Calcium alginate (CaAlg) beads were prepared using ultrasound for use in the removal of lead from natural and wastewaters by ion exchange. Ultrasound was applied in a batch mode with an ultrasonic bath or in a flow mode using an ultrasonic clamp-on device. For comparison purposes the synthesis was performed in batch mode in the absence of the ultrasound. The beads prepared using ultrasound showed a greater ion exchange capability which could be ascribed to a larger specific surface area as a result of surface roughening induced by cavitation.

Scanning Electron Microscopy (SEM) images revealed that the roughening was in the form of corrugation for the product with the best ion exchange capability obtained in the flow process where preformed CaAlg droplets were subjected to ultrasound during the setting process. These beads performed 11% better for lead removal than those synthesized in the absence of ultrasound.

使用超声波制备藻酸钙（CaAlg）珠，用于通过离子交换从天然和废水中去除铅。使用超声波浴以分批方式施加超声波，或者使用超声波夹持装置以流动方式施加超声波。为了比较，在没有超声波的情况下以间歇模式进行合成。使用超声制备的珠粒显示出更大的离子交换能力，这归因于空化引起的表面粗糙化，从而具有更大的比表面积。

扫描电子显微镜（SEM）图像显示，对于在流动过程中获得的最佳离子交换能力的产品，其粗糙化为波纹形式，其中在凝固过程中对预先形成的CaAlg液滴进行超声处理。这些珠子的去除铅性能比没有超声时合成的珠子好11％。