Multi-parametric filtration effect of the dyes mixture removal with the low cost materials

Abstract

In the course of this project we were able to develop a wastewater treatment method, column filtration, which turned out to be effective, affordable, and easily implementable. We tested filtration/adsorption process on a mixture of three dyes, methylene blue (MB), crystal violet (CV), and methyl orange (MO) on a column 50 cm of height and 5 cm in diameter. The column material consisted of equal amounts of walnut shells powder (WSP), corn cob powder calcined (CCPC), and pyrophyllite (PY) was proved to be more efficient. The aim of the present study was to optimize and standardize the operational and experimental parameters of the column. A number of tests were carried out to do this by changing the particle size of the adsorbent materials, the percolation debit of the filtrate and the height of the filter bed. The examination by UV-visible spectrometry shows that the removal percentage by 99% was carried out by the diameter of 120 lm predominantly with percolation debit of the filtrate of 50 mL min À1 and the height of column bed of 4.5 cm. When the materials having macroscopic porous structure with a very small grain diameter were used, of small-sized dyes into the filtering medium without being trapped. On the other hand, it is noticed that the efficiency of the adsorption by filtration increases with the increase in the height of the filter bed and decreases with the increase of both the percolation debit and particle size of the adsorbents.

A coagulation-flocculation process combined with continuous adsorption using eggshell waste materials for phenols and PAHs removal from landfill leachate

“…Recently, various low-cost adsorbents derived from agricultural waste, industrial by-products or natural materials, have been intensively investigated. Some of these materials include bottom ash [9], palm ash [10], zeolite [11], marine sand and saw dust [12,13], limestone and activated carbon [14], Walnut shells [15], and diatomaceous earth materials [16].…”

Kinetic Modeling Characterization of Cellulose Modified Surface for Methylene Blue Removal from Aqueous Media

“…Meanwhile, the graph plots of the MB adsorbed versus time were developed to show the kinetic properties of the new Cel-AT, which also yielded a pseudosecond-order model in this work (Figure 4). Miyah et al [16] have obtained a similar pattern of the graph in their work highlighting crystal violet dye removal using local clay. Moreover, approximately 1.0 mg of MB was adsorbed for each gram of Cel-AT at 1 mg L −1 of the initial MB concentration.…”

“…Where, q t is the amount of adsorbate adsorbed at time (mg g −1 ); q e is the amount adsorbed at equilibrium (mg g −1 ); K 1 is the adsorption rate constant of the pseudo-first-order model; and t is time (min). [16] Meanwhile, the pseudo-second-order reaction rate was dependent on the quantity that was adsorbed to the adsorbent surface and the amount that was adsorbed at equilibrium, which could be depicted as follows:…”

COVID-19 Impact on Public Health, Environment, Human Psychology, Global Socioeconomy, and Education

“…Impact of COVID-19 on Water Quality. Population growth and the increase in agroindustrial activities are creating increasing pressure on the planet's freshwater reserves [28,29]. Indeed, these activities generate a great diversity of pollutants that flow into the water cycle, jeopardizing the fragile natural balance that has allowed life to develop on earth [30].…”