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Electrochemically active carbon nanotube (CNT) filters have been developed as a highly efficient technology for water and wastewater treatment during the last few years. CNT filters have been widely used to adsorb chemical and biological contaminants due to their high stability, great flexibility, and large specific surface area. Electrochemically active CNT filters provide additional electrooxidation of the adsorbed contaminants and have been proven to be a highly effective treatment technology in a few recent lab-scale studies. The working principles, impacting factors, and some of the latest development of electrochemically active CNT filters are reviewed in this paper. The existing challenges and future perspectives are also discussed.

The phenol and monochlorophenols-degrading bacteria were isolated from the soil samples adjacent to textile, pharmaceuticals, industries and automobile workshops. Twenty seven isolates were recovered including twelve phenol, four 2-chlorophenol (2-CP) and eleven 4-chlorophenol (4-CP) degrading organisms. Among them five isolates were chosen as potential monochlorophenol-degrader; four of them were identified as species of Pseudomonas and one as Aeromonas. The biodegradability of phenol and monochlorophenol followed the order: phenol > 4-chlorophenol > 2-chlorophenol. Pseudomonas sp. AP2, Pseudomonas sp. AP3, Pseudomonas sp. AP4 and Aeromonas sp. PP3 degraded 400 and 600 ppm phenol within 48 and 72 h, and Pseudomonas sp. A4-CP2 degraded 600 and 800 ppm phenol in 48 and 72 h respectively. Pseudomonas sp. A4-CP2 also degraded 200 ppm 2-chlorophenol within 96 h and 200 and 350 ppm 4-chlorophenol within 48 and 75 h respectively. Bacterial isolates grew well in liquid culture containing 600 ppm phenol, while the growth was scanty in the medium containing 400 or 800 ppm phenol, except for Pseudomonas sp. A4CP2. The isolate Pseudomonas sp. A4CP2 also grew on 2-CP and 4-CP at concentrations of 200 and 350 ppm respectively. The correlation coefficient (at 0.01 level of significance) between bacterial growth and degradation capability of the isolates AP2, AP3, AP4, A4CP2 and PP3 were -0.835**, -0.847**, -0.700**, -0.946** and -0.401 respectively.Keywords: Biodegradation; Phenol; 2-Chlorophenol; 4-Chlorophenol; Pseudomonas; AeromonasDOI: http://dx.doi.org/10.3329/bjm.v25i1.4854 Bangladesh J Microbiol, Volume 25, Number 1, June 2008, pp 41-44

Phenol widely used in industries, are of growing concern owing to their toxicity and wide distribution in industrial wastes.  The aims of the study were to characterize some of the locally isolated bacteria and to develop suitable methods for the degradation of phenol using them. Locally isolated AP11, AP9, AP6 and AP7 were identified as Pseudomonas putida using the classical methods. Pseudomonas putida AP11 and AP9 were able to remove 600 ppm phenol completely, but Pseudomonas putida AP6 and AP7 were able to remove 400 ppm phenol completely. The maximum degradation rates for freely suspended culture of Pseudomonas putida AP11, AP9, AP6, AP7 were 10.83, 10.42, 8.33, and 8.33 (ppm/h) respectively. The isolates AP11, AP9, AP6 and AP7 can be used to wastewater containing phenol in effluent treatment systems.  Keywords: Aromatic hydrocarbon; Carbon source; Contaminated soil; Phenol; Pseudomonas.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i2.6339                J. Sci. Res. 3 (2), 367-374 (2011)