Optimizing the Formulation of Engineering Slag Using Modified Organic Materials and Microbial Inoculants

Bibliographic Data

ID21647734
AuthorsYuxin Zou (0009-0004-7348-0057, College of Ecological Environment, Chengdu University of Technology Chengdu China), Qi Li (0000-0003-3042-3584, College of Ecological Environment, Chengdu University of Technology Chengdu China), Ningfei Lei (0009-0000-8444-0959, College of Ecological Environment, Chengdu University of Technology Chengdu China, corresponding author), Xiangjun Pei (0000-0003-0790-4099, College of Ecological Environment, Chengdu University of Technology Chengdu China, corresponding author), Peng Du (0000-0002-6576-3741, College of Ecological Environment, Chengdu University of Technology Chengdu China), Rui Lei (0000-0002-9866-2568, College of Ecological Environment, Chengdu University of Technology Chengdu China), Xiaochao Zhang (0000-0002-9092-4922, College of Ecological Environment, Chengdu University of Technology Chengdu China), Weibiao Zhang (College of Ecological Environment, Chengdu University of Technology Chengdu China), Wei Li (0000-0002-3581-849X, Chengdu University of Information Technology), Xiaowei Li (0000-0001-6947-4448, College of Ecological Environment, Chengdu University of Technology Chengdu China)
Year2025
Volume36
Issue18
Pages6341-6352
Publication date2025-12-01
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.70073
OpenAlexW4412900400
LanguageEN
References cited72

As China's urbanization grows by leaps and bounds, engineering slag has turned into one of the broadest forms of solid wastes. The purpose of this research was to utilize engineering slag as a new planting substrate component to improve the soil environment in mine sites and address the growing shortage of land resources. The substrate optimal formulation was filtrated utilizing an orthogonal experiment involving four factors: slow‐release fertilizer (SRF), microbial inoculants (MI), water‐retaining polymer (WRP), and soil‐to‐slag ratio (SS). The results presented that SRF significantly increased the nutrients availability of the slag substrate. The addition of MI induced changes in the physicochemical properties of the substrate, ultimately affecting plant germination. Furthermore, at a concentration of 0.8%, WRP had a significant effect on the physical properties and soil dehydrogenase (S‐DH). However, 1% WRP was most favorable for plant growth. Exogenous soil significantly improved SOC content and soil alkaline phosphatase (S‐ALP) activity when applied at a dosage of 500 g. There existed significant correlations between soil properties and plant indicators. Afterwards, we comprehensively analyzed the effects of 20 parameters, and from an economic perspective, the optimal parameters were as follows: SRF content of 1 g kg −1 , MI content of 90 mL kg −1 , WRP concentration of 1.0%, and SS of 30:70. Additionally, amplicon sequencing showed a positive impact on soil microbial community diversity due to the treatment. The results of this research will establish a theoretical foundation on combining microbial inoculants with guest soil filling techniques limestone quarries ecological restoration

Bacteria · Biochemical engineering · Metallurgy · Microbial inoculant · Process engineering · Waste management · Engineering · Environmental Science · Materials Science · Plant Growth Enhancement Techniques · Polymer-Based Agricultural Enhancements · Soil Carbon and Nitrogen Dynamics · Geology

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