The adsorption and treatment of organic contaminants using activated carbon from waste Nigerian bamboo was investigated. Waste Nigerian bamboo was carbonized at 400 o C-500 o C and activated with acid at 800 o C to produce granular activated carbon (GAC). Adsorption of organics from the refinery waste on the activated carbon produced was examined at 28 o C. The experimental batch equilibrium data was correlated by Freundlich and Langmuir isotherms. The adsorption data fitted well into the Freundlich isotherm. Breakthrough time of about 1.5 hours was observed for the fixed bed adsorption process. The organic concentration expressed as chemical oxygen demand (COD) was reduced from an initial value of 378 mg/l to 142 mg/l for the first hour, 143 mg/l for the second hour, 152 mg/l for the third and fourth hours, and 156 mg/l for the final hour., which also compare favorably with the refinery effluent specification of 150 mg/l Results from the study shows that waste Nigerian bamboo can be converted into high capacity adsorbent and used for the remediation of polluted industrial waste waters. @ JASEM

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Access to this document was granted through an Emerald subscription provided by emerald-srm:463575 [] For AuthorsIf you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.ABSTRACT-A study has been carried out employing a vibratory motor, offering amplitudes of 0·4-4 mm at 50 Hz in acid copper sulphate as a model electrolyte in which α-Al 2 O 3 particles are suspended for co-deposition, yielding a composite electrodeposit. Using a horizontal disc vibrator at the bottom of the container, perforated discs have been shown to give superior agitation and a laminar/turbulent transition has been identified. Incorporation of particles is a maximum at the transition. In the laminar regime Sh~Re 0·037 and in the turbulent regime Sh~Re 0·82 .Mass transport enhancement was measured for a variety of disc and tank diameters and enhancement factors for electrodeposition of 3-40 times were obtained. In these circumstances a modified Reynolds number Re 1 was employed Re 1 = 100 ad 2 (d 1 -d 2 )/υd 2 and, assuming a conventional dependence upon Sc, a full correlation of the type Sh 1 = constant Re 1 a Sc 0·33 was obtained where the constant took values of 10-40 and 'a' took values of 0·83-1·1 depending upon precise location within the tank of the mass transfer probe.

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