Enhancement Of Defluoridation Efficiency Of Bone Char Using Surface Modification And Sequential Application With Bamboo Char

Abstract

For This Study, Ground Water Source From Five Selected Boreholes Around Adama Were Chosen And Their Chemical Properties Were Characterized. The Average Of The Five Selected BoreholesWater Sample Was Taken To Prepare Synthetic Fluoride Ion. In This Study, Low Cost Bone And Bamboo Were Used As An Adsorbent, In Which The Bone Char Was Calcined At Temperatures Of {300, 450, 600, 750 And 900oC} And Bamboo Char Was Carbonized At Temperature Of {350, 400, 500 And 600 OC} In Muffle Furnace Parameters Like Resident Time, Calcination Temperature And Activation Chemical Were Considered In Case Of Bamboo To Prepare The Adsorbent. Parameter On The Adsorption Test For Fluoride Removal Capacity Like Contact Time, Adsorbent Dosage And Particle Size For Each Adsorbent Was Investigated. The Adsorption Test Was Compared With That Of Modjo Defluoridation Center. The Experiments Were Conducted At Conditions Of Adsorbent Dosage 0.5, 1,1.5 And 2 G, Particle Size Of {355-500, 500-700, 700-1000 And 1000-2000micrometer} And Contact Time Of {30, 60, 90 And 120 Min}. The Adsorption Was Rapid At Initial Time. The Adsorption Efficiency Was Obtained At Adsorbent Dose Of 2 G, Particle Size Of 355-500??M And 2hr Contact Time. For This Research, The Comparison Of Fluoride Removal Efficiency On Bone Char (11.01 Mg/L) And Bamboo Char (8.26 Mg/L) Was Removed And Effects Of Different Adsorbent Preparation And Adsorption Operation Parameters Were Tested On Both Adsorbent Bases. Moreover, An Alternative Modification Was Done On Bone Char To Enhance Its Property By Coating The Bone Char With Aluminum Hydroxide And Its Adsorption Capacity (11.64 Mg/L) Was Removed. The Removal Efficiency Of A Grey (3.61 Mg/L) And White Bone Char (7.51 Mg/L) As Well As Hydroxyapatite (10.22 Mg/L) Was Compared With Synthesized Adsorbent. The Morphology, Crystalline Phase And Functional Group Synthesized Adsorbent Was Further Characterized Using Sem, Xrd And Ftir. Kinetic Studies Revealed That Fluoride Adsorption Fitted Well To Pseudo Second-Order Model For All Adsorbent.