Abstract:The study investigated the effect of temperature and concentration of biogenic oil effluent (BOE) discharged into a lake in River State, Nigeria. Standard method of physicochemical characteristics was used to analyze field parameters. The results indicated that the average temperature ranged between 26.2oC to 30.4oCand effluent concentration ranged between 98.2 mg/l to 986mg/l for mixture and raw effluent. The high value of Nitrogen (N), Phosphorus (P), Potassium (K), and Magnessium(Mg) were major components of biogenic effluent. It was observed that there was algae bloom and eutrophication due to high organic load in the lake. The re-aeration constant determined from the dissolved oxygen data from the study lake varies from 0.01d-1 to 0.19d-1 with an average of 0.062d-1. The de-oxygenation constant obtained from laboratory determined from BOD5 data was 0.44d-1. The self purification factor was 0.14. The study derived two models which predicted the re-aeration constant from measured field values. The correlation coefficient of the derived models for temperature and biogenic effluent were 0.914 and 0.978 respectively. The critical dissolved oxygen and critical deficit were 2.01 mg/l and 5.19mg/l respectively. The study recommended close monitoring of effluent discharge into the lake, effluent treatment and restriction of biogenic oil effluent discharged into a saver pit to minimize pollution into the lake. Keywords:Effluent, physicochemical, biogenic, eutrophication, de-oxygenation, re-aereation, Pollution. Title:Modelling the Effects of Temperature and Biogenic Oil Effluent Concentration on Reaeration Coefficient of a Lake Author:Ugbebor, John N ISSN 2394-7349 International Journal of Novel Research in Engineering and Science Novelty Journals
Abstract:The goal of this research is to investigate the effects of dehydrating agents and preparation conditions on the physical characteristics of activated carbon produced from coconut shell as precursor material. The chemical activation process was accomplished by impregnating the raw materials with different dehydrating agents (KOH, ZnCl2), prior to heat treatment. Characterization of activated carbon was done using scanning electron microscope. Activation temperature of 450 oC and holding time of 3 hours, proved to be the optimum conditions for preparing activated carbon. Coconut shell treated with KOH displayed activated carbon of larger pore size (1.8nm ) than those treated with ZnCl2 ( 0.14nm).
Keywords:Activated carbon; Holding time, Chemical activation; Activation temperature, Pore size. Title:Effect of Preparation Conditions on the Characteristics of Activated Carbon Produced in Laboratory Author:J.O Otulana, O.O Oluwole ISSN 2394-7349 International Journal of Novel Research in Engineering and Science Novelty Journals\