Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 819, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.153146
Keywords
Pyroligneous acid; Bio-oil; Economic assessments; Modified starch binder; Riger-Peppas model
Categories
Funding
- National Key Research and Development Program of China [2018YFE0127000]
- Shaanxi Key Research and Development Program [2020SF-353]
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, China
- Fundamental Research Funds for the Central Universities [1610012020004_01900]
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Biochar-based slow-release fertilizers (BSRFs) are crucial for sustainable agriculture. This study developed sustained binding materials, including pyroligneous acid, bio-oil, and modified starch binder, for BSRF synthesis. The results demonstrated that using a combination of these materials led to slower release of phosphorus and the lowest cost.
Biochar-based slow-release fertilizers (BSRFs) are vital for the development of eco-friendly and sustainable agriculture. Considerable attention has been given to enhancing the efficiency of fertilizers (EEFs) by appropriate modification or binding to reduce nutrient waste and improve the slow-release effect on the growth of plants. In this study, sustained binding materials were presented for BSRF synthesis, including pyroligneous acids (PA), bio-oil (BO), and modified starch binder (MSB). The results show that the release ratio of phosphorus from PA + BO+MSB was 4.7%, 15.2%, and 21.2% slower than that of PA, BO, and MSB alone, respectively. The BSRFs were characterized by SEM, XRD, FT-IR, XPS, and EDS, and the release kinetic outcome revealed that PA + BO+MSB contributed to the formation of a satisfactory structure in the BSRFs. The MSB viscosity significantly influences the slow-release performance and accumulation of N, P, and K nutrients. Moreover, economic assessments showed that PA + BO+MSB exhibited the lowest cost.
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