TY - JOUR
T1 - Composite film with adjustable number of layers for slow release of humic acid and soil remediation
AU - Wang, Weicong
AU - Shi, Junming
AU - Qu, Keqi
AU - Zhang, Xinrui
AU - Jiang, Wenjing
AU - Huang, Zhanhua
AU - Guo, Zhanhu
N1 - Funding Information: This work was financially supported by the National Natural Science Foundation of China (No. 32071713), the Natural Science Funds for Distinguished Young Scholars of Heilongjiang Province (No. JQ 2019C001), the National Forestry and Grassland Intellectual Property Conversion and Application Project (No. KJZXZH202102), and the Northeast Forestry University College Student Innovation Training Program Funding Project (No. 202210225091).
PY - 2023/2/1
Y1 - 2023/2/1
N2 - In this study, to improve the soil amendment performance of film materials, composite films with the adjustable number of layers and controlled slow-release time were prepared using sodium alginate (SA), chitosan (CS) and activated charcoal (AC) as raw materials. The prepared multilayer films exhibited a wide pH response range and excellent slow-release time. The cumulative release of humic acid (HA) increased from 19.87 ± 0.98% to 66.72 ± 1.06% with increasing the pH from 4.0 to 10.0 after 700 h of slow-release. In addition, after 50 d of remediation in red soil, plantation soil, and saline soil, the NH4+-N, Olsen-P, Olsen-K, and organic matter contents in the three soils were increased by 2.91–28.62 mg/kg, 46.97–70.43 mg/kg, 55.89–77.01 mg/kg, and 12.47–22.52 g/kg, respectively, and were able to provide sustained crop growth promotion effect. This study demonstrates the promising application of multilayer film in soil remediation and agricultural production.
AB - In this study, to improve the soil amendment performance of film materials, composite films with the adjustable number of layers and controlled slow-release time were prepared using sodium alginate (SA), chitosan (CS) and activated charcoal (AC) as raw materials. The prepared multilayer films exhibited a wide pH response range and excellent slow-release time. The cumulative release of humic acid (HA) increased from 19.87 ± 0.98% to 66.72 ± 1.06% with increasing the pH from 4.0 to 10.0 after 700 h of slow-release. In addition, after 50 d of remediation in red soil, plantation soil, and saline soil, the NH4+-N, Olsen-P, Olsen-K, and organic matter contents in the three soils were increased by 2.91–28.62 mg/kg, 46.97–70.43 mg/kg, 55.89–77.01 mg/kg, and 12.47–22.52 g/kg, respectively, and were able to provide sustained crop growth promotion effect. This study demonstrates the promising application of multilayer film in soil remediation and agricultural production.
KW - Layer by layer self-assembly
KW - Slow-release
KW - Sodium alginate
KW - Soil remediation
UR - http://www.scopus.com/inward/record.url?scp=85144018750&partnerID=8YFLogxK
U2 - 10.1016/j.envres.2022.114949
DO - 10.1016/j.envres.2022.114949
M3 - Article
C2 - 36495960
AN - SCOPUS:85144018750
SN - 0013-9351
VL - 218
JO - Environmental Research
JF - Environmental Research
M1 - 114949
ER -
