The utilization of t hree novel and distinct agricultural waste materials, namely c asuarina fruit powder CFP s orghum stem powder SSP ) and b anan a stem powder ( as low cost adsorbents for reducing chemical oxygen demand ( COD levels of coffee industry waste water has been examined. Prepared adsorbents were characteriz ed by scanning electron microscopy ( SEM), Energy dispersive x ray spectros copic ( and Fourier Transform Infrared Spectroscopy The effects of parameters like adsorbent dose, pH, temperature agitation rate and time of adsorption on the reduction of COD levels were analyzed for each adsorbent individually and the efficiency order is CFP>SSP>BSP. Based on the extent of compatibility to Freundlich/ Langmuir adsorption isotherm and different models ( pseudo first order and second order , Boyd, Weber’s and Elovich), simultaneous occurrence of chemis orption and physi sorption was proposed. Based on the observations, it is proposed that three kinetic stages involve in adsorption process viz., diffusion of sorbate to sor bent, intra particle d iffusion and then establishment of equilibrium. As these three adsorbents exhibit adsorption capacity more than 80%, the adsorbents prepared from agricultural wastes have promising role towards reduction of COD from industrial waste water to contribute envi ronmental protection .
Comments: 10 Pages. OK
[v1] 2019-05-19 05:16:03
Unique-IP document downloads: 0 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.