给水厂残泥免烧陶粒的制备与性能表征
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摘要
本研究以给水厂残泥为主要原料,采用免烧法制成了给水厂残泥免烧陶粒(UCWTR),通过正交试验,确定了UCWTR制备的最佳配比。结果表明:原料的最佳质量配比为给水厂残泥60%、水泥15%、添加剂20%、激发剂5%,另外每100 g原料用水30～35 mL,水玻璃2 g。最佳质量配比条件下,WTR免烧陶粒在水中解体率为3.66%,强度较好,吸水率为31.76%,比表面积为17.837 m2/g,总孔容0.058 25 cm3/g,孔径3.920nm,破损率与磨损率之和为0.35%,含泥量为0.5%,堆积密度为900～950 kg/m3,表观密度1 000～1 200 kg/m3,满足规范要求。本研究制得的UCWTR性能良好,可作为一种陶粒滤料材料应用于水处理中。
The UCWTR was prepared using water treatment residuals with some auxiliary materials. The orthogonal test method is used to determine the various raw materials by using the parameters of strength, water absorption and specific surface area as indicators. The results show that the optimum amount of raw materials is WTR 60%, cement 15%, additive 20%, 5% activator, 2% sodium silicate, and 30～35 mL water. At this time, the disintegration rate of WTR unburned ceramsite in water was 3.66%, the water absorption rate was 31.76%, the specific surface area was 17.837 m2/g, the total pore volume was 0.058 25 cm3/g, the pore diameter was 3.920 nm, and the breakage rate was 0.35%, The mud content is 0.5%. the apparent density is 1 000-1 200 kg/m3. The UCWTR prepared in this experiment has good performance and can be used as a ceramsite filter material in water treatment.
The UCWTR was prepared using water treatment residuals with some auxiliary materials. The orthogonal test method is used to determine the various raw materials by using the parameters of strength, water absorption and specific surface area as indicators. The results show that the optimum amount of raw materials is WTR 60%, cement 15%, additive 20%, 5% activator, 2% sodium silicate, and 30～35 mL water. At this time, the disintegration rate of WTR unburned ceramsite in water was 3.66%, the water absorption rate was 31.76%, the specific surface area was 17.837 m2/g, the total pore volume was 0.058 25 cm3/g, the pore diameter was 3.920 nm, and the breakage rate was 0.35%, The mud content is 0.5%. the apparent density is 1 000-1 200 kg/m3. The UCWTR prepared in this experiment has good performance and can be used as a ceramsite filter material in water treatment.
引文
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[2]WANG C H,YUAN N N,PEI Y S.Effect of pH on metal lability in drinking water treatment residuals[J].Journal of Environmental Quality,2014,43(1):389-397.
[3]LI X Q,CUI J,PEI Y S.Granulation of drinking water treatment residuals as applicable media for phosphorusremoval[J].Journal of Environmental Management,2018,213:36.
[4]BABATUNDE A O,ZHAO Y Q,YANG Y,et al.Reuse of dewatered aluminium-coagulated water treatment residual to immobilize phosphorus:Batch and column trials using a condensed phosphate[J].Chemical Engineering Journal,2008,136(2/3):108-115
[5]SUN F,HU W,PEI H,et al.Evaluation on the dewatering process of cyanobacteria-containing AlCl3,and PACl drinking water sludge[J].Separation&Purification Technology,2015,150:52-62.
[6]潘艳秋.给水厂废水污泥回收处理技术研究[D].长春:东北师范大学,2009.
[7]孟盼盼.陶粒基人工湿地处理生活污水及新型陶粒的开发研究[D].济南:山东大学,2015.
[8]王乐乐,杨鼎宜,刘亚东,等.轻质污泥陶粒研制及其膨胀机理的探讨[J].混凝土,2013(4):40-43.
[9]吴小缓,廖述聪,何仕均,等.水处理用陶粒滤料的研究现状[J].粉煤灰综合利用,2015(3):49-52.
[10]任新,王嘉琦,郭明晴,等.利用城市给水厂污泥制备陶粒及其吸附去除水中Cr6+的研究[J].吉林师范大学学报(自然科学版),2017,38(4):113-118.
[11]王伟卓.钢渣给水污泥陶粒-PRB材料修复铜、铅污染研究[D].长春:吉林大学,2017.
[12]陈洋.给水厂污泥陶粒的制备及其在废水除磷中应用的研究[D].济南:山东大学,2017.
[13]张凡,欧阳平,张贤明,等.粉煤灰改性及其吸附应用研究进展[J].应用化工,2016,45(4):747-750.
[14]李猛.新型免烧陶粒的制备及其对生活污水处理的研究[D].青岛:青岛理工大学,2010.
[15]邱珊.陶粒性能指标评价体系建立及净水效能研究[D].哈尔滨:哈尔滨工业大学,2006.
[16]CJ/T 299-2008水处理用人工陶粒滤料[S].
[17]刘芷华.利用钢渣制备免烧陶粒的研究[C]//中国环境科学学会学术年会论文集(2014).北京:中国环境科学出版社,2014:5696-5703.
[18]肖建敏,李辉,朱绘美,等.利用红外和核磁技术分析矿渣硅酸盐复合胶凝材料的水化产物[J].材料科学与工程学报,2018(4):644-649,630.
[19]IPPOLITO J A,SCHECKEL K G,BARBARICK K A.Selenium adsorption to aluminum-based water treatment residuals[J].Journal of Colloid and Interface Science,2009,338(1):48-55
[20]朱宏伟,于涛,郭志鹏,等.新型给水污泥-粉煤灰陶粒性能与除磷效果[J].环境工程学报,2018,12(10):2741-2750.