| Abstrak/Abstract |
he existence of the heavy metal such as Mn in water was not desired because could be toxic to human life. Soils can be used as filtered, absorbed or exchanger the heavy metal on the sewage. This research was study the ability of Andisol in reducing Mn of sewage sludge, so the water can be used to irrigate plants.A greenhouse experiment in pots was carried out in order to assess the effect of combination of treated waste water and dose of poultry manure on the bioavailability of heavy metal Mn in contaminated soils and its uptake from agricultural plants. Water spinach(Ipomeaaquatica L.)plants were grown. Soil samples were analyzed for determination the content of elements: Mnand other soil chemical properties.Concentration of the Mnwas measured in the leavesand roots of investigated plants, after the harvesting. The research was used Completely Randomized Design with two factor. The first factor was irrigated by treated wastewater folowedby Andisol and untreated wastewaterirrigated. The second factor was the poultry manure doses: 0%, 5%, 10%, 15%, 20%of the soil weight. The result showed that treated wastewater by slow-sand followed by Andisol filtered reduced BOD, COD, suspended solid, Mn and Fe concentration in wastewater. Treated wastewater by slow-sand followed by Andisol filtered decreased plants height, fresh and dry weight biomass of water spinach. Water spinach irrigated by untreated and treated waste water tended have high level Mn on leaves and roots, but still below the levels which can be toxic to the plants. A higher concentration ofMnwas established in the roots of Ipomea, compared to those, in the leaves. |
