Precipitate flotation of fluoride-containing wastewater from a semiconductor manufacturer

被引：203

作者：

Huang, CJ ^{[1
]}

Liu, JC ^{[1
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Sect 4, Taipei 10672, Taiwan

来源：

WATER RESEARCH | 1999年 / 33卷 / 16期

关键词：

calcium fluoride; flotation; fluoride; fluorite; pH; precipitate; semiconductor; wastewater;

D O I：

10.1016/S0043-1354(99)00065-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Precipitate-flotation of fluoride-containing wastewater from a semiconductor manufacturer was investigated. The process involves the addition of calcium chloride to generate precipitate and the subsequent removal of calcium fluoride (CaF2). Results from dispersed air flotation (DiAF) experiments indicate that through the adjustment of molar ratio of calcium and fluoride ([Ca2+]/[F-]) and pH values, the residual fluoride concentration of lower than 10 mg/L in the effluent could be obtained. The concentration of sodium dodecyl sulfate (SDS) significantly affected the removal efficiency of CaF2. Flotation reaction was not affected by pH. Flotation efficiency decreased with increasing ionic strength and in the presence of sulfate. However, the depressed flotation could be improved by increasing SDS concentration. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：3403 / 3412

页数：10

共 28 条

[1] FLUORINE POLLUTION IN THE MARMARA REGION, TURKEY - PRODUCTION METHODS FOR FLUORINE REMOVAL AND RECOVERY [J].

ALTINTAS, N ;

AYOK, T ;

GOZMEN, T .

WATER RESEARCH, 1987, 21 (07) :781-788

[2]

APHA AWWA WPCF, 1985, STAND METH EX WAT WA, P96

[3]

CHOU SS, 1994, P 19 WAST TREATM TEC, P310

[4] ADSORPTION CHARACTERISTICS OF FLUORIDE ONTO HYDROUS ALUMINA [J].

HAO, OJ ;

HUANG, CP .

JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 1986, 112 (06) :1054-1069

[5] The effect of dissolved species on hydrophobic aggregation of fluorite [J].

Hicyilmaz, C ;

Bilgen, S ;

Ozbas, KE .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1997, 121 (01) :15-21

[6] ADSORBING COLLOID FLOTATION OF HEAVY-METAL IONS FROM AQUEOUS-SOLUTIONS AT LARGE IONIC-STRENGTH [J].

HUANG, SD ;

HO, H ;

LI, YM ;

LIN, CS .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1995, 29 (07) :1802-1807

[7]

KATO Y, 1993, FIRST INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES, P109

[8] RECOVERY OF CO(2+) IONS FROM AQUEOUS-SOLUTIONS BY FROTH FLOTATION [J].

KOUTLEMANI, MM ;

MAVROS, P ;

ZOUBOULIS, AI ;

MATIS, KA .

SEPARATION SCIENCE AND TECHNOLOGY, 1994, 29 (07) :867-886

[9] Fluoride removal from water with spent catalyst [J].

Lai, YD ;

Liu, JC .

SEPARATION SCIENCE AND TECHNOLOGY, 1996, 31 (20) :2791-2803

[10] DISSOLVED-AIR FLOTATION OF METAL-IONS [J].

LAZARIDIS, NK ;

MATIS, KA ;

STALIDIS, GA ;

MAVROS, P .

SEPARATION SCIENCE AND TECHNOLOGY, 1992, 27 (13) :1743-1758

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