Chromium-polluted soil treatment method

• Main Authors: SONG ZHENGXING, SHEN WEIDONG, LIU LIPING, ZHONG WEIREN, CAO ZHENXING
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2021
• Subjects: DISPOSAL OF SOLID WASTE; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINATED SOIL; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING

The invention discloses a chromium-polluted soil treatment method, which comprises the following steps: preparing nanoparticles of graphene oxide loaded nano-iron by using a liquid phase reduction method, pre-adsorbing the chromium-polluted soil by using the nanoparticles, and curing and compounding the chromium-polluted soil subjected to pre-adsorption treatment with a geopolymer. According to the graphene oxide loaded nano-iron/geopolymer composite material, the graphene oxide loaded nano-iron is introduced firstly to adsorb chromium, and then the geopolymer is cured, so that the leaching toxicity of chromium-polluted soil can be effectively reduced, and and meanwhile, the graphene oxide loaded nano-iron plays a certain role in enhancing the compression resistance of the material. 本发明公开了一种铬污染土的治理方法，以液相还原法制备氧化石墨烯负载纳米铁的纳米粒子，再采用所述纳米粒子对铬污染土进行预吸附，随后将预吸附处理后的铬污染土与地质聚合物进行固化复合。本发明氧化石墨烯负载纳米铁/地质聚合物复合材料通过先引入氧化石墨烯负载纳米铁对铬进行吸附，随后进行地质聚合物固化，能够有效的减少铬污染土的浸出毒性，同时，氧化石墨烯负载纳米铁在其中起到一定的增强材料抗压性能的作用。