Nanayakkara Uditha Sandali Dissanayake, Daham Tharanga Jayawardana, Sandani Buddhima, Hasini Mapatuna and Hisho Ravilojan

 Department of Forestry and Environmental Science, Faculty of Applied Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka.

Received: 2 Feb 2023/ Revised: 1 Mar, 2023/ Accepted: 8 Mar, 2023

(✉) Corresponding Author: sandalidisanayake@sci.sjp.ac.lk

Abstract

Recent research focuses on the effectiveness of particular laterite grain sizes of thermally modified laterite soil as an adsorptive material for getting rid of copper and chromium subatomic particles out of polluted water in lab settings. By auger drilling, the pure laterite soil was extracted from tropical weathering conditions. Collected soil samples were washed and dried by air. Soil was crumpled to create 2 mm and 0.5 mm grain sizes. By heating the laterite at 100 °C, 200 °C, 300 °C, and 400 °C for three hours in a muffle furnace, thermally activated soil was arranged. Batch studies were carried out at an ambient temperature and the natural pH was used to determine the adsorption states of copper and chromium ions for the thermally activated laterite soil. According to the findings, 2000C thermal-activated laterite soil has higher removal efficiencies. The maximum removal efficiency of copper and chromium ions was given at 90 minutes of optimal contact time for both 2 mm and 0.5 mm grain sizes. However, the optimum dosage of 0.50 g of thermally activated soil of 2 mm and 0.5 mm grain sizes was responsible for significant removal efficiency. Thus, thermal-activated laterite soil can remarkably remove copper and chromium from water at natural pH levels.

Keywords: Adsorption, Thermally modified Laterite, Copper, Chromium, Optimum conditions

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How to cite this article

Dissanayake, N. U. S., Jayawardana, D. T., Buddhima, S., Mapatuna, H. and Ravilojan, H. (2023). Thermally modified laterite soil by means of an adsorptive material for copper and chromium elimination from polluted water. Chemical and Environmental Science Archives, Vol. 3(1), 8-14. https://doi.org/10.47587/CESA.2023.3102

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