Batch Investigations on Phosphate Removal from Synthetic Wastewaters Using Sensor Steel Furnace Slag
Batch Investigations on Phosphate Removal from Synthetic Wastewaters Using Sensor Steel Furnace Slag
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利用传感器钢炉渣去除合成废水中磷的批量研究
DOI：
10.1166/sl.2014.3360
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
Weiying Huang
中科院分区：
文献类型：
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作者：
Wanqiu Yang;Deren Miao;Ye Li;Weiying Huang
利用感应钢炉渣（SFS）去除合成废水中的磷酸盐(P)。批量实验表明，在1 ~ 400 mg/L的浓度范围内，磷的去除率增加，在500 ~ 800 mg/L的浓度范围内，磷的去除率明显下降。在平衡pH≥8.5时，由于形成低溶解度的Ca-P沉淀，P的去除依赖于钙离子的浓度。另一方面，当平衡pH < 8.5时，P的去除以吸附过程为主。拟二级动力学模型与磷的动态吸附行为吻合良好，在初始磷浓度为400 mg/L时，最大磷去除率达到5.4 mg/g。离子强度以及Cl−、SO2−4和NO−3离子的存在对除磷效率无显著影响。然而，F−和。HCO−3显著影响P的去除。采用毒性特征浸出法和合成沉淀浸出法提取的磷解吸率均低于10%。该研究表明，传感器SFS可以作为一种有效的结合剂。从废水中隔离磷
The sensor steel furnace slag (SFS) was used to remove phosphate (P) from synthetic wastewaters. Batch experiments showed an increase in the amount of P removal in the concentrations range 1–400 mg/L followed by a noticeable decrease in the concentration range 500–800 mg/L. At equilibrium pH ≥ 8.5, the P removal is dependent on the concentration of calcium ions due to the formation of the low-solubility Ca-P precipitate. On the other hand, the P removal is dominated by the adsorption process while the equilibrium pH < 8.5. The pseudo-second order kinetic model fits well with the dynamical sorption behavior of P and the maximum P removed achieved 5.4 mg/g at the initial P concentration was 400 mg/L. The ionic strength and the presence of Cl−, SO2−4 and NO−3 ions had no significant effects on P removal efficiencies. However, the presence of F− and.HCO−3 dramatically affected the P removal. The P desorption rates, extracted by Toxicity Characteristics Leaching Procedure and Synthetic Precipitation Leaching Procedure extractants, are all below 10%. This study showed that sensor SFS could be used as an efficient binding agent for the.sequestration of P from wastewaters.