改性凹凸棒除磷效果特性研究
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摘要
针对城市内河水体中的磷污染,以凹凸棒作为原材料,利用碱性氧化物经煅烧后获得碱改性凹凸棒吸附材料;并通过单因素实验、动力学实验和等温吸附实验进行了碱改性凹凸棒的除磷效果验证试验,并进行机理分析。结果表明:凹凸棒在改性后,吸附除磷效果明显提高;单因素实验表明,在总磷浓度为50mg/L,改性凹凸棒投加0.25 mg/L,温度为30℃,在偏酸性条件下,总磷去除率可以达到95%以上,并且碱改性凹凸棒对于总磷的最大平衡吸附量在26.4mg:/g左右;动力学实验结果表明,改性后凹凸棒吸附总磷的过程更加符合准二级动力学方程,表明整个吸附过程是涵盖了液膜扩散、表面吸附和内孔道扩散等多种吸附过程的复杂过程;等温吸附试验拟合结果数据表明,改性凹凸棒吸附除磷过程更加符合Freundlich方程模型,并且从参数不规则性分析得出,温度对于改性的凹凸棒吸附除磷过程并不是决定性的因素。
引文
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[2]HEFTING M,KARSSENBERG D,BELTMAN B.Water quality dynamics and hydrology in nitrate loaded riparian zones in the Netherlands[J].Environmental Pollution,2006,139(1):143-156.
[3]刘溪,严向军,汪成伟,等.城市黑臭河道快速处理技术研究[J].西南给排水,2015,37(2):13-19.
[4]周成,杨国录,陆晶,等.河湖底泥污染物释放影响因素及底泥处理的研究进展[J].环境工程,2016,(5):113-117.
[5]VRUGT J A,GUPTA H V,BASTIDAS L A.Vrugt J A,Gupta H V,Bastidas L A,et al.Effective and Efficient Algorithm for Multiobjective Optimization of Hydrologic Models[J].Water Resources Research,2003,39(8):SWC 5-1[J].Water Resources Research,2003,39(8):SWC 1-SWC 5.
[6]CHEE Y E.An ecological perspective on the valuation of ecosystem services[J].Biological Conservation,2004,120(4):549-565.
[7]SCHAFFNER M,BADER H P,SCHEIDEGGER R.Modeling the contribution of point sources and non-point sources to Thachin River water pollution[J].Science of the Total Environment,2009,407(17):4902-4915.
[8]SCHNEEWEISS M A,KRAMER D.Electrochemistry and structure of the isomers of aminothiophenol adsorbed on gold[J].Journal of Electroanalytical Chemistry,2000,491(1-2):55-68.
[9]JING You,FENG Chen,ZHAO Xiao-bing,et al.Preparation,characterization and catalytic oxidation property of CeO_2/Cu~(2+)-attapulgite(ATP)nanocomposites[J].Journal of Rare Earths,2010,28(SI):347-352.
[10]SHI Xing-min,ZHANG Guan-jun,YUAN Yu-kang,et al.Recovery of N and P from human urine by freezing,struvite precipitation and adsorption to zeolite and active carbon[J].Bioresource Technology,2007,98(16):3112-3121.
[11]张靖.凹凸棒土处理含铅废水与高氟水的吸附热力学及机理研究[D].北京:北京大学,2008.
[12]王家宏,刘少冲.热处理凹凸棒土去除水体中单宁酸的研究[J].陕西科技大学学报,2015,33(1):25-29.
[13]WANG J,HAN X,MA H,et al.Adsorptive removal of humic acid from aqueous solution on polyaniline/attapulgite composite[J].Chemical Engineering Journal,2011,173(1):171-177.
[14]谢晶晶,邢波波,陈天虎,等.不同矿石类型凹凸棒石黏土热处理后对磷的吸附性能[J].硅酸盐学报,2014,42(5):683-687.
[15]陈琳荔,邹华.改性麦饭石对水中氮磷的去除[J].食品与生物技术学报,2015,34(3):283-290.
[16]马啸宙,霍春雪,伍高燕.铁沉淀法改性给水污泥除磷特性研究[C]//中国环境科学学会学术年会,2015:3861-3867.
[17]BABATUNDE A O,ZHAO Y-q,BURKE A M.Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands[J].Environmental Pollution,2009,157(10):2830-2836.
[18]陈天虎,史晓莉,彭书传,等.水悬浮体系中凹凸棒石与Cu~(2+)作用机理[J].高校地质学报,2004,10(3):385-392.
[19]LAZAREVI S,JANKOVI-ASTVAN I,JOVANOVI D,etal.Adsorption of Pb~(2+),Cd~(2+)and Sr~(2+)ions onto natural and acid-activated sepiolites[J].Applied Clay Science,2007,37(1-2):47-57.
[20]黄卓楠,窦树梅,杜鹃.磁化凹凸棒土对废水中Cr~(2-)的吸附及应用研究[J].科学技术与工程,2015,15(13):108-113.
[21]刘玉真,成杰民.Cu~(2+)和Zn~(2+)在太湖沉积物上的吸附及竞争吸附研究[J].安徽农业科学,2010,38(3):1405-1407.
[22]BLANCO D A,GIRALDO L,MORENO J C.Application of the dubinin-radushkevich-kaganer equation in the catechol,resorcinol and hydroquinone adsorption from aqueous solutions on activated carbon[J].Revista Colombian DE Quimica,2010,39(2):237-246.
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