Coagulation can remove over 90% of what contaminant?

Coagulation is a water treatment process that helps to remove particles and certain contaminants from water by adding coagulants that cause these contaminants to clump together (or coagulate) into larger particles, which can then be removed more easily during subsequent filtration steps.

Sodium arsenate is a specific form of arsenic, which can be effectively removed from water using coagulation methods. The process is particularly effective because coagulation can target both dissolved and particulate forms of contaminants. In the case of sodium arsenate, coagulants can effectively bind with the arsenate ions, facilitating their removal from the water supply.

The high efficiency of coagulation, often achieving over 90% removal of sodium arsenate, showcases the process's effectiveness in treating water contaminated with this particular chemical, emphasizing the importance of coagulation in ensuring safe drinking water standards.

While other options may have varying degrees of removability through coagulation, sodium arsenate's specific properties related to coagulation chemistry make it the best fit for this question.