CN111482162B - 一种基于改性硅藻土的净水剂及其制备方法 - Google Patents
一种基于改性硅藻土的净水剂及其制备方法 Download PDFInfo
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Abstract
本发明涉及净水剂技术领域,尤其是一种基于改性硅藻土的净水剂及其制备方法。该基于改性硅藻土的净水剂主要由如下重量份数的原料组成:改性硅藻土30‑45份、铝盐10‑18份、磷酸三钠5‑12份和醋酸纤维5‑15份。本发明对硅藻土进行预处理和活化表面处理,扩大硅藻土孔隙率,提高其吸附污染物的能力,改性硅藻土与铝盐按照优化后的计量配合使用,提高反应活性和持久性;磷酸三钠和醋酸纤维在高温下均匀溶解并分散在改性硅藻土和铝盐体系中,磷酸三钠软化废水中污染物,促使改性硅藻土和铝盐的净化作用稳定进行,醋酸纤维包覆污染物外壁,污染物被改性硅藻土吸附后,使得硅藻土在吸附较多杂质时仍能够重复利用,减轻硅藻土清洁难度。
Description
技术领域
本发明涉及净水剂技术领域,尤其是一种基于改性硅藻土的净水剂及其制备方法。
背景技术
目前,随着我国工业化进程的快速推进,环境污染尤其是水资源污染日益严重,严重影响着人们的身体健康和生存环境。净水剂就是投放入水中能和水中其它杂质产生反应的药剂,主要是起到净水的目的。采用净水剂对工业废水和城市污水进行混凝处理,是水处理中最常用的方法之一,也是消除污染、保护环境的重要手段。
硅藻土是由硅藻及其它微生物的硅质遗骸组成的生物硅质岩,具有大量的、有序排列的微孔,从而使硅藻土具有很大的比表面积,同时,硅藻土化学稳定性高,除溶于氢氟酸外,不溶于任何强酸,易溶于碱,无二次污染。
天然硅藻土颗粒主要将杂质吸附到硅藻土颗粒的空隙中来达到去除杂质的作用,但过多的杂质吸附到硅藻土颗粒的空隙中会减少硅藻土颗粒的重复利用率,也加大硅藻土颗粒的清洁难度。因此,如何提供一种基于改性硅藻土的净水剂及其制备方法,扩大硅藻土孔隙率,使得硅藻土在吸附较多杂质时仍能够重复利用,减轻硅藻土清洁难度,是本领域技术人员亟待解决的技术问题。
发明内容
本发明的目的在于提供一种基于改性硅藻土的净水剂及其制备方法,克服前述现有技术的诸多不足,对硅藻土进行改性,基于改性后的硅藻土制备净水剂,扩大硅藻土孔隙率,使得硅藻土在吸附较多杂质时仍能够重复利用,减轻硅藻土清洁难度。
本发明解决其技术问题所采取的技术方案是:
一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土30-45份、铝盐10-18份、磷酸三钠5-12份和醋酸纤维5-15份。
优选的,一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土42份、铝盐15份、磷酸三钠9份和醋酸纤维10份。
优选的,所述改性硅藻土包括如下步骤:
(1)将硅藻土完全浸没在50-60℃包含有环糊精和氢氧化钠溶液中20-30分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至40-50℃保温20-30分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在50-55℃下加热40-60min分钟,将硅藻土滤出在40-50℃下使用鼓风干燥箱干燥6-10小时,得改性海硅藻土。
优选的,所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为20-30wt%,环糊精的含量为1-3wt%。
优选的,所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为8-12g/L,二十二烷基三甲基氯化铵浓度为3-6g/L.
一种基于改性硅藻土的净水剂的制备方法,包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量3-5倍的离子水,水温45-50℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,边搅拌边加热,加热至320-350℃后保温1-2h,自然冷却至室温,即得基于改性硅藻土的净水剂。
优选的,步骤(2)中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末后边搅拌边加热至338℃。
本发明的有益效果是:与现有技术相比,本发明的一种基于改性硅藻土的净水剂及其制备方法具有以下优点:对硅藻土进行预处理和活化表面处理,扩大硅藻土孔隙率,提高其吸附污染物的能力,改性硅藻土与铝盐按照优化后的计量配合使用,提高反应活性和持久性;磷酸三钠和醋酸纤维在高温下均匀溶解并分散在改性硅藻土和铝盐体系中,其中磷酸三钠软化废水中污染物,并促使改性硅藻土和铝盐的净化作用稳定进行,醋酸纤维包覆污染物外壁,污染物被改性硅藻土吸附后,配合改性硅藻土较大的孔隙率,使得硅藻土在吸附较多杂质时仍能够重复利用,减轻硅藻土清洁难度。
具体实施方式
实施例1
一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土42份、铝盐15份、磷酸三钠9份和醋酸纤维10份。
所述改性硅藻土包括如下步骤:
(1)将硅藻土完全浸没在50℃包含有环糊精和氢氧化钠溶液中20分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至45℃保温23分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在52℃下加热50min分钟,将硅藻土滤出在45℃下使用鼓风干燥箱干燥8小时,得改性海硅藻土。
所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为25wt%,环糊精的含量为2wt%。所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为10g/L,二十二烷基三甲基氯化铵浓度为5g/L.
一种基于改性硅藻土的净水剂的制备方法,包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量4倍的离子水,水温48℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,边搅拌边加热,加热至338℃后保温1.5h,自然冷却至室温,即得基于改性硅藻土的净水剂。
实施例2
一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土30份、铝盐10份、磷酸三钠5份和醋酸纤维5份。
所述改性硅藻土包括如下步骤:
(1)将硅藻土完全浸没在55℃包含有环糊精和氢氧化钠溶液中25分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至45℃保温25分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在52℃下加热50min分钟,将硅藻土滤出在40℃下使用鼓风干燥箱干燥6小时,得改性海硅藻土。
所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为20wt%,环糊精的含量为1wt%。所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为8g/L,二十二烷基三甲基氯化铵浓度为3g/L.
一种基于改性硅藻土的净水剂的制备方法,包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量3倍的离子水,水温45℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,边搅拌边加热,加热至320℃后保温1h,自然冷却至室温,即得基于改性硅藻土的净水剂。
实施例3
一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土30份、铝盐10份、磷酸三钠5份和醋酸纤维5份。
所述改性硅藻土包括如下步骤:
(1)将硅藻土完全浸没在60℃包含有环糊精和氢氧化钠溶液中30分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至50℃保温30分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在55℃下加热60min分钟,将硅藻土滤出在50℃下使用鼓风干燥箱干燥10小时,得改性海硅藻土。
所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为30wt%,环糊精的含量为3wt%。所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为12g/L,二十二烷基三甲基氯化铵浓度为6g/L.
一种基于改性硅藻土的净水剂的制备方法,包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量5倍的离子水,水温50℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,边搅拌边加热,加热至350℃后保温2h,自然冷却至室温,即得基于改性硅藻土的净水剂。
对比例1
一种基于改性硅藻土的净水剂,主要由如下重量份数的原料组成:改性硅藻土42份、铝盐15份、磷酸三钠9份和醋酸纤维10份。
所述改性硅藻土包括如下步骤:
(1)将硅藻土完全浸没在50℃包含有环糊精和氢氧化钠溶液中20分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至45℃保温23分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在52℃下加热50min分钟,将硅藻土滤出在45℃下使用鼓风干燥箱干燥8小时,得改性海硅藻土。
所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为25wt%,环糊精的含量为2wt%。所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为10g/L,二十二烷基三甲基氯化铵浓度为5g/L.
一种基于改性硅藻土的净水剂的制备方法,包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量4倍的离子水,水温48℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,常温下搅拌均匀,即得基于改性硅藻土的净水剂。
试验例1
将实施例1-3和对比例1的净水剂按下述测试方法进行性能测试。测的的沉降速率、净水能力、污泥重金属脱除率、改性硅藻土回收率数据如表1所示:
表1
上述具体实施方式仅是本发明的具体个案,本发明的专利保护范围包括但不限于上述具体实施方式的产品形态和式样,任何符合本发明权利要求书且任何所属技术领域的普通技术人员对其所做的适当变化或修饰,皆应落入本发明的专利保护范围。
Claims (2)
1.一种基于改性硅藻土的净水剂,其特征在于:由如下重量份数的原料组成:改性硅藻土42份、铝盐15份、磷酸三钠9份和醋酸纤维10份;
所述改性硅藻土:
(1)将硅藻土完全浸没在50-60℃包含有环糊精和氢氧化钠溶液中20-30分钟,捞出烘干后,得到预处理硅藻土;
(2)预处理硅藻土放入聚乙二醇和二十二烷基三甲基氯化铵水溶液中,加热至40-50℃保温20-30分钟,同时进行磁力搅拌,保温后加入钛酸酯偶联剂,在50-55℃下加热40-60分钟,将硅藻土滤出在40-50℃下使用鼓风干燥箱干燥6-10小时,得改性硅藻土;
所述步骤(1)的含有环糊精和氢氧化钠溶液中氢氧化钠的含量为20-30wt%,环糊精的含量为1-3 wt%;
所述步骤(2)的聚乙二醇和二十二烷基三甲基氯化铵水溶液中聚乙二醇浓度为8-12g/L,二十二烷基三甲基氯化铵浓度为3-6 g/L;
所述净水剂的制备包括如下步骤:
(1)将铝盐、磷酸三钠和醋酸纤维研磨至粒径≤150μm,备用;
(2)将改性硅藻土研磨至粒径≤150μm,向改性硅藻土中加入改性硅藻土重量3-5倍的离子水,水温45-50℃,混合搅拌均匀,向改性硅藻土水溶液中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末,边搅拌边加热,加热至320-350℃后保温1-2h,自然冷却至室温,即得基于改性硅藻土的净水剂。
2.根据权利要求1所述的一种基于改性硅藻土的净水剂,所述净水剂的制备步骤(2)中加入铝盐、磷酸三钠和醋酸纤维研磨成的粉末后边搅拌边加热至338℃。
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