Boron and transparent exopolymer particles (TEP) in seawater presented two hurdles in desalination as the former can pass through reverse osmosis easily and the latter can induce membrane biofouling. Chemical oxo-precipitation (COP) was evaluated and its feasibility of boron removal in seawater during normal conditions and high turbidity caused by a typhoon. Various COP conditions in seawater were conducted by a series of jar tests for seawater sampled from an intake of desalination pilot plant. Both boron concentrations in upper liquids using FeCl₃ or BaCl₂ as coagulant were found increased linearly with increasing oxidant amounts after addition of H₂O₂ as an oxidant. However, colloidal TEP and particle analysis by nanoparticle tracking analysis provided more insights of the aggregated sizes. Effects of three COP operational parameters on the removal of boron and TEP as well as turbidity were investigated and optimized by a response surface methodology via Box–Behnken design. These results provide a good reference in design feasible pre-treatment dealing with the two current hurdles of seawater RO systems.

海水中的硼和透明外聚合物颗粒（TEP）在脱盐方面存在两个障碍，因为前者可以轻松通过反渗透，而后者则可以引起膜生物污染。评估了化学氧-沉淀（COP）及其在正常条件下以及由台风引起的高浊度下海水中除硼的可行性。通过一系列罐测试对海水中各种COP条件进行了一系列罐测试，以对从海水淡化中试厂的进水口采样的海水进行采样。发现在添加H ₂ O ₂后，以FeCl ₃或BaCl ₂为凝结剂的上部液体中的硼浓度均随氧化剂量的增加而线性增加。作为氧化剂。但是，胶体TEP和通过纳米颗粒跟踪分析进行的颗粒分析提供了更多有关聚集大小的见解。通过Box–Behnken设计的响应面方法，研究并优化了三个COP操作参数对硼和TEP去除以及浊度的影响。这些结果为设计可行的预处理方案提供了很好的参考，可以解决当前海水反渗透系统的两个障碍。