Weng Guojie, Li Weidong, Qin Fengyue, Dong Menglu, Yue Shuangqi, Mehmood Sajid, Wang Xu
Center for Eco-Environment Restoration of Hainan Province, School of Ecology, Hainan University, Haikou 570228, China.
School of Topical Agriculture and Foresty, Hainan University, Haikou 570228, China.
Toxics. 2025 Apr 22;13(5):324. doi: 10.3390/toxics13050324.
Chromium (Cr) contamination poses severe risks to plant health and soil quality, requiring sustainable remediation methods. This study explored the synthesis of zirconia nanoparticles (PF-ZrO NPs) from extract and assessed their potential to alleviate Cr toxicity in Chinese cabbage ( var. pekinensis). The characterization of nanoparticles was performed through XRD, SEM, and FTIR analyses, confirming their crystalline nature, structure, and surface chemistry. The results indicated significant declines in plant growth, chlorophyll content, biomass, and nutrient uptake under Cr stress (treatments T2 and T4), accompanied by elevated oxidative stress indicators (HO, MDA) and Cr accumulation. The application of PF-ZrO NPs (T3 and T5) notably reduced shoot Cr concentrations (by 58.94% and 35.90%) and improved the chlorophyll level (by 5.41% and 14.41%). Additionally, nanoparticles increased antioxidant enzyme activity (SOD, POD, CAT) and improved soil properties (pH, cation exchange capacity, nutrient retention). These findings suggest green-synthesized PF-ZrO NPs are effective, environmentally friendly candidates for Cr remediation in contaminated soils.
铬（Cr）污染对植物健康和土壤质量构成严重风险，需要可持续的修复方法。本研究探索了从提取物中合成氧化锆纳米颗粒（PF-ZrO NPs），并评估了它们缓解大白菜（变种 pekinensis）中铬毒性的潜力。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）分析对纳米颗粒进行了表征，证实了它们的晶体性质、结构和表面化学。结果表明，在铬胁迫下（处理T2和T4），植物生长、叶绿素含量、生物量和养分吸收显著下降，同时氧化应激指标（过氧化氢、丙二醛）升高，铬积累增加。PF-ZrO NPs的应用（T3和T5）显著降低了地上部铬浓度（分别降低了58.94%和35.90%），提高了叶绿素水平（分别提高了5.41%和14.41%）。此外，纳米颗粒提高了抗氧化酶活性（超氧化物歧化酶、过氧化物酶、过氧化氢酶），改善了土壤性质（pH值、阳离子交换容量、养分保持能力）。这些发现表明，绿色合成的PF-ZrO NPs是污染土壤中铬修复的有效、环保候选物。
