The study looked at how wastewater affects bacteria and enzymes in mangrove soils. They used trays with mangrove soils and added synthetic wastewater with different salt levels. The soils removed pollutants like metals and nutrients from the wastewater. Bacterial populations in soils getting wastewater were higher than in control soils. Enzyme activities were not affected by the wastewater. Heavy metals didn't harm bacteria in the first 10 weeks. Soils with freshwater wastewater had more bacteria and enzyme activity than those with salty wastewater. Overall, the type of wastewater and saltiness had a bigger impact on bacteria and enzymes in mangrove soils than heavy metals.