Table 2.
Identified residual organic pollutants by GC-MS in the TMS derivatized ethyl acetate extracts of pulp and paper mill effluent after secondary treatment in alkaline (pH, 8.5), acidic (pH 2), 3 days and 6 days of bacterial treatment.
| S.No | Retention Time (RT) | Identified compounds | pH 8.5 | pH 2.0 | 3 days degradation | 6 days degradation |
|---|---|---|---|---|---|---|
| 1 | 6.97 | 2-Butoxyethanol | − | − | − | + |
| 2 | 7.96 | Thymol- TMS | − | + | − | − |
| 3 | 8.17 | D-Lactic acid- DITMS | − | + | − | − |
| 4 | 8.38 | D-Lactic acid- DITMS | + | − | − | − |
| 5 | 8.75 | 2,3,6-trimethyl phenol | + | − | − | − |
| 6 | 9.08 | benzoic acid trimethylsilyl ester | − | − | + | − |
| 7 | 9.14 | Benzoic acid, Trimethylsilyl ester | − | − | − | + |
| 8 | 10.45 | citral | − | + | − | − |
| 9 | 10.53/11.78 | 2′,6′-Dihydroxyacetophenone, bis(trimethylsilyl) ether | + | + | + | − |
| 10 | 12.85 | Glycerol- tri-TMS ether | + | + | + | + |
| 11 | 13.71/13.8 | phenol-4-ethyl-2-methoxy or 4-Ethylguaiacol | − | − | + | + |
| 12 | 14.66/14.68 | 2-methoxyphenol or guaiacol | − | − | + | + |
| 13 | 15.35 | Phenol,2,6-dimethoxy or syringol | + | + | − | − |
| 14 | 15.64/15.7 | Pthalatic anhydride | + | − | − | − |
| 15 | 17.02 | phenol-2-methoxy-4-(1-propenyl or isoeugenol) | − | + | − | − |
| 16 | 18.51 | 9-decenoic acid, trimethylsilyl ester | + | + | + | − |
| 17 | 19.89/19.92 | Benzyldehyde,4-(acetyloxy)-3-methoxy or acetylvanillin | + | − | − | − |
| 18 | 20.19/20.17 | Octadecanoic acid, trimethylsilyl ester or stearic acid | − | + | − | − |
| 19 | 21.74 | 1,2-benzenedicarboxylic acid,bis(2-ethylhexyl)ester | + | − | − | + |
| 20 | 22.87 | Acetic acid [(trimethylsilyl)oxy]trimethyle ester | − | − | + | − |
| 21 | 24.38/24.50 | Methoxy cinnamic acid | + | − | − | − |
| 22 | 24.40 | 9,12 octadecadienoic acid,(2-phenyl 1,3 dioxolan-4-yl)methyl ester trans | − | + | − | − |
| 23 | 24.87 | n-pentadecanoic acid,trimethylsilyl ester | − | − | + | − |
| 24 | 26.75 | 9,12-octadecadienoic acid,(2-phenyl-1,3-dioxolan-4-yl]methyl ester cis | + | + | − | − |
| 25 | 27.81 | 2,6-bis[trimethylsilyl]-3,4-dimethylphosphinine | − | − | + | − |
| 26 | 27.99 | Hexadecanoic acid,trimethylsilyl ester (Palmitic acid) | − | − | + | + |
| 27 | 28.97/28.98 | Pentadecane | + | + | − | − |
| 28 | 30.88 | Octadecanoic acid,trimethylsilyl ester | + | + | + | − |
| 29 | 31.13/32.15 | Cinnamic acid-α-phenyl-trimethylsilyl ester | − | − | + | + |
| 30 | 32.43 | Cis,13-docosenoic acid,trimethylsilyl ester | + | − | − | − |
| 31 | 33.26 | 9-[2,6-diethylphenyl]2,8-dimethyl-9-h-purin-6-amine | − | − | + | − |
| 32 | 33.63 | 2-Monopalmitin TMS ether | + | + | − | + |
| 33 | 33.91 | 1- Monopalmitin-DITMS | + | + | − | − |
| 34 | 34.88 | 1,2,diphenyl-s (t-butyl) acephenanthrylene | − | − | + | − |
| 35 | 35.52/35.5 | 1-Monostearin − DITMS/Cyclotetracosane | + | + | − | − |
| 36 | 36.06 | Octacosane | − | − | + | |
| 37 | 36.47 | Squalene/2,6,10,14,18,22-tetracosahexane,2,6,10,15,19,23-heaxamethyl-[all-E] | − | − | + | − |
| 38 | 37.43 | 5,8-dimethoxy-6-methyl-2,4-bis(phenylmethyl)naphthalen-1-ol | − | − | + | + |
| 39 | 39.16 | 1,2-benzendicarboxylic acid disononyl ester | − | − | + | − |
| 40 | 40.68 | Nonacosanol | − | − | + | − |