ph ph ph Langmuir mg /g Al 2 O 3 ph 7. 0 ~ 9. 0 ph HCO - 3 CO 2-3 PO mg /L 5 p

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1 ph ph ph Langmuir mg /g Al 2 O 3 ph 7. 0 ~ 9. 0 ph HCO mg /L 5 ph doi /j. cnki. wrahe TV TU A Study on preparation of amorphous aluminum hydroxide adsorbent and its fluoride removal performance LI Lianxiang 1 2 LIU Wenchao 1 2 SUN Ruigang 3 LI Tieguang China Irrigation and Drainage Development Center Beijing China 2. Rural Drinking Water Safety Center of the Ministry of Water Resources Beijing China 3. The Office of the SNWDP Construction Commission in Beijing City Beijing China Abstract The defluoridation measure has an important significance for the safety of the resident drinking water. The technique of fluoride removal with adsorption method is widely used but it has the difficulty to be adaptable to the partial acid environment. By taking enhancing the adaptability of the ph value of high-fluorine groundwater as the objective the amorphous aluminum hydroxide adsorption materials are prepared through controlling the ph value during the reaction process the adsorption isotherm adsorption kinetics ph adaptability competing ion reusable performance and adsorption mechanism of amorphous aluminum hydroxide adsorbent are tested. The result shows that the adsorption of fluoride ion from the amorphous aluminum hydroxide belongs to the favorable adsorption and the maximum adsorption capacity of Langmuir is mg /g. Compared with the conventional adsorption materials of Al 2 O 3 the amorphous aluminum hydroxide adsorption materials can slow down the lowering rate of the fluoride removal effect and then the adaptability of ph value can be enhanced. The fluoride removal rate is decreased along with the increases of the ion concentrations of HCO - 3 CO 2-3 PO 3-4 etc. in the solution. When the initial fluoride concentration ZX E - mail Lianxiang. 0810@ 163. com W ater Resources and Hydropower Engineering V ol. 48 No. 3 93

2 is mg /L the amorphous aluminum hydroxide adsorbent can be reused for five cycles. Therefore the improvement of the preparing process of the aluminum adsorption material can significantly enhance the adsorption performance and the adaptability of high-fluorine groundwater which is an important tendency for the development and improvement of the adsorption materials concerned. Keywords amorphous aluminum hydroxide ph value fluoride concentration adsorption fluoride removal rate high-fluorine groundwater drinking water safety 0 H W FA SHA - C JEOL Al 2 SO H 2 O NaOH 55g Al 2 SO H 2 O 100 ml 3 - ph g /L NaOH 300 ml 180 rpm NaOH ph Al 2 SO H 2 O 6-7 ph ph 5. 0 ± 0. 2 ph 180 rpm 12 h 12 h Al 2 SO H 2 O NaOH ph ph ph 6. 3 ± NaF NaCl NaH 2 PO 4 NaNO 3 Al 2 SO H 2 O NaH- CO 3 Na 2 CO 3 Na 2 SO 4 NaOH HCl 36% C 2 H 5 OH S22-2 DHG A 6 h 1 mg SEM mg /L HCl NaOH ph 7. 0 ± g /L r /min 24 h Q 8 e 1. 2 Q e = W e W = V C s - C e 1 W HI DR890 Q e mg /g W e 7500 mg W g V 90-1 L C s mg /L C e mg /L 94

3 Langmuir 150 rpm 24 h 8 Freundlich C e = C e Q e Q m Q m K L lnq e = 1 n lnc e + lnk 3 K L Langmuir L /mg C e mg /L Q e mg /g Q m mg /g k Freundlich n mg /L ph 7. 0 ± g /L rpm h ph mg /L g 1. 5 GB /T HI98107 t = t 4 Q t k 2 Q 2 Q e e mg /g Q t t Q e mg /g k 2 min - 1 F - g / mg ph 2. 1 ph SEM mg /L HCl NaOH ph 3. 0 ± ± ± ± ± ± ± ± ± g /L rpm 24 h 2. 2 = C s - C e 100% 5 C s C s mg /L C e mg /L mg /L Cl - NO HCO - 3 PO mmol /L NaCl NaNO 3 Na 2 SO 4 NaHCO 3 Na 2 CO 3 NaH 2 PO g /L rpm 24 h mg /L mg /L ph 7. 0 ± g /L 25 1% NaOH 6 h 5 ~ 6 ph Palintest 7500 Langmuir Freundlich Langmuir 4 DR890 1 ~ 2 μm 1 1 Freundlich K L /L mg - 1 Q m /mg g - 1 R 2 n k R

4 1 1 ph 3 Langmuir Freundlich ph 7. 0 ± 0. 1 Langmuir mg /g Freundlich n n ph 2 Al 2 O 3 ph 2 ph Al 2 O mg /g 60 min 3 a ph 6. 0 ph mg /L mg /L ph 5. 0 ~ % mg /L ph ph b 3 b mg /L Al 2 O ph 6. 0 ph 2. 4 ph ph ph 96

Al 2 O 3 ph 7. 0 ~ 9. 0 Al 2 O 3 ph 7. 0 ~ 9. 0 ph 2. 5 Cl - NO - 3 4 HCO - 3 CO 2-3 PO 3-4 4 5 59. 5% 5 20% 5 12 2. 7 1. 40 2. 00 2. 67 3. 73 4.

5 Al 2 O 3 ph 7. 0 ~ 9. 0 Al 2 O 3 ph 7. 0 ~ 9. 0 ph 2. 5 Cl - NO HCO - 3 CO 2-3 PO % 5 20% mg /L Cl - NO Cl mmol /L HCO - CO 2-4 HCO CO mmol /L F - 40% mg /L 5 79% % 5 30% mg /L mg /L 6 a ~ mg /L 74. 4% 2 97

20. 00 ~ 50. 00 mg /L ph 4 2. 00 mg /L ph 4 50. 00 mg /L 4 25. 00 mg /L F - Al 2 SO 4 3 F - of fluoride ions adsorption on CeO 2 /Al 2 O 3 with non-thermal plasma J Al OH Al F Al SO 4 168 2 665-671.

6 ~ mg /L ph mg /L ph mg /L mg /L F - Al 2 SO 4 3 F - of fluoride ions adsorption on CeO 2 /Al 2 O 3 with non-thermal plasma J Al OH Al F Al SO Al 2F ~ mg /L ph 6 b 4 ph ph D ph 6. 0 ph Al OH Al F 4 Al SO 4 Al 2F 4 Al OH Al F GONG 6 3 ph double hydroxides J Langmuir mg /g Al 2 O 3 ph 7. 0 ~ 9. 0 ph HCO mg /L 5 Al OH Al F Al SO 4 Al 2F 4 1 ZHANG T LI Q LIU Y et al. Equilibrium and kinetics studies composites pretreated. Chemical engineering journal WANG J XU W CHEN L et al. Excellent fluoride removal performance by CeO 2 -ZrO 2 nanocages in water environment J. Chemical engineering journal J D GONG W X QU J H LIU R P et al. Adsorption of fluoride onto different types of aluminas J. Chemical engineering journal DU X WANG Y SU X et al. Influences of ph value on the microstructure and phase transformation of aluminum hydroxide J. Powder technology M GB /T S D CAI P ZHENG H WANG C et al. Competitive adsorption characteristics of fluoride and phosphate on calcined Mg-Al-CO 3 layered. Journal of hazardous materials C / /

标题

第 33 卷第 2 期 Vol. 33 No. 2 水摇利摇经摇济 Journal of Economics of Water Resources 2015 年 3 月 Mar. 2015 DOI:10. 3880 / j. issn. 1003 9511. 2015. 02. 014 全生命周期视角下烟草水源工程造价监控管理刘摇波, 付生