CN112058224A - 一种去除污水中汞的复合生物炭改性材料的制备方法 - Google Patents
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Abstract
本发明提供一种去除污水中汞的复合生物炭改性材料的制备方法,包括如下步骤:取厨余垃圾,清洗干净后干燥并粉碎形成颗粒状的物料A;将所述物料A进行加热碳化,冷却至室温后碾磨形成生物质粉末,其中加热条件为前1小时升温至200℃,恒温2小时后,再以10℃/min速度升温至500℃,然后恒温3小时;取粉煤灰、生石灰及凹凸棒粉,将所述粉煤灰、生石灰及凹凸棒粉与所述物料A混合形成物料B,其中所述粉煤灰、生石灰、凹凸棒粉及物料A的重量比为1:3:1:6;将所述物料B造粒形成1‑3mm的颗粒;将颗粒状的物料B在200℃条件下加热30分钟,冷却至室温后完成制备。本发明制备而成的去除污水中汞的复合生物炭改性材料在吸附汞的同时可以改善污水的酸性条件。
Description
技术领域
本发明涉及汞的吸附技术领域,具体涉及一种去除污水中汞的复合生物炭改性材料的制备方法。
背景技术
汞(Hg)是常见的水体重金属污染物,严重威胁到了人类的健康。因此,如何治理并去除水体中汞污染成为当今的热点话题。生物炭是生物质在限氧条件下热解制备而成的富碳颗粒,通常是指以植物和动物生物质热分解产生的生物残留物为基础,在氧气缺乏、温度低于700℃条件下不完全燃烧所产生的炭,近些年来被广泛应用在农业环境污染修复。从吸附特征来看,生物炭具有多孔性、高稳定性、强吸附性的特点,在污水处理的领域中应用较为广泛。
相关技术中,在酸性污水条件中,通常采用磁性秸秆生物炭进行汞的吸附,磁性秸秆生物炭利用稻草、棉花等作物的秸秆为制备生物炭的原料,采用共同沉淀法制得到,该种生物炭中,溶液pH值对磁性棉花秸秆生物炭吸附的影响较大,通常用于酸性条件的污水吸附。该种磁性秸秆生物炭仅仅能吸附汞,无法中和污水中的酸性条件,酸性条件污水对管路存在极大的腐蚀作用。
因此,实有必要提供一种新的去除污水中汞的复合生物炭改性材料的制备方法以解决上述问题。
发明内容
本发明的目的是克服上述技术问题,提供一种可以调节酸性污水条件的去除污水中汞的复合生物炭改性材料的制备方法。
为了实现上述目的,本发明提供一种去除污水中汞的复合生物炭改性材料的制备方法,包括如下步骤:
S1:取厨余垃圾,清洗干净后干燥并粉碎形成颗粒状的物料A;
S2:将所述物料A进行加热碳化,冷却至室温后碾磨形成生物质粉末,其中加热条件为前1小时升温至200℃,恒温2小时后,再以10℃/min速度升温至500℃,然后恒温3小时;
S3:取粉煤灰、生石灰及凹凸棒粉,将所述粉煤灰、生石灰及凹凸棒粉与所述物料A混合形成物料B,其中所述粉煤灰、生石灰、凹凸棒粉及物料A的重量比为1:3:1:6;
S4:将所述物料B造粒形成1-3mm的颗粒;
S5:将颗粒状的物料B在200℃条件下加热30分钟,冷却至室温后完成制备。
优选的,所述步骤S1中厨余垃圾包括龙虾壳、鱼骨、蛋壳及菜根中的至少一种。
优选的,所述厨余垃圾包括龙虾壳和鱼骨,其中龙虾壳和鱼骨的比例为3:1。
优选的,所述步骤S2及步骤S5中,加热过程均采用氮气作为氛围气。
优选的,所述步骤S1中清洗过程采用超声波清洗。
优选的,所述步骤S2中,所述生物质粉末的粒度为60-80目。
本发明还提供一种去除污水中汞的复合生物炭改性材料,采用上述的制备方法制备而成。
与相关技术相比,本发明提供的去除污水中汞的复合生物炭改性材料的制备方法中,采用厨余垃圾制成生物质,满足节能环保的需求,并通过生物质与粉煤灰、生石灰及凹凸棒粉配合造粒,再次碳化后,形成颗粒状,可以方便使用时进行投放,并且所述生石灰的添加可以有效中和污水中的酸性条件,减小对管路的腐蚀。
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,所描述的实施例仅是本发明的一部分实施例,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它实施例,都属于本发明保护的范围。
本发明提供一种去除污水中汞的复合生物炭改性材料的制备方法,包括如下步骤:
S1:取厨余垃圾,清洗干净后干燥并粉碎形成颗粒状的物料A;
S2:将所述物料A进行加热碳化,冷却至室温后碾磨形成生物质粉末,其中加热条件为前1小时升温至200℃,恒温2小时后,再以10℃/min速度升温至500℃,然后恒温3小时;
S3:取粉煤灰、生石灰及凹凸棒粉,将所述粉煤灰、生石灰及凹凸棒粉与所述物料A混合形成物料B,其中所述粉煤灰、生石灰、凹凸棒粉及物料A的重量比为1:3:1:6;
S4:将所述物料B造粒形成1-3mm的颗粒;
S5:将颗粒状的物料B在200℃条件下加热30分钟,冷却至室温后完成制备。
所述步骤S1中厨余垃圾包括龙虾壳、鱼骨、蛋壳及菜根中的至少一种。可以理解的是,厨余垃圾属于分类垃圾中的一种,易于收集,并且实现了废物的再利用,满足节能环保的建设理念。优选的,在本实施方式中,所述厨余垃圾包括龙虾壳和鱼骨,其中龙虾壳和鱼骨的比例为3:1。龙虾壳和鱼骨表面粗糙,具有较强的吸附性。
所述步骤S2中,先升温至200℃并保持恒温2小时,可以使所述物料A内的水分析出,而后在升温至500℃使其炭化。炭化后,所述物料A表面形成丰富的微孔结构,吸附汞的能力得到极大的增强。
所述步骤S3中,粉煤灰表面同样存在微小的孔隙结构,具备一定的吸附能力,将所述粉煤灰、生石灰及凹凸棒粉与所述物料A混合形成物料B,使得所述粉煤灰、生石灰及凹凸棒粉附着在所述物料A表面,所述凹凸棒粉起到粘结作用。造粒过程需要添加一定的水分,造粒完成后,将所述物料B再次加热,可以使颗粒状的物料B干燥成型。
所述复合生物炭改性材料制备完成后,呈颗粒状,可以方便自动化机械投放,并且投放过程中不会产生产生灰尘;投放后,所述复合生物炭改性材料的外表层在水中溶化并脱离,裸露出内部的生物炭,进行贡的吸附,脱落的粉煤灰同样可以进行吸附,生石灰可以用于调节污水的酸性条件,减小对管路的腐蚀。
进一步,所述步骤S2及步骤S5中,加热过程均采用氮气作为氛围气;所述步骤S1中清洗过程采用超声波清洗;所述步骤S2中,所述生物质粉末的粒度为60-80目。
与相关技术相比,本发明提供的去除污水中汞的复合生物炭改性材料的制备方法中,采用厨余垃圾制成生物质,满足节能环保的需求,并通过生物质与粉煤灰、生石灰及凹凸棒粉配合造粒,再次碳化后,形成颗粒状,可以方便使用时进行投放,并且所述生石灰的添加可以有效中和污水中的酸性条件,减小对管路的腐蚀。
以上所述的仅是本发明的实施方式,在此应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出改进,但这些均属于本发明的保护范围。
Claims (6)
1.一种去除污水中汞的复合生物炭改性材料的制备方法,其特征在于,包括如下步骤:
S1:取厨余垃圾,清洗干净后干燥并粉碎形成颗粒状的物料A;
S2:将所述物料A进行加热碳化,冷却至室温后碾磨形成生物质粉末,其中加热条件为前1小时升温至200℃,恒温2小时后,再以10℃/min速度升温至500℃,然后恒温3小时;
S3:取粉煤灰、生石灰及凹凸棒粉,将所述粉煤灰、生石灰及凹凸棒粉与所述物料A混合形成物料B,其中所述粉煤灰、生石灰、凹凸棒粉及物料A的重量比为1:3:1:6;
S4:将所述物料B造粒形成1-3mm的颗粒;
S5:将颗粒状的物料B在200℃条件下加热30分钟,冷却至室温后完成制备。
2.根据权利要求1所述的制备方法,其特征在于,所述步骤S1中厨余垃圾包括龙虾壳、鱼骨、蛋壳及菜根中的至少一种。
3.根据权利要求2所述的制备方法,其特征在于,所述厨余垃圾包括龙虾壳和鱼骨,其中龙虾壳和鱼骨的比例为3:1。
4.根据权利要求1所述的制备方法,其特征在于,所述步骤S2及步骤S5中,加热过程均采用氮气作为氛围气。
5.根据权利要求1所述的制备方法,其特征在于,所述步骤S1中清洗过程采用超声波清洗。
6.根据权利要求1所述的制备方法,其特征在于,所述步骤S2中,所述生物质粉末的粒度为60-80目。
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CN113058579A (zh) * | 2021-03-23 | 2021-07-02 | 贵州省材料产业技术研究院 | 一种珊瑚礁状TiO2(C)材料的制备方法和产品及其应用 |
CN113979515A (zh) * | 2021-10-27 | 2022-01-28 | 沈阳建筑大学 | 一种用于污水处理的铁碳微电解颗粒及其制备方法 |
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