weight of adsorbent material g the hydrotalcite like and aurichalcite like adsorbent cu 0 33 zn 0 33 fe 0 17 al 0 17 oh 2 co 3 2 u2212 0 17 mh 2 o was prepared by dissolving 21 74 grams of cu no 3 3 3h 2 o and 26 77 grams of zn no 3 2 6h 2 o and 18 18 grams of fe no 3 3 9h 2 o and 16 88 grams of al no 3 3 9h 2 o in 400 ml distilled water to form the first solution whereas the second base solution was prepared by dissolving 17 28 grams of naoh and 19 08 grams of na 2 co 3 in 400 ml distilled water following the procedure outlined above these precursors yielded approximately 13 5 grams of adsorbent material with 0 64 g cm 3 bulk density 0 1 gram of adsorbent material was used for breakthrough test the final molar ratio of cu zn fe al was 0 33 0 33 0 17 0 17 the hydrotalcite like and aurichalcite like adsorbent cu 0 33 zn 0 33 fe 0 22 al 0 11 oh 2 co 3 2 u2212 0 17 mh 2 o was prepared by dissolving 21 74 grams of cu no 3 3 3h.