本文關(guān)鍵詞：硫鐵礦燒渣制復(fù)合聚鐵混凝劑及其性能研究　出處：《化學(xué)研究與應(yīng)用》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 硫鐵礦燒渣 PFS PPFS 紅外光譜分析

【摘要】：以硫鐵礦燒渣為原料,經(jīng)還原、焙燒、酸浸得到較高濃度的硫酸亞鐵溶液,以濃HNO_3為催化劑,通入氧氣將酸浸液制成深棕紅色粘稠混凝劑PFS,確定最佳反應(yīng)條件:nH_2SO_4/nFe為0.2~0.35,催化劑投加量1.75%,通入氧氣80℃反應(yīng)2h。加入Na_2HPO_4,水浴加熱制得復(fù)合混凝劑PPFS,最佳反應(yīng)條件:nPO_4~(3-)/n Fe為0.3,反應(yīng)溫度70℃~80℃,反應(yīng)時間1h。紅外光譜分析顯示,PFS、PPFS是以羥基連接為主的聚合物,將P引入PFS,PO_4~(3-)參與聚合,生成了高電荷高羥基多核絡(luò)合物,形成多種結(jié)構(gòu)單元,混凝時形成的絮體更大,對制藥廢水濁度、COD去除效果更好。
[Abstract]:High concentration of ferrous sulfate solution was obtained from pyrite cinder by reduction, roasting and acid leaching. A deep brown red viscous coagulant PFS was prepared by oxygen transfer with concentrated HNO_3 as catalyst. The optimum reaction conditions were determined as follows: 1: nH2SO-1 / 4 / NFE = 0.2N 0.35, the amount of catalyst added was 1.75, and the reaction was carried out at 80 鈩，

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