Fresh sediments intended for road construction (labeled "Fresh sediment) AND Sediments previously treated by Agriport phyto-tecnology (use of organic matter and plants for sediment decontamination and recovery) to be reused in nursery activities (labeled "Agriport sediment") were submitted to landfarming process. 1) Fresh sediments for road construction After about two months of landfarming, sediments were taken in the same 8 sampling points (starting characterization) and analysed again to verify if the sediments had reached the idoneous characteristics to be used in road construction, and /or if they needed a further treatment (post-treatment). On the basis of the preliminary results, and in particular due to the too high water and organic matter content, a longer period of landfarming treatment (two-three months more) has been planned. 2) Agriport sediment for nursery activities The Agriport sediments were collected every month during the landfarming treatment and analyzed from their chemical-biological and toxicological point of view. The results of two months landfarming showed a significant stimulation of the microbial activity but the presence of a quite low content in macro and micro nutrients resulted poorly adequate for plant growth and development. The microbial stimulation caused a further, even if small, significant reduction in the organic contaminant concentration. Moreover, the absence of toxicity in the sediments, already observed in the first characterization sampling, were confirmed also at the end of the landfarming process as well as the heavy metal content averagelly not dangerous for plant life and growth. Therefore, on the basis of chemical-biological characteristics at the end of landfarming process, it will be useful to mix the treated sediments with an organic matrix (vegetal residues, compost, soil) able to increase nutrient content, aeration and water holding capacity, making the sediments suitable for their reuse in nursery activity.
Sediment characterization reports (chemical, biological, nato etc)
Grazia Masciandaro;Cristina Macci;Giorgio Poggio
2014
Abstract
Fresh sediments intended for road construction (labeled "Fresh sediment) AND Sediments previously treated by Agriport phyto-tecnology (use of organic matter and plants for sediment decontamination and recovery) to be reused in nursery activities (labeled "Agriport sediment") were submitted to landfarming process. 1) Fresh sediments for road construction After about two months of landfarming, sediments were taken in the same 8 sampling points (starting characterization) and analysed again to verify if the sediments had reached the idoneous characteristics to be used in road construction, and /or if they needed a further treatment (post-treatment). On the basis of the preliminary results, and in particular due to the too high water and organic matter content, a longer period of landfarming treatment (two-three months more) has been planned. 2) Agriport sediment for nursery activities The Agriport sediments were collected every month during the landfarming treatment and analyzed from their chemical-biological and toxicological point of view. The results of two months landfarming showed a significant stimulation of the microbial activity but the presence of a quite low content in macro and micro nutrients resulted poorly adequate for plant growth and development. The microbial stimulation caused a further, even if small, significant reduction in the organic contaminant concentration. Moreover, the absence of toxicity in the sediments, already observed in the first characterization sampling, were confirmed also at the end of the landfarming process as well as the heavy metal content averagelly not dangerous for plant life and growth. Therefore, on the basis of chemical-biological characteristics at the end of landfarming process, it will be useful to mix the treated sediments with an organic matrix (vegetal residues, compost, soil) able to increase nutrient content, aeration and water holding capacity, making the sediments suitable for their reuse in nursery activity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
