初步研究表明，在水温低于27华氏度（3摄氏度）和原水浊度低于2 ntu的情况下，三氯化铁比硫酸铝更有效地去除浊度，但硫酸铝导致的水头损失发展较慢。然而，在浊度突破开始时，两种混凝剂的总堵塞水头损失大致相同。在铁铝摩尔比为3:5.6的情况下，证明了等效的水头损失发展和浊度去除。包括9个参考文献、表格、图表。

Pilot studies showed that with water temperatures < 27 degrees F (3 degrees C) and raw water turbidities < 2 ntu, ferric chloride removed turbidity more efficiently than did aluminum sulfate but that aluminum sulfate caused slower head loss development. The total clogging head loss at the onset of turbidity breakthrough, however, was approximately the same for both coagulants. Equivalent head loss development and turbidity removal were demonstrated at a molar iron-toaluminum dosage ratio of 3:5.6. Includes 9 references, tables, figures.