Biochar amendment for reducing the environmental impacts of reclaimed polluted sediments

• DOI: 10.1016/j.jenvman.2023.118623
• Publication Date: 2023-07-22T04:41:21Z
• Authors: Dario Liberati; Syed Wasif Ahmed; Nafeesa Samad; Roberta Mugnaioni; Sundas Shaukat; Muhammad Muddasir; Sara Marinari; Paolo De Angelis
• Keywords: Amendment

Dredging activities produce large amounts of polluted sediments that require adequate management strategies. Sediment reuse and relocation can involve several environmental issues, such as the release CO2 nitrogen compounds in environment, transfer metals to plant tissues persistence phytotoxic compounds. In this framework, aim present work is evaluate use biochar at different doses, combination with growth, reduce impacts dredged sediments. Irrespective treatment, amendment sediment lowest dose (3%) reduced by 25% emissions substrate, 89% substrate carbon loss 35% amount released into environment (average values three treatments). The negative priming effect on organic matter mineralization be responsible for beneficial reduction environment. lack similar effects observed higher doses depend low albedo particles, causing warming (+1 °C highest dose) accelerating mineralization. Finally, shrub growth 3% was able offset emission lost. This provides new insight potential benefit related matter-rich sediments, suggesting moderate wood plantation