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Study on flocculation and distribution aluminum form of composite flocculant APAC

Xia Deqiang1 Suo Longning1 Tang Yingying2 Guo Quan3 Wang Bin4 Gan Liming1 Gao Lanling1(1.Lanzhou Petrochemical College of Vocational Technology,Lanzhou 730060,China; 2.The Great Wall of China Petroleum Drilling Engineering Company Limited Geological Institute,Panjin 124010,China; 3.Bengbu Institute of Glass Eng.Design and Research,Bengbu 233018,China; 4.Environmental Protection Agency of Bozhou,Bozhou 236800,China)  
A novel environmental flocculant was prepared in the process of accession to polyaluminum chloride by a low-speed alkaline titrimetry with HCl modified attapulgite as the main raw material.The species distribution of aluminium of APAC are analyzed by Al-Ferron complexation timed spectrophotometric method,and the coagulation performance of APAC is also characterized by jar tests.The results show that Ala decreases gradually with the rising of the basicity,while Alb increases with the increase of the basicity,and Alc goes up with the rising of basicity at first,but after reaching the maximum value,it decreases with rising of the basicity.With the same dosage,the higher the basicity of APAC is,the better the coagulation effect is.But it is not a fixed rule that the higher Alb concentration is,the better the coagulation effect is.Therefore the aim of quality control of APAC production is not to seek for the maximization of the Alb concentration,but to increase the basicity or Alc of the products as high as possible.
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