CN101054214A - 锌的活性污泥吸附剂及其碱-双氧水制备方法 - Google Patents

锌的活性污泥吸附剂及其碱-双氧水制备方法 Download PDF

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CN101054214A
CN101054214A CN 200610073060 CN200610073060A CN101054214A CN 101054214 A CN101054214 A CN 101054214A CN 200610073060 CN200610073060 CN 200610073060 CN 200610073060 A CN200610073060 A CN 200610073060A CN 101054214 A CN101054214 A CN 101054214A
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activated sludge
mud
zinc
preparation
sludge adsorbent
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曾景海
杨建州
齐鸿雁
张帆远航
张洪勋
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Research Center for Eco Environmental Sciences of CAS
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Research Center for Eco Environmental Sciences of CAS
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Abstract

本发明锌的活性污泥吸附剂及其制备方法涉及一种经过化学试剂处理后制备的活性污泥吸附剂及其制备方法,污泥为污水厂产生的剩余污泥,化学试剂为1%氢氧化钠溶液及1%双氧水溶液,适用于含重金属锌的废水的处理,对锌的吸附效率大于90%。

Description

锌的活性污泥吸附剂及其碱-双氧水制备方法
技术领域
本发明涉及一种重金属锌的活性污泥吸附剂及其制备方法。污泥为污水处理厂产生的剩余污泥。该活性污泥吸附剂用于处理含锌废水。
背景技术
重金属锌是一种毒性相对较小的污染物,但是如果排放量高则会对人表现出有毒有害作用。当水中的锌离子浓度超过17.6mg/L时,开始出现不愉快的味感;当锌离子浓度超过30mg/L时,水出现乳浊状态;当锌离子浓度为30.8mg/L时,饮水会使人感到恶心和晕厥。锌离子对农作物和鱼类的影响比对人的影响要大,当锌离子浓度超过0.5mg/L时,则可使各种鱼类和农作物致死。因此无论从环境保护角度来讲还是从重金属回收角度来讲,对废水中锌离子进行处理是很有必要的。
锌及其盐类在橡胶工业中用作填充剂、活性剂,其同时也被应用于合金、电池、电镀、漂白工业。如果这些工业废水中的锌离子未经处理直接排放到环境中,其将会对人类、鱼类及农作物产生毒害作用。目前对锌离子的处理方法有化学处理法、离子交换法等等。这些方法都存在成本高,工艺复杂及容易产生二次污染等问题。因此,寻求高效廉价的含锌离子废水处理方法成为迫切需要解决的问题。通过研究发现,利用污水处理厂的剩余污泥,经过预处理加工成活性污泥吸附剂,对锌离子有很好的吸附效果。并且将剩余污泥废物利用成本低廉,有良好的应用前景。
发明内容
本发明锌的活性污泥吸附剂及其制备方法提出了一种可以有效吸附去除含锌废水中重金属锌离子的活性污泥吸附剂及其制备方法。
本发明锌的活性污泥吸附剂及其制备方法的技术方案是取污水处理厂的剩余污泥,烘干、研磨、筛取,经过化学试剂的预处理后制成活性污泥吸附剂,直接使用或者空气干燥备用。
本发明重金属锌活性污泥吸附剂及其制备方法的具体操作步骤为:
1、取污水处理厂的剩余污泥泥饼烘干:
取污水处理厂压滤后的剩余污泥泥饼1000g,置入烘箱中烘干至恒重。
2、干污泥研磨:
将烘干后的污泥研磨成粉末。
3、将污泥粉末过筛筛取:
将活性污泥粉末过180目筛,即取粒径小于88μm的污泥粉末做后续处理。
4、污泥粉末预处理:
将筛取得到的活性污泥粉末置入1%的氢氧化钠溶液中浸泡6小时,离心倾去上清夜后使污泥颗粒重新悬浮在双氧水溶液中浸泡6个小时。
5、收集活性污泥吸附剂:
将4中的混合液离心,弃去上清夜即可得到活性污泥吸附剂,可直接使用或者空气干燥备用。
所述的锌的活性污泥吸附剂制备方法中,其所述第1步中烘干的温度要小于100℃;
所述的锌的活性污泥吸附剂制备方法中,其所述第4,5步中离心的条件为4000rpm,5min。
具体实施方式
以下通过具体实事例详细说明发明的实施,目的在于帮助读者更好地理解本发明的实质,但不作为对本发明实施范围的限定。
实施例1:将活性污泥吸附剂投入锌离子浓度为200mg/L的电镀废水中,使得最后吸附剂的浓度达到2g/L,23℃下吸附17h,6000rpm离心5分钟,收集上清液,使用火焰原子吸收法测定上清液中锌离子的浓度为14mg/L。本活性污泥吸附剂对该工业污水中锌的吸附量为93mg/g。
实施例2:将活性污泥吸附剂投入锌离子浓度为20mg/L的工业废水中,使得最后活性污泥吸附剂浓度达到2g/L,23℃下吸附15h,6000rpm离心5分钟,收集上清液,使用火焰原子吸收法测定上清液中锌离子的浓度为0.2mg/L。本生物吸附剂对工业污水中锌的吸附量为9.9mg/g。

Claims (8)

1、一种锌的活性污泥吸附剂,由污水处理厂产生的剩余污泥作为基本材料,通过化学试剂处理后制成锌的活性污泥吸附剂。
2、根据权利要求1所述的活性污泥吸附剂,其特征在于:活性污泥为污水处理厂产生的剩余污泥。
3、根据权利要求1所述的活性污泥吸附剂,其特征在于:化学试剂为氢氧化钠和双氧水,浓度分别为1%。
4、根据权利要求1所述的活性污泥吸附剂,其制备方法:
a取污水处理厂产生的污泥泥饼,并烘干;
b待污泥烘干后将其研磨为粉末状;
c将得到的粉末状污泥过分样筛筛取并进行后续处理;
d将筛选得到的颗粒用氢氧化钠溶液浸泡6小时,离心倾去上清夜后再用双氧水浸泡6个小时;
e将活性污泥浸泡混合液离心,倒去上清夜,收集污泥颗粒;
f将离心得到的污泥颗粒直接使用或者空气干燥备用。
5、根据权利要求4所述的活性污泥吸附剂的制备方法,其特征在于:所述烘干过程,温度低于100℃。
6、根据权利要求4所述的活性污泥吸附剂的制备方法,其特征在于:所述分样筛筛取过程要取粒径小于88μm(180目)的颗粒进行后续处理。
7、根据权利要求4所述的活性污泥吸附剂的制备方法,其特征在于:氢氧化钠溶液浓度为1%,双氧水溶液浓度为1%。
8、根据权利要求4所述的活性污泥吸附剂的制备方法,其特征在于:浸泡混合液离心条件为4000rpm,5min。
CN 200610073060 2006-04-12 2006-04-12 锌的活性污泥吸附剂及其碱-双氧水制备方法 Pending CN101054214A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706339A (zh) * 2014-01-15 2014-04-09 山东大学 一种制备交联剩余污泥重金属吸附剂的方法
CN105903426A (zh) * 2016-05-09 2016-08-31 河海大学 一种改性给水污泥及其制备方法和应用

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103706339A (zh) * 2014-01-15 2014-04-09 山东大学 一种制备交联剩余污泥重金属吸附剂的方法
CN103706339B (zh) * 2014-01-15 2015-07-08 山东大学 一种制备交联剩余污泥重金属吸附剂的方法
CN105903426A (zh) * 2016-05-09 2016-08-31 河海大学 一种改性给水污泥及其制备方法和应用

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