Clean Water and Sanitation (SDG 6), Climate Action (SDG 13)
Removal of heavy metals from paint wastewater using natural rubber- termite mound blend: column and batch extraction experiment Abiodun Mosaku 1 , Akinola Akinlabi 1 , Olatunbosun Sojinu 1 , Mabinuola Arifalo 2 1 Dept. of Chemistry, Federal University of Agriculture, Abeokuta, Nigeria. 2 Bamidele Olumilua University of Education, Science and Technology, Ekiti, Nigeria. Email: abeyyology@gmail.com The discharge of large concentration of heavy metals into the environment has given rise to a longstanding health problem. Removal of Cr, Pb and Zn by natural rubber – termite mound (NR-TM) composite was investigated under a column and batch extraction system. NR-TM was prepared at 1:5 and characterized using FT-IR. Removal of heavy metals from paint effluent was determined using AAS. The FT-IR analysis of NR band at 1636 revealed the presence of -C=C of an alkene stretch, while TM, NR- TM revealed bands at 772, and 3613 cm -1 as an indicative of characteristic stretching vibration of Si-CH 3, and Si-OH respectively. Metals removal from paint effluent containing up to 0.1 mg/L of Cr, 0.105 mg/L of Pb and 0.515 mg/L were achieved using 5 g of NR-TM for column experiment and 0.5 – 2.5 g for batch experiment. 80; 67; and 49 % maximum removal of Cr, Pb, Zn by NR-TM were observed respectively for column experiment, while Cr, Zn (90; 78 %), respectively for batch experiment. The adsorption data fitted the Langmuir isotherm with R 2 of 0.936, 0.78, 0.935 for Cr, Pb and Zn respectively (column experiment) and 1, 0.928 for Cr and Zn respectively (batch experiment). NR-TM showed a potential inexpensive adsorbent for the removal of heavy metals from the effluent of paint industry. Key words: Environment, natural rubber-composite, effluent, Langmuir, heavy metals References 1. Ayanda OS, Amodu OS, Adubiaro H, Olutona GO, Ebenezer, OT, Nelana SM, Naidoo EB (2019) Effectiveness of termite hill as an economic adsorbent for the adsorption of alizarin red dye. Journal of water reuse and desalination, 83. 2. Kumar V, Dwivedi SK (2021) A review on accessible techniques for removal of hexavalent Chromium and divalent Nickel from industrial wastewater: Recent research and future outlook. Journal of Cleaner Production , 295, 126229. 3. Madaki LA, Ibrahim H, Ekwumemgbo PA, Gimba CE (2022) Modification of Termite Mound Soil Using Phosphoric Acid for Photodegradation of Methylene Blue Dye under Uv Light Irradiation. Journal of Chemical Society of Nigeria , 47(6).
P61
© The Author(s), 2025
Made with FlippingBook Learn more on our blog