Chemical Degradation Methods for Wastes and Pollutants - Chapter 2 pps

... H þ ! HO 2  2 2HO 2  ! H 2 O 2 þ O 2 ð3Þ H 2 O 2 þ e À ! OH  þ OH À ð4Þ H 2 O 2 þ O 2  À ! OH  þ OH À þ O 2 ð5Þ This series of chemical equations is equivalent to: O 2 þ 2H þ þ 3e À ! ... oxidation methods has been carried out for the removal of 2, 4,6-trinitrotoluene and 1,3,5-trinitrobenzene from groundwater ( 126 ). The methods used were powdered T...

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... 3760 (29 3) 0.30 (29 6) 1 02 3-Chlorophenol 1750 (27 3) 0.09 (25 4 or 29 6) 1 02 3-Chlorophenolate 3000 (29 2) 0.13 (25 4 or 29 6) 1 02 4-Chlorophenol 1650 (27 8) 0 .25 (25 4 or 29 6) 1 02 4-Chlorophenolate 24 00 ... (25 3.7) 0. 62 (25 3.7) 97 H 2 O 2 18.7 (25 3.7) 0.5 d 98,99 HO 2 À 21 0 0.5 d 98,99 NO 3 À 9900 (20 0) 100 Phenol 516 (21 3–400) 0.05 (21 3–400) 101 2- Chlorop...

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... than 2 hr, yielding inorganic products such as SO 4 2 ,PO 4 3À ,NO 3 À , and CO 2 , together with ethanol and light organic (14) (15) Sonochemical Degradation of Pollutants 22 3 TM Copyright © 20 03 ... sonochemical degradation of many other chloromethanes and chloroethanes was reported by Bhatnagar and Cheung [49]. Aqueous so- lutions of CCl 2 H 2 , CCl 3 H, CCl 4 ,...

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... Li 2 SO 4 ,Na 2 SO 4 ,K 2 SO 4 K 2 CO 3 , RbCO 3 Li 2 SiO 3 ,Na 2 SiO 3 Rb 2 SO 4 Na 3 PO 4 Na 2 SeO 4 CaF 2 , SrF 2 , BAF 2 K 2 SiO 3 SiO 2 ,Al 2 O 3 K 3 PO 4 CaCl 2 , CaBr 2 , CaI 2 BaCl 2 , ... 1670 1650 1690 1710 1650 Feed water flow rate (lb/hr) 721 703 744 70 322 622 70 Quench water flow rate (lb/hr) 22 40 22 90 20 20 1710 27 80 3 020 24 30 Kerosen...

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... reduc- tion of the peroxide: 2Fe 2 þ H 2 O 2 þ 2H þ ! 2Fe 3þ þ 2H 2 O ð10Þ with mechanistic steps of Fe 2 þ HOOH ! FeðOHÞ 2 þ HO Á Fe 2 þ HO Á ! FeðOHÞ 2 ð11Þ FeðOHÞ 2 þ H þ ! Fe 3þ þ H 2 O ... Fe 3+ -catalyzed decom- position of hydrogen peroxide. These react ions include [3]: Fe 3þ þ H 2 O 2 ! Fe 2 þ H þ þHO 2 Á Fe 2 þH 2 O 2 ! Fe 3þ þHO Á þ OH À H 2 O 2...

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... reactions: C 6 H 5 NH 2 þ 2H 2 O ! C 6 H 4 O 2 þ 3H þ þ 4e À þ NH 4 þ ð19Þ C 6 H 4 O 2 þ 6H 2 O ! C 4 H 4 O 4 þ 2CO 2 þ 12H þ þ 12e À 20 Þ C 4 H 4 O 4 þ 4H 2 O ! 4CO 2 þ 12H þ þ 12e À 21 Þ The treatment of 400 mL ... reaction (2) , but it is assumed to be mediated by NH 4 + via an NH 4 0 adsorbed intermediate: 2NH 4 þ þ 2e À ! 2NH 4 0 26 Þ 2NH 4 0 þ Cl 2 FC À CF 2 Cl !...

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... 2 COClÀCCl 2 O . ð67Þ COClÀCCl 2 O . ! . COCl þ CCl 2 O ð68Þ CCl 2 O þ H 2 O ! CO 2 þ 2Cl À ð69Þ . COCl þ H 2 O ! . COO À þ 2H þ þ Cl À ð70Þ . COO À þ O 2 ! . O À 2 þ CO 2 ð71Þ 2 COClÀC . Cl 2 !COClÀC 2 Cl 4 ÀCOCl ð 72 ! HOOCÀC 2 Cl 4 ÀCOOH ... proposed: CCl 2 ÀÀ ÀÀCCl 2 þ . OH ! HOCCl 2 ÀC . Cl 2 ð64Þ HOCCl 2 ÀC . Cl 2 ! COClÀ . CCl 2 þ H þ þ Cl À...

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... (%) CFC-11 CCl 3 F 99.99 CFC- 12 CCl 2 F 2 99.99 HCFC -2 2 CHCIF 2 99.99 HFC- 32 CH 2 F 2 99.99 CFC-113 CCl 2 FCCIF 2 99.99 CFC-114 CClF 2 CClF 2 99.99 CFC-115 CClF 2 CF 3 99.99 HFC-134a CH 2 FCF 3 99.99 HFC-152a ... CH 2 FCF 3 99.99 HFC-152a CH 3 CHF 2 99.99 R-500 CFC- 12+ HFC-152a 99.99 R-5 02 CFC-115+HCFC -2 2 99.99 Halon 121 1 CBrClF 2 99.99 Halon 1301 CBrF...

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... [22 4] Cyclodextrins Solubilizes organics, prevents settling [22 5 ,22 6] Electroenhanced Faster reduction [22 7 23 2] Fenton (Fe 0 /H 2 O 2 ) Oxidative degradation [23 3 23 9] Vapor phase PCBs [93 ,24 0 ,24 1] High ... Inc. All Rights Reserved. Fe 0 þ 2H 2 O ! Fe 2 þ H 2 þ 2OH À ð14Þ 2Fe 0 þ O 2 þ 2H 2 O ! 2Fe 2 þ 4OH À ð15Þ The presence of a reducible contaminant in an Fe...

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... investigate the effect of cellulolytic enzymes on MSW degradation [73]. Econase consists mainly of endo-1,4-h- D-glucanase, cell obiohydrolase, and exo-1,4-h-D-glucosidase in addition to a number of other ... suitable for the treatment of waters contaminated with a variety of phenols and anilines including at least six USEPA priority pollutants (phenol, 2- chlorophenol, 2, 4-dichlo...

Ngày tải lên: 11/08/2014, 13:21