Abstract
The development of low-cost adsorbent coal FA (Kosovo A) for pesticide removal is an important area of scientific research. With this study, we show the potential of adsorption of coal FA (Kosovo A) for the removal of benalaxyl and atrazine from water. We have found that the amount of adsorbed benalaxyl and atrazine increases with an increasing amount of coal FA (Kosovo A) in solution. The maximum capacity coal FA (Kosovo A) to adsorb benalaxyl and atrazine was found to be 0.46 and 0.45 mg/g according to the Freundlich equation and 3.48 and 3.33 mg/g according to the Langmuir equation. The Freundlich adsorption equation better explains the adsorption results of pesticides (benalaxyl and atrazine) in coal FA (Kosovo A), as the values of the recovery coefficient (R2) were higher in Freundlich equation than the Langmuir equation. The adsorption isotherms were of type L and show that the adsorption efficiency of the coal FA (Kosovo A) depends on the initial concentration of benalaxyl and atrazine in solution and the maximum removal of benalaxyl and atrazine was achieved at concentrations less than 10 µg/ml. This study's results are expected to have implications for the use of coal FA (Kosovo A) for the removal of pesticides from water.
Highlights
Fly ash (FA), a relatively abundant and inexpensive material, is currently being investigated as an adsorbent for the removal of various organic pollutants from wastewater [1]
We have studied the kinetics of adsorption of benalaxyl and atrazine with physical and chemical properties in Table 4, in coal FAPP (Kosovo A) in a ratio of 0.5 g : 10 ml (0.5 g of coal FAPP (Kosovo A) with 10 ml of distilled H2O), where we have obtained aqueous solution of benalaxyl and atrazine (10 g/ml) in time 10, 20, 30, 60, 120, and 360 min and 24 h
We did not notice any significant change in the adsorption of benalaxyl and atrazine from the coal FAPP (Kosovo A) after 120 min
Summary
Fly ash (FA), a relatively abundant and inexpensive material, is currently being investigated as an adsorbent for the removal of various organic pollutants from wastewater [1]. A fundamentally important characteristic of good adsorbents is their high porosity and consequent larger surface area with more specific adsorption sites. Regeneration is a very important aspect of the adsorption from economic and environmental point of view. It answers various questions and anxieties as to what would happen to the adsorbent after adsorption in order not to render the whole findings useless since such adsorbent may contain toxic adsorbates [2]. Because of its high porosity, large specific surface area, and other unique characteristics, FA can be used as a low-cost and high efficient adsorbent for the treatment of environment pollutants [3]. Due to its extensive use, long life, high geochemical mobility, and various toxic properties (LD50 1,869–3,080), it has environmental significance and needs remediation [5]
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