CN106698853A - 一种处理含有放射性物质的污水的方法 - Google Patents
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Abstract
本发明公开了一种处理含有放射性物质的污水的方法,调节污水pH值后向污水中加入活性吸附剂进行搅拌,固液分离后,将固体沉淀固定化,然后在去除放射性的污水中按次序加入细菌和酶,分别进行搅拌和静置来净水。本发明和现有技术相比,采用的活性吸附剂比表面积大、吸附过滤性能好、成本低,配合微生物净水剂可以除去放射性污水中包括放射性物质在内的大部分污染物。
Description
技术领域
本发明涉及环保领域,具体是一种处理含有放射性物质的污水的方法。
背景技术
污水,通常指受一定污染的、来自生活和生产的排出水。污水主要有生活污水、工业废水和初期雨水。随着我国工业的发展,工业废水的排放量日益增加,达不到排放标准的工业废水排入水体后,会污染地表水和地下水。水体一旦受到污染,要想在短时间内恢复到原来的状态是不容易的。水体受到污染后,不仅会使其水质不符合饮用水、渔业用水的标准,还会使地下水中的化学有害物质和硬度增加,影响地下水的利用。我国的水资源并不丰富,若按人口平均占有径流量计算,只相当于世界人均值的四分之一。而地表水和地下水的污染,将进一步使可供利用的水资源数量日益减少,势必影响工农渔业生产,直接或间接地给人民生活和身体健康带来危害。污水的主要污染物源有病原体污染、有机污染物、放射性污染物、无机污染物等很多种。有放射性物质的污水中往往还有混合型的污染物,传统处理方法往往效果很差。
发明内容
本发明的目的在于提供一种处理含有放射性物质的污水的方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:
一种处理含有放射性物质的污水的方法,包括以下步骤:
(1)过滤污水并调节污水pH值至pH≥2;
(2)向污水中加入活性吸附剂,在40℃-60℃环境下搅拌3-5h;
(3)固液分离后,向得到的固体中加入水泥和水,并搅拌,凝固后进行深层填埋;
(4)经过固液分离后的污水加入水芽殖杆菌菌粉和厦门希瓦氏菌菌粉,搅拌1-2h,静置5-7h;
(5)调节pH值至4-6,加入醛脱氢酶和角蛋白酶,在30℃-50℃环境下,搅拌1-2h,静置6-9小时。
作为本发明进一步的方案:步骤(2)中所述活性吸附剂的组成按重量比为:蛭石粉42-54份、活性硅酸钙25-37份、辉石5-7份、玄武岩纤维8-11份、硫酸钙2.3-4.1份、碳纳米管0.2-0.4份、纳米二氧化钛7-9份、酒石酸钾1.3-2.5份和硅溶胶8-11份。
作为本发明进一步的方案:活性吸附剂的制备方法为:
(1)将玄武岩纤维粉碎过150-180目筛,加入纳米二氧化钛、硅溶胶搅拌研磨1-2小时,于150-180℃下烘干制得改性纳米二氧化钛;
(2)将改性纳米二氧化钛和蛭石粉于200℃-250℃混合搅拌1-1.5h;
(3)将酒石酸钾加水搅拌至完全溶解,加入步骤(2)物料搅拌0.5-0.8h,升温至90-110℃继续搅拌0.5-1h,再加入活性硅酸钙及其他剩余成分分散研磨2-3h,烘干出料。
作为本发明进一步的方案:步骤(4)中加入的水芽殖杆菌菌粉量为30-70mg/L,厦门希瓦氏菌菌粉菌粉量为20-50mg/L。
作为本发明进一步的方案:步骤(5)中加入的醛脱氢酶量为5-10mg/L和角蛋白酶量为2-10mg/L。
与现有技术相比,本发明的有益效果是:本发明采用的活性吸附剂比表面积大、吸附过滤性能好、成本低,配合微生物净水剂可以除去放射性污水中包括放射性物质在内的大部分污染物。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:取蛭石粉52份、活性硅酸钙27份、辉石5份、玄武岩纤维9份、硫酸钙2.3份、碳纳米管0.4份、纳米二氧化钛7份、酒石酸钾1.3份和硅溶胶11份;将玄武岩纤维粉碎过180目筛,加入纳米二氧化钛、硅溶胶搅拌研磨1小时,于180℃下烘干制得改性纳米二氧化钛;将改性纳米二氧化钛和蛭石粉于250℃混合搅拌1h;将酒石酸钾加水搅拌至完全溶解,之前的物料搅拌0.6h,升温至100℃继续搅拌1h,再加入活性硅酸钙及其他剩余成分分散研磨3h,烘干出料。
实施例2:取蛭石粉42份、活性硅酸钙25份、辉石7份、玄武岩纤维11份、硫酸钙4.1份、碳纳米管0.2份、纳米二氧化钛9份、酒石酸钾2.5份和硅溶胶8份;将玄武岩纤维粉碎过180目筛,加入纳米二氧化钛、硅溶胶搅拌研磨1.2小时,于160℃下烘干制得改性纳米二氧化钛;将改性纳米二氧化钛和蛭石粉于220℃混合搅拌1.3h;将酒石酸钾加水搅拌至完全溶解,之前的物料搅拌0.5h,升温至90℃继续搅拌0.8h,再加入活性硅酸钙及其他剩余成分分散研磨2h,烘干出料。
实施例3:取蛭石粉54份、活性硅酸钙37份、辉石6份、玄武岩纤维10份、硫酸钙3份、碳纳米管0.3份、纳米二氧化钛10份、酒石酸钾2份和硅溶胶10份;将玄武岩纤维粉碎过150目筛,加入纳米二氧化钛、硅溶胶搅拌研磨2小时,于150℃下烘干制得改性纳米二氧化钛;将改性纳米二氧化钛和蛭石粉于200℃混合搅拌1.5h;将酒石酸钾加水搅拌至完全溶解,之前的物料搅拌0.8h,升温至110℃继续搅拌0.5h,再加入活性硅酸钙及其他剩余成分分散研磨2.5h,烘干出料。
实施例4:过滤污水并调节污水pH值至pH≥2;向300ml污水中加入实施例1中制成的活性吸附剂6g,在40℃环境下搅拌5h;固液分离后,向得到的固体加入水泥和水,并搅拌,凝固后进行深层填埋;经过固液分离后的污水加入水芽殖杆菌菌粉9mg和厦门希瓦氏菌菌粉15mg,搅拌2h,静置5h;调节pH值至4,加入醛脱氢酶3mg和角蛋白酶0.6mg,在30℃环境下,搅拌1h,静置9小时。
检测后,Co2+去除率达98.9%,UO2 2+去除率达99.6%,Sr2+去除率达97.1%,Ba2+去除率达98.3%,CODcr值为53.2mg/L;pH值为7.4左右;SS值为36.5mg/L。
实施例5:过滤污水并调节污水pH值至pH≥2;向300ml污水中加入实施例2中制成的活性吸附剂6g,在60℃环境下搅拌3h;固液分离后,向得到的固体加入水泥和水,并搅拌,凝固后进行深层填埋;经过固液分离后的污水加入水芽殖杆菌菌粉21mg和厦门希瓦氏菌菌粉6mg,搅拌1h,静置7h;调节pH值至5,加入醛脱氢酶1.5mg和角蛋白酶2.4mg,在40℃环境下,搅拌2h,静置7小时。
检测后,Co2+去除率达98.5%,UO2 2+去除率达99.2%,Sr2+去除率达97.7%,Ba2+去除率达98.6%,CODcr值为56.3mg/L;pH值为7.3左右;SS值为41.3mg/L。
实施例6:过滤污水并调节污水pH值至pH≥2;向300ml污水中加入实施例3中制成的活性吸附剂6g,在50℃环境下搅拌4h;固液分离后,向得到的固体加入水泥和水,并搅拌,凝固后进行深层填埋;经过固液分离后的污水加入水芽殖杆菌菌粉18mg和厦门希瓦氏菌菌粉9mg,搅拌1.5h,静置6h;调节pH值至6,加入醛脱氢酶2.4mg和角蛋白酶3mg,在50℃环境下,搅拌1.5h,静置6小时。
检测后,Co2+去除率达99.3%,UO2 2+去除率达99.1%,Sr2+去除率达98.2%,Ba2+去除率达98.1%,CODcr值为43.4mg/L;pH值为7.4左右;SS值为31.2mg/L。
对比例1:和实施例4相比,仅不加入活性吸附剂。
对比例2:和实施例4相比,仅将6g活性吸附剂换成6g沸石。
对比例3:和实施例4相比,仅将6g活性吸附剂换成6g活性炭。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。
Claims (5)
1.一种处理含有放射性物质的污水的方法,其特征在于,包括以下步骤:
(1)过滤污水并调节污水pH值至pH≥2;
(2)向污水中加入活性吸附剂,在40℃-60℃环境下搅拌3-5h;
(3)固液分离后,向得到的固体中加入水泥和水,并搅拌,凝固后进行深层填埋;
(4)经过固液分离后的污水加入水芽殖杆菌菌粉和厦门希瓦氏菌菌粉,搅拌1-2h,静置5-7h;
(5)调节pH值至4-6,加入醛脱氢酶和角蛋白酶,在30℃-50℃环境下,搅拌1-2h,静置6-9小时。
2.根据权利要求1所述的处理含有放射性物质的污水的方法,其特征在于,步骤(2)中所述活性吸附剂的组成按重量比为:蛭石粉42-54份、活性硅酸钙25-37份、辉石5-7份、玄武岩纤维8-11份、硫酸钙2.3-4.1份、碳纳米管0.2-0.4份、纳米二氧化钛7-9份、酒石酸钾1.3-2.5份和硅溶胶8-11份。
3.根据权利要求2所述的处理含有放射性物质的污水的方法,其特征在于,所述活性吸附剂的制备方法为:
(1)将玄武岩纤维粉碎过150-180目筛,加入纳米二氧化钛、硅溶胶搅拌研磨1-2小时,于150-180℃下烘干制得改性纳米二氧化钛;
(2)将改性纳米二氧化钛和蛭石粉于200℃-250℃混合搅拌1-1.5h;
(3)将酒石酸钾加水搅拌至完全溶解,加入步骤(2)物料搅拌0.5-0.8h,升温至90-110℃继续搅拌0.5-1h,再加入活性硅酸钙及其他剩余成分分散研磨2-3h,烘干出料。
4.根据权利要求1所述的处理含有放射性物质的污水的方法,其特征在于,步骤(4)中加入的水芽殖杆菌菌粉量为30-70mg/L,厦门希瓦氏菌菌粉菌粉量为20-50mg/L。
5.根据权利要求1所述的处理含有放射性物质的污水的方法,其特征在于,步骤(5)中加入的醛脱氢酶量为5-10mg/L,角蛋白酶量为2-10mg/L。
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