Potassium in silicon‐rich biomass wastes: A perspective of slow‐release potassium sources

Biofuels, Bioproducts and Biorefining - Tập 16 Số 5 - Trang 1159-1164 - 2022
Hue Thi Nguyen1,2, Anh T.Q. Nguyễn1,3, Trang Vu1, Lim Thi Duong2, Minh N. Nguyen1
1Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, 10000, Hanoi, 334 Nguyen Trai, Thanh Xuan, Vietnam
2Institute of Geography, Vietnam Academy of Science and Technology, 10000, Hanoi, 8 Hoang Quoc Viet, Vietnam
3Hanoi University of Natural Resources and Environment, 10000, Hanoi, 41 A Phu Dien, North-Tu Liem, Vietnam

Tóm tắt

AbstractMany plant species that are known as silicon (Si) accumulators can form a so‐called phytolith (silicified structure) within their organs. Together with organic matter, potassium (K) has also been found in phytolith structures (phytK). Annually, billions of tons of Si‐rich biomass wastes are cycled in agricultural and natural systems worldwide. However, the fate of the phytolith and its phytK have not been fully understood. This study aims to examine the dynamic release of phytK from phytoliths of reed, rice straw, maize and sugarcane leaf samples. Phytoliths obtained from the biomasses by performing heat treatment at 600 °C were used for batch kinetic experiments. The phytK was found to have 26.3 ± 10.6, 98.9 ± 17.4, 24.9 ± 14.8 and 58.8 ± 13.9 mg Kg−1 for the reed, rice straw, sugarcane and maize leaves, respectively. These phytK amounts comprised at least >45% of the total K budgets in the biomasses and they were observed to be gradually released with time. The retardation of phytK was tightly related to the dissolution rate of phytoliths. The findings highlight that phytoliths carry certain amounts of K, potentially serving as a slow‐release K source for soil and crops. Additionally, this short communication suggests a premise for the development of refinery strategies or extending the range of agronomic options for billions of tons of Si‐rich biomass wastes worldwide. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd

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Thông tin
: 12785069281078353198
Thông tin xuất bản

Biofuels, Bioproducts and Biorefining

Tập 16 Số 5

1159-1164

Thông tin tác giả