CN106669628A - 一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制备方法 - Google Patents

一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制备方法 Download PDF

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CN106669628A
CN106669628A CN201611198511.4A CN201611198511A CN106669628A CN 106669628 A CN106669628 A CN 106669628A CN 201611198511 A CN201611198511 A CN 201611198511A CN 106669628 A CN106669628 A CN 106669628A
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罗彦保
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Abstract

本发明公开了一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制备方法，其特征在于，是由以下重量份的原料制成：聚丙烯酰胺VN835 3‑6，钠基膨润土30‑50，乙二醇20‑40，活性炭5‑10，硝酸银溶液10‑15，FeSO4·7H2O 12‑22，海藻纤维2‑4，KBH4 5‑10，NaOH 20‑30，脱氧水适量，去离子水30‑80，脱氧乙醇20‑100；本发明引入的载银活性炭，一方面可以增大膨润土的比表面积，从而增加吸附剂与污染物的接触面积，提高吸附效率；另一方面银粒子可以激活已经失活的纳米铁催化剂，提高催化活性、净化效果，同时延长使用寿命。

Description

一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制 备方法
技术领域
本发明属于地下水净化领域，具体涉及一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制备方法。
背景技术
膨润土是以蒙脱石为主要成分的天然纳米吸附材料，阳离子交换容量大，对污染物具有较强的吸附能力，近年来被广泛应用于工业废水中有机污染物、重金属的吸附处理。此外，膨润土还广泛应用于石油、日用、化工、能源和环保等领域。纳米铁相比于普通铁颗粒，活性高，去污效果快。近年来，地下水中的重金属六价铬污染日益受到重视，纳米铁可以有效地将六价铬还原成毒性小、迁移性差的三价铬，使其沉淀固定下来，从而将污染源区的污染物消减固定，防止其向周围扩散，有利于达到进一步控制消除的目标。但是纳米铁颗粒小，所以极易团聚，易氧化失活，因此，解决纳米铁的团聚问题并提高稳定性，成为研究的热点。
李晨桦在《膨润土负载纳米铁去除地下水中六价铬研究》中，利用FeSO4·7H2O和钠基膨润土制备了一种去除六价铬的吸附剂，但是还存在着比表面积小、纳米铁易失活、吸附效率低等问题。
发明内容
基于以上思考，本发明旨在提供一种比表面积大、吸附效率高、使用寿命长的膨润土吸附剂。
本发明所要解决的技术问题采用以下的技术方案实现：
一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂，其特征在于，是由以下重量份的原料制成：
聚丙烯酰胺VN835 3-6，钠基膨润土30-50，乙二醇20-40，活性炭5-10，硝酸银溶液10-15，FeSO4·7H2O 12-22，海藻纤维2-4，KBH4 5-10，NaOH 20-30，脱氧水适量，去离子水30-80，脱氧乙醇20-100；
所述硝酸银溶液的质量分数为1-2%；NaOH溶液的质量分数为0.1-1%。
所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，是由以下步骤制成：
a. 将活性炭加入到乙二醇中，加入硝酸银、海藻纤维、聚丙烯酰胺VN835，浸泡2-5h后，离心，洗涤，在25-55℃条件下真空干燥，得到活性炭混合物；
b. 将步骤a所得活性炭混合物、钠基膨润土加入到去离子水中，持续搅拌20-25h，使其充分分散后，向其中加入FeSO4·7H2O，再持续搅拌20-25h 后，在氮气保护下，加入脱氧乙醇；
c. 将KBH4溶于NaOH中，搅拌条件下滴加到步骤b所得混合液中，立即出现黑色沉淀；滴加完毕后，持续搅拌20-40min，过滤并用脱氧水、脱氧乙醇洗涤2-3次，烘干，即得负载纳米铁、银、活性炭的膨润土吸附剂。
所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，所用钠基膨润土使用前需要过200-300目筛。
本发明的有益效果是：KBH4在碱性条件下可将二价铁还原为零价铁，粘附在膨润土上，解决了纳米铁分散性差限制应用的缺点，又有利于经济型粘土矿物的广泛应用；纳米铁可以有效地将六价铬还原成毒性小、迁移性差的三价铬，使其沉淀固定下来，从而将污染源区的污染物消减固定，防止其向周围扩散，有利于达到进一步控制消除的目标；硝酸银通过高温煅烧会生成单质银，负载在活性炭上，将其引入吸附体系，一方面活性炭可以增大膨润土的比表面积，从而增加吸附剂与污染物的接触面积，提高吸附效率；另一方面银粒子可以激活已经失活的纳米铁催化剂，提高催化活性、净化效果，同时延长使用寿命；聚丙烯酰胺VN835不仅可以与膨润土一起协同除浊，还可以促进银粒子在活性炭上的负载。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步描述。
实施例
一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂，其特征在于，是由以下重量份的原料制成：
聚丙烯酰胺VN835 6，钠基膨润土50，乙二醇40，活性炭10，硝酸银溶液15，FeSO4·7H2O22，海藻纤维4，KBH4 10，NaOH 30，脱氧水适量，去离子水80，脱氧乙醇100；
所述硝酸银溶液的质量分数为1-2%；NaOH溶液的质量分数为0.1-1%。
所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，是由以下步骤制成：
a. 将活性炭加入到乙二醇中，加入硝酸银、海藻纤维、聚丙烯酰胺VN835，浸泡2-5h后，离心，洗涤，在25-55℃条件下真空干燥，得到活性炭混合物；
b. 将步骤a所得活性炭混合物、钠基膨润土加入到去离子水中，持续搅拌20-25h，使其充分分散后，向其中加入FeSO4·7H2O，再持续搅拌20-25h 后，在氮气保护下，加入脱氧乙醇；
c. 将KBH4溶于NaOH中，搅拌条件下滴加到步骤b所得混合液中，立即出现黑色沉淀；滴加完毕后，持续搅拌20-40min，过滤并用脱氧水、脱氧乙醇洗涤2-3次，烘干，即得负载纳米铁、银、活性炭的膨润土吸附剂。
所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，所用钠基膨润土使用前需要过200-300目筛。
本发明的性能测试数据为：反应40min后，六价铬去除率≥90%。

Claims (3)

1.一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂，其特征在于，是由以下重量份的原料制成：
聚丙烯酰胺VN835 3-6，钠基膨润土30-50，乙二醇20-40，活性炭5-10，硝酸银溶液10-15，FeSO4·7H2O 12-22，海藻纤维2-4，KBH4 5-10，NaOH 20-30，脱氧水适量，去离子水30-80，脱氧乙醇20-100；
所述硝酸银溶液的质量分数为1-2%；NaOH溶液的质量分数为0.1-1%。
2.根据权利要求1所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，是由以下步骤制成：
a. 将活性炭加入到乙二醇中，加入硝酸银、海藻纤维、聚丙烯酰胺VN835，浸泡2-5h后，离心，洗涤，在25-55℃条件下真空干燥，得到活性炭混合物；
b. 将步骤a所得活性炭混合物、钠基膨润土加入到去离子水中，持续搅拌20-25h，使其充分分散后，向其中加入FeSO4·7H2O，再持续搅拌20-25h 后，在氮气保护下，加入脱氧乙醇；
c. 将KBH4溶于NaOH中，搅拌条件下滴加到步骤b所得混合液中，立即出现黑色沉淀；滴加完毕后，持续搅拌20-40min，过滤并用脱氧水、脱氧乙醇洗涤2-3次，烘干，即得负载纳米铁、银、活性炭的膨润土吸附剂。
3.根据权利要求2所述的一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂的制备方法，其特征在于，所用钠基膨润土使用前需要过200-300目筛。
CN201611198511.4A 2016-12-22 2016-12-22 一种聚丙烯酰胺协同除浊的负载纳米铁膨润土吸附剂及其制备方法 Pending CN106669628A (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464091A (zh) * 2013-10-08 2013-12-25 武汉科技大学 一种改性膨润土负载纳米铁材料及其制备方法
CN104056664A (zh) * 2014-06-26 2014-09-24 常州大学 一种膨润土负载磷钨酸银催化剂的制备方法
CN104815982A (zh) * 2015-04-01 2015-08-05 上海应用技术学院 一种负载型的纳米零价铁粒子及其制备方法
CN105198021A (zh) * 2015-10-19 2015-12-30 晋城职业技术学院 一种化工废水处理剂及其制备方法
CN105854797A (zh) * 2016-04-11 2016-08-17 中国矿业大学 一种负载纳米零价双金属功能生物炭的制备方法及其应用

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464091A (zh) * 2013-10-08 2013-12-25 武汉科技大学 一种改性膨润土负载纳米铁材料及其制备方法
CN104056664A (zh) * 2014-06-26 2014-09-24 常州大学 一种膨润土负载磷钨酸银催化剂的制备方法
CN104815982A (zh) * 2015-04-01 2015-08-05 上海应用技术学院 一种负载型的纳米零价铁粒子及其制备方法
CN105198021A (zh) * 2015-10-19 2015-12-30 晋城职业技术学院 一种化工废水处理剂及其制备方法
CN105854797A (zh) * 2016-04-11 2016-08-17 中国矿业大学 一种负载纳米零价双金属功能生物炭的制备方法及其应用

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Application publication date: 20170517