Because of this, the ecology of the wetland (soil components, water, vegetation, microbes, sunlight processes, etc.) becomes the primary system to remove pollutants. Water in an artificial wetland tends to be filtered slowly in comparison to systems with mechanized or explicitly engineered components.
The wetland's ecosystem (soil components, water, vegetation, microbes, and sunlight processes) is the primary system for removing pollutants. In contrast, water purification in artificial wetlands occurs more slowly than in systems with mechanized or explicitly engineered features.