| 酸浸赤泥制备含碳聚硅酸铝铁絮凝剂及其污泥脱水性能研究 |
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| 引用本文： | 谢武明,马峡珍,李俊,周峰平,张宁,顾舸,许小丹,刘敬勇,张文治. 酸浸赤泥制备含碳聚硅酸铝铁絮凝剂及其污泥脱水性能研究[J]. 环境科学学报, 2017, 37(9): 3464-3470 |
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| 作者姓名： | 谢武明 马峡珍 李俊 周峰平 张宁 顾舸 许小丹 刘敬勇 张文治 |
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| 作者单位： | 广东工业大学环境科学与工程学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东工业大学轻工化工学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东工业大学环境科学与工程学院, 广州 510006,广东环境保护工程职业学院, 佛山 528216 |
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| 基金项目： | 广东省重大科技专项（No.2015B010110004）；广州市科技计划项目（No.2014Y2-00214）；广东省大学生创新创业训练计划项目（No.201511845031） |
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| 摘 要： | 以改性淀粉、拜尔法赤泥为原料,制备了含碳聚硅酸铝铁絮凝剂(R-CSiAFS),研究其对污泥的脱水性能,并采用红外光谱仪(FTIR)、X射线衍射仪(XRD)、扫描电镜(SEM)和热重分析仪(TGA)对R-CSiAFS复合絮凝剂进行表征.结果表明,赤泥经硫酸前处理后,总铁(TFe)和Al~(3+)的浸出率分别为81.44%和96.83%.在(Al+Fe)/淀粉质量比为0.55/1,最佳pH=3.0,SiO_2质量分数为0.375%的条件下制得最优R-CSiAFS.利用此絮凝剂进行污泥脱水实验,当投加量为330 mg·L~(-1),污泥体系pH为7.0时,污泥比阻SRF降低了92.3%,沉降比SV30从90.0%降低到79.9%.
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| 关 键 词： | 赤泥 硫酸浸取 聚硅酸铝铁 絮凝剂 污泥脱水 |
| 收稿时间： | 2016-12-14 |
| 修稿时间： | 2017-01-22 |
The preparison and sludge-dewatering properties of R-CSiAFS composite flocculant made from acid-treated red mud |
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| XIE Wuming,MA Xiazhen,LI Jun,ZHOU Fengping,ZHANG Ning,GU Ge,XU Xiaodan,LIU Jingyong and ZHANG Wenzhi. The preparison and sludge-dewatering properties of R-CSiAFS composite flocculant made from acid-treated red mud[J]. Acta Scientiae Circumstantiae, 2017, 37(9): 3464-3470 |
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| Authors: | XIE Wuming MA Xiazhen LI Jun ZHOU Fengping ZHANG Ning GU Ge XU Xiaodan LIU Jingyong ZHANG Wenzhi |
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| Affiliation: | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006,School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006 and Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216 |
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| Abstract: | R-CSiAFS flocculant combined silicon-aluminum-ferric-starch was prepared using the raw material including the modified starch and red mud produced in bayer process.The R-CSiAFS composite flocculant was characterized using FTIR, XRD, SEM, and TGA. After treated by sulfuric acid, the leaching rate of TFe and Al3+ from red mud were 81.44% and 96.83% respectively. The optimal conditions are the mass rate of Al+Fe and starch of 0.55/1,the pH of 3.0,and the SiO2 content of 0.375%.Compared with raw sludge, the sludge SRF decreased by 92.3%, the SV30 decreased from 90.0% to 79.9% when the dosages of R-CSiAFS was 330 mg·L-1under pH 7.0. |
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| Keywords: | red mud sulfuric acid extraction poly-silicate ferric aluminum coagulation dewatering |
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