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A Review on the Control of Agricultural Non-Point Source Pollution Through Constructed Wetlands
This review examined the performance of constructed wetlands in N and P removal through various published peer-reviewed articles. The performance of constructed wetlands in removing pollutants varies among countries. The removal mechanisms of N and P are discussed. The impact factors influencing the performance — including temperature, vegetation, hydraulic residence time, etc. — are also explored.
In general, constructed wetlands would be more effective in regions with higher temperature and vegetation with larger root biomass. Future studies should focus more on improving the performance of constructed wetlands in colder areas and other more detailed parameters, such as specific beneficial microbes.