硫酸铝渣去除水中磷研究  

Experimental studying on phosphorus removal from water by aluminum sulfate residue

作　　者：姜雅婧[1] 丛海兵 黄廷林[3] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127 [2]扬州大学江苏省环境材料与环境工程重点实验室,江苏扬州225127 [3]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《环境污染与防治》2011年第11期29-33,38,共6页Environmental Pollution & Control

基　　金：江苏省高校自然科学基础研究项目(No.08KJB610008)

摘　　要：分别以蒸馏水和太湖水为例,研究了硫酸铝渣去除水中磷的能力,并分析了其对水体Al3+、SO42-以及pH的影响。结果表明:(1)除太湖水pH为9.0、10.0两种条件外,随着磷平衡浓度的增加,硫酸铝渣除磷量趋于某一定值,其规律符合Langmuir吸附等温式;太湖水pH为9.0、10.0两种条件下,硫酸铝渣除磷量符合Freundlich吸附等温式。(2)随着pH的增加,硫酸铝渣最大除磷量逐渐减少;当pH为6～8时,蒸馏水、太湖水最大除磷量分别达到2.92～3.41、2.41～3.08mg/g。(3)在每组等温实验结束时,Al3+基本未检出;蒸馏水、太湖水中SO42-溶出量折合成单位质量硫酸铝渣的SO24-溶出量分别为0.09～0.37、0.24～0.37mmol/g。(4)当水渣比≥2 000(质量比)时不会引起太湖水pH的降低。240mL碱度为8.73mmol/L(以HCO3-计,下同)太湖水水样中加入0.50g硫酸铝渣振荡后,碱度降低了4.00mmol/L,则单位质量硫酸铝渣消耗的水体碱度为1.92mmol/g。The capacity of aluminum sulfate residue for phosphorus removal from aqueous solution,with water and Taihu lake water respectively as examples,was investigated,and the influence of aluminum sulfate residue on Al3＋,SO2-4 concentration and pH of water were discussed.The adsorption capacity of aluminum sulfate residue for phosphorus was tended to a fixed value;the experimental data were well described by the Langmuir adsorption equation,except in Taihu lake water at pH of 9.0 and 10.0.While,adsorption capacity data obtained in Taihu lake water at pH of 9.0 and 10.0 was better fitted by Freundlich adsorption equation.The maximum adsorption capacity was decreased with increasing the solution pH,when solution pH ranged 6-8,the maximum phosphorus removal quantity in distilled water and Taihu lake water was 2.92-3.41,2.41-3.08 mg/g respectively.There was no Al3＋ detected in water after isothermal adsorption experiments,the SO2-4 dissolution quantity of aluminum sulfate residue in distilled water and Taihu lake water was 0.09-0.37,0.24-0.37 mmol/g.Aluminum sulfate residue could not decrease the pH of Taihu lake water when water to residue ratio ≥2 000.Adding 0.50 g of aluminum sulfate residue to 240 mL Taihu lake water samples,the alkalinity of water sample decreased from 8.73 mmol/L to 4.73 mmol/L,given the alkalinity consumes quantity of 1.92 mmol/g.

关 键 词：硫酸铝渣 磷 PH 等温线 

分 类 号：X52[环境科学与工程—环境工程]