摘要
以Na2SiO3·9H2O，Al2（SO4）3·18H2O为原料，加入一定量稳定剂，采用复合法制备出高铝含量且稳定的聚硅硫酸铝（PASS）。研究结果表明：采用磷酸氢二钠与烷基糖苷（质量比为1：1）作为复合稳定剂，在碱化度为1．5～1．8、Ⅳ（A1）：Ⅳ（Si）=1．0～3．0的条件下，合成的PASS絮凝效果最佳；复合稳定剂对废水的COD去除率及浊度去除率影响不大，但能显著改善絮凝产品的稳定性；PASS可用于处理pH范围较宽（pH为6．0—11．0）的工业废水，且处理前后废水pH变化不大；PASS对低温低浊度废水有较好的絮凝效果；在加入量相同的情况下，PASS的絮凝性能明显优于聚合硫酸铝、硫酸铝、聚合硫酸铁，当PASS加入量为40～100恤L／L时，废水浊度去除率达98％以上。
The stable polysilicate aluminium sulphate （PASS） with high aluminium content was prepared by composite method with the addition of stabilizer, using Na2SiO3· 9H20, Al2 （SO4）3 · 18H2O as raw materials. The research results indicate that： The flocculating effect of PASS is the best under the conditions of using the mixture of disodium hydrogen phosphate and alkyl glycoside （with 1 ： 1 of mass ratio） as composite stabilizer, the basification degree 1.5 - 1.8 and n （Al） ： n （Si） = 1.0 - 3.0 ; Though the composite stabilizer has little effect on the removal rates of COD and turbidity, the stability of PASS can be improved greatly; PASS can be used in the treatment of industrial wastewaters with a wide rang of pH （6.0 - 11.0 ） and has the advantage of making little change of wastewater pH; PASS has a good flocculating effect on wastewaters with lower temperature and lower turbidity ; PASS has more better flocculating effect than poly aluminium sulfate, aluminium sulfate and poly ferric sulfate; When the dosage of PASS is 40 - 100μL/L, the turbidity removal rate can reach over 98%.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第5期477-480,共4页
Environmental Protection of Chemical Industry
关键词
聚硅硫酸铝
稳定剂
复合法
絮凝性能
polysilicate aluminium sulphate
stabilizer
composite method
flocculating effect
