การเปรียบเทียบประสิทธิภาพในการกำจัดโลหะหนักโดยใช้เรซินแลกเปลี่ยนไอออนที่เตรียมจากต้นมันสำปะหลัง ใบสับปะรด และกาบมะพร้าว / ชัชฎาพร องอาจ = Comparision of heavy metal removal efficiency by ion exchange resin prepared from cassava tree, pineapple leaf and coconut husk / Chatchadaporn Ongard
This research investigated the comparision of heavy metal removal efficiency by ion exchange resin prepared from cassava tree, pineapple leaf and coconut husk which was both untreated and treated with hydrochloric 1 N, formaldehyde 5% and formaldehyde 37% respectively. The concentration of heavy metals studies (copper, nickel and zinc) was varied at 5,10, 20 and 50 mg/l by using batch experiment. The efficiency of heavy metal removal in synthetic wastewater indicated that the highest efficiency was ion exchange resin made from untreated coconut husk, cassava tree and pineapple leaf, respectively. The highest efficiency was ion exchange resin prepared from untreated, treated with hydrochloric, treated with formaldehyde 5% and treated with formaldehyde 37% respectively. The result indicated that chemical treatment did not enhance the removal efficiency of heavy metal. The aforementioned ion exchange resin had average efficiency of copper, nickel and zinc of 67.72%, 22.55% and 44.78% respectively. Ion exchange resin had the highest efficiency at an initial concentration 5 mg./l. When the concentration of heavy metal in wastewater was increased, the efficiency of heavy metal was decreased. This research also investigated the efficiency of heavy metal removal from industrial wastewater. The initial concentration of copper, nickel and zinc was 3.930, 4.034 and 0.567 mg/l respectively. The result indicated that untreated coconut husk had the average efficiency of copper, nickel and zinc removal at 85.80%, 65.13% and 90.43% respectively.