Zhang Xiaozhuan, Zhao Guohua, Shi Xibao, Yuan Bingbing, Zhao Kejiang, Tian Zhenbang, Huang Zuohua, Ma Zhongjun, Li Meng, Zhao Liang
Henan International Joint Lab of Key Technology in Water Treatment, Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, School of Environments, Henan Normal University, Xinxiang, 453007, Henan, China.
College of Life Sciences, Henan Normal University, Xinxiang, 453007, Henan, China.
Environ Sci Pollut Res Int. 2022 Jul;29(33):50362-50375. doi: 10.1007/s11356-022-19490-7. Epub 2022 Mar 1.
This work developed a composite (Pe-FeLs) which loaded ferric lignin on polyethylene film (PE film) by chemical modification and physico-chemically characterized by Microscope, FESEM with elemental mapping analysis, and XRD. Microscope pictures showed that chemical modification did not destroy the appearance of PE film. The FESEM images of Pe-FeLs showed the well-distributed clusters could be clearly seen and most of the particles were spherical morphology. Elemental mapping of individual element on Pe-FeLs clearly indicated the existing of iron. The XRD pattern showed the amorphous hydroxides of iron on Pe-FeLs. In arsenic solution, the total arsenic adsorption capacity of Pe-FeLs was much higher than that of ferric lignin and PE, which showed Pe-FeLs had the ability to adsorb arsenic. For making Pe-FeLs work well in the soil, a Pe-FeLs system was set up with plastic grid plate, PE film with holes, Pe-FeLs, PE film, and plastic grid plate from the upper to bottom in order. With applying Pe-FeLs system under the soil, arsenic was significantly reduced by 25.5 ~ 53.4% in heavily, moderately, and lower arsenic-polluted soils, the biomass of the romaine lettuce increased and arsenic accumulation in the romaine lettuce decreased.
本研究通过化学改性将木质素铁负载到聚乙烯薄膜（PE膜）上，制备了一种复合材料（Pe-FeLs），并利用显微镜、带有元素映射分析的场发射扫描电子显微镜（FESEM）和X射线衍射仪（XRD）对其进行了物理化学表征。显微镜照片显示化学改性并未破坏PE膜的外观。Pe-FeLs的FESEM图像显示，可以清晰地看到分布均匀的团簇，并且大多数颗粒呈球形形态。对Pe-FeLs上单个元素的元素映射清楚地表明了铁的存在。XRD图谱显示Pe-FeLs上存在铁的无定形氢氧化物。在砷溶液中，Pe-FeLs的总砷吸附能力远高于木质素铁和PE，这表明Pe-FeLs具有吸附砷的能力。为了使Pe-FeLs在土壤中发挥良好作用，构建了一个Pe-FeLs系统，从顶部到底部依次为塑料格栅板、带孔PE膜、Pe-FeLs、PE膜和塑料格栅板。在土壤下方应用Pe-FeLs系统后，重度、中度和轻度砷污染土壤中的砷含量显著降低了25.5%至53.4%，生菜生物量增加，生菜中的砷积累量减少。
