Water is scarce and there is a high demand for water usage at different parts of domestic usage (9%), agriculture (70%) and industries (21%). The halides in natural and sea waters are typically of a ration of Cl: Br: I is 100-200:10:1, which means chloride is 10-20 times more than bromide and bromide is 10 times of iodide. Excessive halides-release into the water could be as a result of natural or human activities, for example, mining and produced waters from oil and gas industries could release a high level of halides in water. Removal of excessive amount of halides is crucial for human and living creatures. High chloride concentration could lead to destruction to aquatic lives (as indicated by A. maculatum and R. sylvatica), phytotoxicity, crop damage, corrosion of pipes, and other infrastructures (such as reduced electrode lifetime in hydrometallurgy). Iodide/iodine has some radioactive isotopes and contributed to the environmental disasters during the Chernobyl and Fukushima catastrophes. However, iodide and bromide even at very low concentrations also could bring up problems in health issues such as producing disinfection by-products (DBPs) during water treatment. More than 600 species of DBPs could be produced in the chlorination disinfections process, and some of the DBPs are known to be very toxic and their levels in water are so restricted. For example, Environmental Protection Agency (EPA) has set limitations for chloroform and bromodichloromethane at 80 and 60 ppb, respectively. The best way to avoid DBPs production is to remove the excessive amount of halides before application of any kind of oxidation for water treatment. This thesis is focused on removal of Cl-, Br- and I- ions in water. F- is excluded because F- is much easier to precipitate out in comparison to the other three halide anions. Two types of novel bismuth-based materials have been developed for removal of halides at high concentrations (> 1000 mg/L) and low concentrations (< 10 mg/L), respectively. The high concentration halide removal addresses issues in mining industry, whilst the low concentration removal addresses the issue of drinking water quality.