MFPAC强化混凝-改性矿化垃圾吸附处理垃圾渗滤液  

Nano- Fe_3O_4 enhanced coagulation of landfill leachate in combination with aged-refuse adsorption pretreatment

作　　者：刘占孟[1] 刘荣荣[1] 聂发辉[1] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013

出　　处：《现代化工》2016年第5期126-129,共4页Modern Chemical Industry

基　　金：国家自然科学基金(51468016);国家科技支撑项目(2014BAC04B03);江西省自然科学基金(20142BAB203027);江西省科技支撑计划(20151BBG70020)

摘　　要：采用纳米Fe_3O_4与聚合氯化铝(PAC)复配制备磁性复合絮凝剂MFPAC,利用MFPAC强化混凝-改性矿化垃圾吸附处理垃圾渗滤液。结果表明,MFPAC中适宜的前驱物质量比为m(Fe_3O_4)∶m(PAC)=1∶3,正交实验结果表明,m(Fe_3O_4)∶m(PAC)以及投药量对混凝效果有较为显著的影响,p H和沉淀时间对去除效果影响相对较小,MFPAC对COD和色度的去除效果均优于单独投加PAC,投加量为1.5 g/L时,COD和色度去除率分别达到62.6%和66.5%;采用焙烧法对矿化垃圾进行改性,利用改性矿化垃圾吸附MFPAC混凝出水,在焙烧温度为700℃,吸附剂投加量为40 mg/L的条件下,COD和氨氮的去除率分别为56.7%和68.4%;MFPAC混凝-矿化垃圾吸附联合工艺对垃圾渗滤液COD、色度和氨氮的去除率分别为83.8%、78.5%和74.3%。A novel magnetic composite coagulant,MFPAC,is prepared from Fe_3O_4 nanoparticles and polyferric chloride（ PAC）. Landfill leachate is pretreated by MFPAC coagulation combined with modified aged-refuse adsorption. It is found that suitable mass ratio of precursor materials in MFPAC is 1 ∶ 3 of m（ Fe_3O_4） ∶ m（ PAC）. The orthogonal experiment results show that m（ Fe_3O_4） ∶ m（ PAC） and coagulant dosage have marked effects on the coagulation performance,while p H value and settling time have a relatively smaller effect. Higher COD and color removals are achieved by using the MFPAC magnetic coagulant than by adding PAC alone. At the dosage of 1. 5 g / L,the removal rates of COD and color reach up to 62. 6% and 66. 5%,respectively,in coagulation process. Then,the effluent of MFPAC coagulation is further treated by using the modified-aged-refuse adsorption,which leads to 56. 7% and 68. 4% of the COD and ammonia nitrogen removal rates,respectively,at 700 ℃ of roasting temperature and with 40 mg / L of adsorbent.In contrast,by using the combined process,the removal rates of COD,color and ammonia nitrogen removal rates are83. 8%,78. 5%,and 74. 3%,respectively.

关 键 词：纳米Fe_3O_4 聚合氯化铝 矿化垃圾 垃圾渗滤液 

分 类 号：X703.1[环境科学与工程—环境工程]