NGHIÊN CỨU BIẾN TÍNH BENTONIT VÀ ỨNG DỤNG HẤP PHỤ XỬ LÝ Cu2+, Pb2+ TRONG NƯỚC THẢI

Tóm tắt

We studied the modified of adsorbent material from Co Dinh bentonite by chemical agent (dithizon) after calcination at 500oC, investigated the adsorption conditions by the static method with Cu2+, Pb2+ on the material said, adsorption medium at pH = 5, the equilibrium setting time is 120 minutes, the amount of material 0.5 – 1.0 gram, investigate the effect of metal ion concentration and application of isothermal equations langmuir determined capacity of post-modified material (BTD) with Cu2+ = 24.51 mg/g and Pb2+ = 25.32 mg/g, material un-modified (BTN) as Cu2+ = 19.88 mg/g and Pb2+ = 21.32 mg/g, and applied in the adsorption and handling of dummy samples for treatment efficiency of over 96% with high reliability (CV%<5%), water sample treatment around apatite ore mining area reaches the level allowed under QCVN 40: 2011 / BTNMT