| 摘要 |
<p>High adsorbency, granular iron oxides and / or hydroxides with good abrasion resistance are characterised by low residual turbidity from aqueous suspensions i.e. less than 600 FNU, and preferably less than 200 FNU. The materials may be reinforced with Al, Mg, or Ti oxides / (oxy)hydroxides. Preferred particle size is 0.1-1 mm with BET specific area of the order of 250 square metre per gram. An independent claim is included for the use of granules as loose bulk material, or enclosed in cartridges for removal of pollutants e.g. phosphates, cyanides and compounds of antimony, beryllium, selenium, tellurium, sulphur and arsenic from water, liquid effluent, or gases.</p> |
