Study on Preparation and Remediation of Remediation Agent for Heavy Metal Lead Contaminated Soil
This experiment includes using hydrochloric acid to modify and increase the specific surface area and pore volume of purified sepiolite original soil,preparing magnetic sepiolite by Co-precipitation method,and finally loading sulfide nano zero valent iron by liquid-phase reduction method,so as to achieve functional magnetic sepiolite adsorption of soil heavy metal lead(Ⅱ)and recovery effect.And explore the adsorption effect of this repair agent under different conditions.The experimental results showed that the optimum conditions were reached when the pH=5,the temperature was 40℃,the dosage was 0.3 g and the reaction time was 2 H.Under this condition,the removal rate of lead and heavy metals was 11％.The highest recovery of sepiolite is 85％.The results show that the functionalized sepiolite has a good adsorption and separation effect on soil lead(ⅱ)heavy metals.According to this study,sepiolite loaded sulfide nano zero valent iron has a great effect on the adsorption of heavy metal lead in soil.It is possible to develop better lead soil heavy metal pollution remediation agents in practical application in the future.
functionalizationmagnetizationvulcanizationloading nano-sized zero ironliquid-phase reduction method
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