CN112110512A - 一种高炉镍铁渣地聚合物在吸附亚甲基蓝中的应用 - Google Patents
一种高炉镍铁渣地聚合物在吸附亚甲基蓝中的应用 Download PDFInfo
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Abstract
本发明公开了一种高炉镍铁渣地聚合物在吸附亚甲基蓝中的应用,所述高炉镍铁渣地聚合物的组成物及重量份为高炉镍铁渣100份、NaOH1~7份、水玻璃7~36份、水6~20份;采用高炉镍铁渣地聚合物吸附亚甲基蓝,实验结果显示具有较好的吸附性能,本发明方法提高了高炉镍铁渣的综合利用率,对吸附亚甲基蓝污染的治理提供了新思路。
Description
技术领域
本发明属于重金属吸附剂技术领域,尤其涉及高炉镍铁渣地聚合物在吸附亚甲基蓝中的新用途。
背景技术
地聚合物是法国科学家Davidovits利用活性Si–Al质材料与高浓度碱溶液反应时,首次制备出的具有高分子聚合物结构的新型无机胶凝材料,其基本结构单元为(–Si–O–Al–)、(–Si–O–Al–O–Si–O–)或(–Si–O–Al–O–Si–O–Si–O–)。另外Davidovites解释了地聚物简单形成原理就是,含有活性的含铝硅酸盐物质,碱性条件下形成聚合硬化体。地聚合物原料主要为铝硅酸盐废渣(如粉煤灰,高炉矿渣等)制备矿物聚合物,且该材料机械性能优良、耐酸碱、耐火、耐高温等特点。
有机染料主要应用于纤维的染色,如棉、毛、丝、麻、人造纤维、合成纤维、纸张、皮革等;也可用于塑料、油脂、皂烛、铝制品、墨水、铅笔、彩色照相材料以及食品工业等。随着工业技术的不断发展,工业染料废水的危害日益凸显,其中亚甲基蓝常用于工业染料的加工,产生的废水污染性强,对人体危害性大。目前,废水中有机染料的处理方法也很多,物理处理法有沉淀法和吸附法,化学处理法有中和法、混凝法和氧化法;生物法有生物转盘、生物转筒和生物接触氧化法。目前研究吸附法较少。
发明内容
针对现有技术存在的问题,本发明提供了一种高炉镍铁渣地聚合物的新用途,即高炉镍铁渣地聚合物在吸附亚甲基蓝中的应用,所述高炉镍铁渣地聚合物的组成物及重量份为高炉镍铁渣100份、NaOH 1~7份、水玻璃7~36份、水6~20份;该方法既解决亚甲基蓝在废水中的污染,又解决高炉镍铁渣大量堆放占用土地资源的问题。
所述高炉镍铁渣的主要成分为:SiO226~31wt%、MgO10~14wt%、CaO19~30wt%、Al2O319~35wt%。
所述高炉镍铁渣是经过粉磨后过80目筛,筛余量小于5%的废渣粉。
所述NaOH替换为KOH、Ca(OH)2
本发明技术方案的优点和技术效果:
本发明采用高炉镍铁渣为主要原料,配合碱激发剂并用该材料吸附亚甲基蓝;该材料吸附亚甲基蓝效果显著,同时能够有效利用工业废渣,提高高炉镍铁渣的综合利用率,对亚甲基蓝的治理提供了新思路。
具体实施方式
为了更好地理解本发明的内容,下面通过具体的实施例对本发明作进一步详细说明,但本发明保护范围不局限于所述内容。
实施例1:本高炉镍铁渣地聚合物的组成物为高炉镍铁渣100g、NaOH 2.5g、水玻璃22g、水15g,其中高炉镍铁渣的主要成分为:SiO2 29.27wt%、MgO 11.49wt%、CaO 29.01wt%、Al2O3 19.31wt%;高炉镍铁渣经过粉磨后过80目筛,筛余量小于5%的废渣粉;
上述高炉镍铁渣地聚合物制备时,将NaOH、水玻璃和水混合搅拌均匀并放置24h制得碱激发剂;将高炉镍铁渣、碱性激发剂置于搅拌器中搅拌5min得浆体;将浆体注入20mm×20mm×20mm六联模具中,常温24h后脱模,得到固化块高炉镍铁渣地聚合物材料,将固化块在常温放置7d,测其抗压强度为78MPa。
将上述方法制得的固化块粉碎后用于后续的吸附实验,处理50mL浓度100mg/L的亚甲基蓝溶液,溶液设置不同pH值,pH为2、4、6、8、10,每个pH值设置3个重复,然后在每个检测样品中添加0.5g粉碎后的高炉镍铁渣地聚合物,在水平恒温震荡仪中搅拌处理,设置水平恒温振荡器的参数为25℃、140r/min,振荡6h后,然后采用注射器吸取上层清液,测定溶液中的亚甲基蓝含量,在亚甲基蓝吸附的过程中,亚甲基蓝的去除率随pH的变化结果如表1所示,从表1可知亚甲基蓝随pH的增加去除率逐渐增加,当pH为8时,亚甲基蓝的吸附率可达到73.25%,再往后吸附率变化不大。
表1不同pH条件下高炉镍铁渣多孔材料对亚甲基蓝的效果
实施例2:本高炉镍铁渣地聚合物的组成物为高炉镍铁渣100g、NaOH 5g、水玻璃10g、水10g,其中高炉镍铁渣的主要成分为:SiO2 29.27wt%、MgO 11.49wt%、CaO 29.01wt%、Al2O319.31wt%;高炉镍铁渣经过粉磨后过80目筛,筛余量小于5%的废渣粉;
上述高炉镍铁渣地聚合物制备时,将NaOH、水玻璃和水混合搅拌均匀并放置24h制得碱激发剂;将高炉镍铁渣、碱性激发剂置于搅拌器中搅拌5min得浆体;将浆体注入20mm×20mm×20mm六联模具中,常温24h后脱模,得到固化块地聚多孔材料,将固化块在常温放置7d,测其抗压强度为75.2MPa。
将上述方法制得的固化块粉碎后用于后续的吸附实验,待处理pH为8的50mL浓度100mg/L的亚甲基蓝,向其中加入0.5g粉碎后的地聚合物材料,并设置水平恒温振荡器的参数为25℃、140r/min,分别在30min、90min、240min、360min 、480min采用注射器吸取上层清液,每个时间设置3个重复,测定溶液中的亚甲基蓝含量,在亚甲基蓝吸附的过程中,亚甲基蓝的去除率随时间变化结果如表2所示,从表2可知亚甲基蓝随时间的增加去除率逐渐增加,当时间为360min时,亚甲基蓝的吸附率可达到70.25%,再往后吸附率变化不大,因此,在考虑时间为360min。
表2不同时间下高炉镍铁渣多孔材料对亚甲基蓝的效果
实施例3:本高炉镍铁渣地聚合物的组成物为高炉镍铁渣100g、NaOH 6g、水玻璃30g、水20g,其中高炉镍铁渣的主要成分为:SiO2 29.27wt%、MgO 11.49wt%、CaO 29.01wt%、Al2O319.31wt%;高炉镍铁渣经过粉磨后过80目筛,筛余量小于5%的废渣粉;
上述高炉镍铁渣地聚合物制备时,将NaOH、水玻璃和水混合搅拌均匀并放置24h制得碱激发剂,将高炉镍铁渣、碱性激发剂置于搅拌器中搅拌5min得浆体;将浆体注入20mm×20mm×20mm六联模具中,常温24h后脱模,得到固化块地聚合物材料,将固化块在常温放置7d,测其抗压强度为77.52MPa;
将上述方法制得的固化块粉碎后用于后续的吸附实验,待处理pH为8的50mL的亚甲基蓝,浓度分别在50、100、200、300mg/L,每个浓度设置3个重复,向其中分别加入0.5g粉碎后的地聚合物材料,并设置水平恒温振荡器的参数为25℃、140r/min、360min,采用注射器吸取上层清液,测定溶液中的亚甲基蓝含量,在亚甲基蓝吸附的过程中,亚甲基蓝的去除率随浓度变化结果如表3所示,从表3可知亚甲基蓝随浓度的增加去除率逐渐下降,当浓度为100mg/L时,亚甲基蓝的吸附率可达到74.32%。
表3不同浓度下高炉镍铁渣多孔材料对亚甲基蓝的效果
实施例4:本高炉镍铁渣地聚合物的组成物为高炉镍铁渣100g、KOH 2g、水玻璃7g、水7g,其中高炉镍铁渣的主要成分为:SiO2 29.27wt%、MgO 11.49wt%、CaO 29.01wt%、Al2O319.31wt%;高炉镍铁渣经过粉磨后过80目筛,筛余量小于5%的废渣粉;
上述高炉镍铁渣地聚合物制备时,将NaOH、水玻璃和水混合搅拌均匀并放置24h制得碱激发剂;将高炉镍铁渣、碱性激发剂置于搅拌器中搅拌5min得浆体;将浆体注入20mm×20mm×20mm六联模具中,常温24h后脱模,得到固化块地聚材料,将固化块在常温放置7d,测其抗压强度为76.42MPa;
将上述方法制得的固化块高炉镍铁渣地聚合物粉碎后用于后续的吸附实验,待处理pH为8的50mL浓度100mg/L的亚甲基蓝,向其中加入0.5g粉碎后的地聚合物材料,并设置水平恒温振荡器的参数为140r/min、360min,温度分别为25、35、45、55℃,然后采用注射器吸取上层清液,每个温度设置3个重复,测定溶液中的亚甲基蓝含量,在亚甲基蓝吸附的过程中,亚甲基蓝的去除率随温度的变化结果如表4所示,从表4可知亚甲基蓝随温度的去除率逐渐增大,当温度为35℃时,亚甲基蓝的吸附率可达到72.36,随后继续增加温度,去除率变化不大,考虑成本问题,选择最佳温度为35℃
表4不同浓度下高炉镍铁渣多孔材料对亚甲基蓝的效果
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (3)
1.一种高炉镍铁渣地聚合物在吸附亚甲基蓝中的应用,其特征在于:高炉镍铁渣地聚合物的组成物及重量份为高炉镍铁渣100份、NaOH 1~7份、水玻璃7~36份、水6~20份。
2.根据权利要求1所述的应用,其特征在于:高炉镍铁渣是经过粉磨后过80目筛,筛余量小于5%的废渣粉。
3.根据权利要求1所述的应用,其特征在于:NaOH替换为KOH、Ca(OH)2。
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