不同沸石材料对沼液中磷素静态吸附去除  

Static adsorption characteristics and removal efficiency of phosphate in biogas slurry by different zeolite substrates

作　　者：邢赜[1,2] 陈玉成[1,2] 熊佰炼[1,2] 孙晓东 孙晓静 

机构地区：[1]西南大学资源环境学院,重庆400716 [2]重庆市农业资源与环境研究重点实验室,重庆400716 [3]山西省运城市奥新纳米新科技有限公司,运城044000

出　　处：《环境工程学报》2013年第2期494-500,共7页Chinese Journal of Environmental Engineering

基　　金：国家"十一五"科技支撑计划(2010BAD03B03)

摘　　要：集中型沼液磷含量较高,处理不当极易造成二次污染。为了寻找高效磷吸附基质,以天然斜发沸石(TRF)、微波与氯化钠联合改性沸石(WLF)、CPB改性沸石(CPBF)、微米级(WF)及亚微米级(YWF)2种粉煤灰合成沸石为研究对象,对磷的热力学吸附解吸以及动力学进行研究,并对影响沼液中磷吸附的温度,沸石投加量、pH等因素进行探讨。结果表明,在投加量为10 g/100 mL时,TRF、WLF、CPBF、YWF、WF 5种沸石材料对实际沼液磷去除率分别达到24.24%、22.45%、28.56%、48.63%、40.22%;在15～35℃范围内,温度的升高有利于除CPBF以外的其他4种沸石材料对沼液磷的吸附;在pH从3.5～10.5的变化范围内,YWF、WF对沼液磷的吸附量变化幅度要大于其他沸石材料。与其他3种沸石材料相比,2种粉煤灰合成沸石具有更高的磷吸附量和吸附速率以及更低的解吸率,因此具有较大的沼液除磷优势,是优良的吸附材料。The phosphate content was high in concentric biogas slurry which would cause secondary pollution if improperly disposed. To search for excellent phosphate adsorption substrates, both the thermo-dynamics adsorption-desorption characteristics of phosphate by five common substrates （ natural zeolite （TRF） , microwavesodium chloride modified zeolite （WLF）, cetylpyridinium bromize modified zeolite （CPBF）, micro-sized zeolite （WF） and submicro-sized zeolite （YWF）synthesized from coal fly ash） and influence factors such as temperature, dosing quantity,pH which could affect the adsorption of phosphate in biogas slurry were illustrated in laboratory. The results indicated that phosphate removal efficiencies of biogas slurry had reached at 24. 24%, 22.45% ,28.56% ,48.63% ,40.22% by TRF, WLF, CPBF, YWF, WF, respectively with dosing quantity as 10 g/100 mL. In the range of 15- 35℃ ,temperature rising was beneficial for adsorption of phosphate in biogas slurry by zeolite substrates except for CPBF. The variation of adsorption of phosphate in biogas slurry by WF and YWF was larger than that of the other zeolite substrates when pH value ranged from 3.5 to 10.5. Both WF and YWF had higher adsorption capacities and velocities of phosphorus and lower phosphorus desorption efficiencies than other zeolite substrates which means they could be excellent phosphate adsorption substrates.

关 键 词：沼液 磷 沸石 吸附 解吸 

分 类 号：X524[环境科学与工程—环境工程]