AlCl_(3)与Al_(13)对不同HA浓度含氟废水的处理效果及作用机理  

Treatment effect and mechanism of treatment of fluorine-containing wastewater with different HA concentrations by AlCl_(3) and Al_(13)

作　　者：吴福雨 王涛 程紫微 李能能 张龙 樊小东 马龙 郭忠 徐慧 段淑璇 WU Fuyu;WANG Tao;CHENG Ziwei;LI Nengneng;ZHANG Long;FAN Xiaodong;MA Long;GUO Zhong;XU Hui;DUAN Shuxuan(Ningxia Great Wall Water Co.,Ltd.,Yinchuan 750000,China;Yangtze River Delta Research Center for EcoEnvironmental Sciences,Jinhua 321000,China;Yunnan Design Institute Group Co.,Ltd.,Yunnan 650000,China)

机构地区：[1]宁夏长城水务有限责任公司,银川750000 [2]长三角(义乌)生态环境研究中心,金华321000 [3]云南省设计院集团有限公司,昆明650000

出　　处：《环境工程学报》2023年第4期1188-1197,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金重点资助项目(52030003)。

摘　　要：混凝是一种重要的除氟工艺。以不同腐殖质(HA)浓度的含氟废水为研究对象,对比高正电性分子[AlO_(4)Al_(12)(OH)_(24)(H_(2)O)_(12)]^(7+)(Al_(13))和氯化铝(AlCl_(3))2种不同形态混凝剂的除氟效果。结果表明,在纯氟水中,增加混凝剂投加量,除氟率均为先升高后下降,而在HA存在的条件时,混凝剂的除氟效果是氟和有机物的竞争作用与三元络合促进作用在动态平衡下的结果。氟离子和有机物混合废水中的氟离子能够促使有机质中酚羟基与Al_(13)的络合。Al_(13)在混凝过程中会形成三元络合物,促使氟离子脱离水相,因此,除氟效果更好。当溶解性有机碳质量浓度为5 mg·L^(-1)时,Al13的最高除氟率可达88.8%。Coagulation is an important fluoride removal process.In this study,fluorine-containing wastewater with different HA concentrations was taken as the research object,and the fluoride removal effects by high positive molecular[AlO_(4)Al_(12)(OH)_(24)(H_(2)O)_(12)]^(7+)(Al_(13))and aluminum chloride(AlCl3)were compared.The results showed that in pure fluorine water,with the increase of coagulant dosage,the fluoride removal rate increased at first and then decreased;while in the presence of HA,the fluoride removal effect of coagulants was the result of the competition between fluorine and organic matter and the promotion of ternary complexation under dynamic equilibrium.The fluoride ion in the mixed wastewater of fluoride ion and organic matter could promote the complexation of phenolic hydroxyl groups in organic matter with Al_(13).In the process of coagulation,Al_(13) could form a ternary complex to promote the separation of fluoride from the aqueous phase,so it had a better fluoride removal effect.When the mass concentration of dissolved organic carbon was 5 mg·L^(-1),the highest fluoride removal rate of Al_(13) reached 88.8%.

关 键 词：AlCl_(3) Al_(13) 混合废水 混凝 除氟 

分 类 号：X703[环境科学与工程—环境工程]