、絮凝剂种类、絮凝剂用量、废水pH值、混凝搅拌时间等因素对水中残氟量的影响.结果表明:按Ca2+/F-摩尔比为3加入CaCl2,按30mg/L加入FeCl3,混凝搅拌5min,静置1h后,废水含氟量可降至8.1mg/L,达到国家污水综合排放标准中的一级标准.
This paper presents a treatment study of some fluoride wastewater from the ore decomposition process of a tantalum and niobium plant, with Fconcentration being 1 596 mg/L. The treatment was conducted by using CaCl2 as precipitant and suitable FeCl3 as coagulant. We analyzed the influence of mol (Ca2+)/mol (F), the kinds of coagulant, the dosages of coagulant, the pH value of wastewater and the time of stirring upon the remains of Fconcentration in the wastewater. The treatment results show that by adding CaCl2 up to mol(Ca2+)/mol(F)=3, adding FeCl3 up to 30 mg/L, stirring 5 min and keeping the wastewater static for 1 h, its Fconcentration drops to 8.1 mg/L, which meets the criterion of Class I of the National Standard for wastewater discharge.
出处
《中南林学院学报》
CSCD
2003年第2期98-100,共3页
Journal of Central South Forestry University
基金
中南林学院青年科学基金项目.项目代号[第0422号].
关键词
钽铌厂废水
矿石分解工序
含氟废水
废水处理
沉淀剂
絮凝剂
残氟量
mineral wastewater
precipitant
coagulant
CaCl_2
FeCl_3
F-containing wastewater
remains of F-concentration
