硫酸钙处理含磷废水特性研究

研究工业石膏的主要成分硫酸钙对含磷废水的处理特性.讨论了废水pH、磷的初始含量、处理时间、投加量等参数对处理的影响,并对吸附等温特性进行了探讨.结果表明,硫酸钙对含磷废水具有良好的吸附作用,等温吸附特征与Langmuir方程和Temkin方程比较吻合,其吸附性能在碱性条件下较佳,初始含量对吸附影响明显,吸附规律为随着含量的增加,磷去除率逐渐减小,在磷的初始质量浓度低于20mg·L-1时,去除效果较好,可达到95%以上;随着吸附剂投加量的增加,磷去除率逐渐增大,而吸附容量逐渐减小.

STUDY ON TREATMENT OF PHOSPHORUS ON CALCIUM SULFATE

The isotherm adsorption of phosphorus on calcium sulfate which is the main component of industrial gypsum was studied. The effect of water pH, initial phosphorus concentration, treatment time , dosage of calcium sulfate was investigated. Using three adsorption isotherm equation for linear fit. The results showed that Langmuir and Temkin equation could well describe the isotherm adsorption feature, and the effect of phosphorus removal was better in alkaline condition; the initial concentration on the adsorption are obvious, with the increase in concentration, phosphorus removal rate gradually decreased, and best in low concentrations. When the initial concentration under 20 mg·L~(-1), the removal efficient can reach 95%, as the dosage of calcium sulfate increased, adsorption capacity gradually decreased, the efficiency of phosphorus removal increased.