混凝-大孔树脂联用对黑臭水体致浊有机物的去除

Removal of Turbidity-Causing Organics in the Black and Odorous Water Body by Coagulation and Macroporous Resin Adsorption

以天津某黑臭河为例,对水样中致浊有机物进行傅里叶红外光谱的表征,发现其主要成分为直链脂肪醇(酚)、茁-二酮、酰卤或氨基酸(盐),且致浊有机物对浊度的贡献率为63.53%.同时,考察了混凝、混凝与大孔树脂吸附联用对致浊有机物的去除效果.在采用聚合氯化铝(PAC)、聚硅酸铝铁(PSAF)等5种混凝剂对致浊有机物的去除对比实验中发现:PAC效果最优;混凝与树脂联用对黑臭水体中腐殖质类致浊有机物有着更加彻底的去除效果;当PAC的投药量为0.6 mg/L时,混凝-大孔树脂吸附联用对TOC、浊度的去除率分别为82.63%、96.65%.

The turbidity-causing organics in the water samples,which were collected from a black and odorous river of Tianjin,were extracted and analyzed by FT-IR spectra.The results showed that the major components of the turbiditycausing organics were linear aliphatic alcohol(or phenol),β-diketone,acid halide or amino acid(salt),and these organics contributed 63.53% of the turbidity-causing materials in the water.Meanwhile,the removal efficiency of turbiditycausing organics through coagulation and coagulation-macroporous resin adsorption were investigated,respectively.The turbidity-causing organics removal efficiency of five coagulants including polyaluminium-chloride(PAC),polysilicate aluminumferric flocculant(PSAF)et al.were also investigated,PAC showed the highest removal rate of turbidity.Compared with the single coagulation treatment process,coagulation-macroporous resin adsorption process showed much higher removal efficiency of the humus-like turbidity-causing organics,the removal rate of TOC and turbidity could reach 82.63%and 96.65%,respectively,with PAC dosage of 0.6 mg/L.