摘要
采用微波混凝技术处理甲基橙模拟偶氮染料废水,对比Fe2(SO4)3、AlCl3、CaCl2、PAC四种混凝剂在有无微波作用条件下,对甲基橙模拟废水的色度去除率效果,表明Fe2(SO4)3的效果最佳,可提高21.4%。重点考察了微波强化混凝剂Fe2(SO4)3,在不同因素,如微波功率、微波辐射时间、pH值、Fe2(SO4)3的投加量对甲基橙脱色率的影响。结果表明:在溶液pH值为7.0,微波功率为539 W,微波时间300 s,Fe2(SO4)3的投加量为600 mg/L时,甲基橙的脱色率可达到95.5%。同时,用电镜扫描技术对混凝絮体进行分析,发现微波可以改变絮体形态,使絮体更大,更密实,且显著加快絮体的沉降速度。
Treatment of methyl orange using coagulation with the assistant of microwave was investigated in order to study the influencing factors such as microwave power,microwave irradiation time,pH of initial solution and dosage of Fe2（SO4）3.Comparison of 4 coagulants such as Fe2（SO4）3,AlCl3,CaCl2 and PAC with microwave and without microwave in-dicated that Fe2（SO4）3 performed the best with 21.4% increase in removal rate.Under the condition of microwave power 539 W,microwave irradiation time 300 s,pH of initial solution 7.0 and dosage of Fe2（SO4）3 600 mg/L,removal rate of methyl orange reached to 95.5%.According to the results of SEM,microwave irradiation could change the shape of flocs,which was thicker and denser and significantly accelerated the velocity of floc settling.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第4期168-171,共4页
Environmental Science & Technology
关键词
波
混凝
甲基橙
废水处理
microwave
coagulation
methyl orange
wastewater treatment
