Wang Han, Zhao Rui, Wu Xiangci, Zhao Dan, Xue Hua, Zhang Yuxin, Dai Nan, Song Dan, Zhang Mengling, Ding Hui
School of Environment Science and Engineering, Tianjin University, Weijin Road, Tianjin 300072, China.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
Polymers (Basel). 2023 Jan 4;15(2):265. doi: 10.3390/polym15020265.
Desertification, one of the world's most pressing serious environmental problems, poses a serious threat to human survival as well as to social, economic, and political development. Nevertheless, the development of environmentally friendly sand-fixing materials is still a tremendous challenge for preventing desertification. This study developed a bio-based attapulgite copolymer (BAC) by grafting copolymerization of attapulgite, starch, sulfomethyl lignin, and biological mycelia. Water retention, anti-water erosion, and anti-wind erosion tests were conducted to assess the application performance of the BAC. Scanning electron microscopy (SEM) was then employed to determine the morphology of the attapulgite and attapulgite graft copolymer sand-fixing material (CSF). The intermolecular interactions in CSF were revealed using Fourier transform infrared spectrum (FT-IR). The role of sand-fixing materials on soil physicochemical properties and seed germination was then discussed based on the germination rate experiments, and 16S rDNA sequencing technology was used to analyze the differences in microbial communities in each sample group. The results demonstrated that the BAC not only has superior application properties and significantly increased seed germination (95%), but also promotes soil development by regulating the structure of the soil microbial community. This work provides novel insights into the design of sand-fixing material for preventing desertification while improving soil fertility.
荒漠化是世界上最紧迫的严重环境问题之一，对人类生存以及社会、经济和政治发展构成严重威胁。然而，开发环保型固沙材料对于防治荒漠化仍然是一项巨大挑战。本研究通过凹凸棒石、淀粉、磺甲基木质素和生物菌丝体的接枝共聚制备了一种生物基凹凸棒石共聚物（BAC）。进行了保水、抗水蚀和风蚀试验，以评估BAC的应用性能。然后采用扫描电子显微镜（SEM）来确定凹凸棒石和凹凸棒石接枝共聚物固沙材料（CSF）的形态。利用傅里叶变换红外光谱（FT-IR）揭示了CSF中的分子间相互作用。基于发芽率实验讨论了固沙材料对土壤理化性质和种子萌发的作用，并采用16S rDNA测序技术分析了各样本组微生物群落的差异。结果表明，BAC不仅具有优异的应用性能，显著提高种子发芽率（95%），而且通过调节土壤微生物群落结构促进土壤发育。这项工作为设计防治荒漠化同时提高土壤肥力的固沙材料提供了新的见解。
