Development of Pollutant-Targeted Recognition Slow-Release Materials and Research on Petrochemical Wastewater Treatment

Abstract

- In response to the trailing and rebounding problems caused by conventional remediation technologies for NAPL pollutants in groundwater at petrochemical contaminated sites, this study developed a modified cellulose as a safe, non-toxic and biodegradable embedding matrix, and combined it with advanced oxidants such as potassium permanganate, persulfate, and nZVI-activated persulfate as active remediation agents. The effective embedding of advanced oxidants was achieved by using organic phase separation method to achieve sustained release of oxidants, and targeted recognition and directional enrichment of organic pollutants. A solvent recycling process for the organic phase separation assembly system was constructed to significantly reduce the production cost of pollutant-targeted recognition slow-release materials. The surface properties of the modified cellulose matrix in the slow-release material and its mechanism of action in targeted recognition of pollutants were studied, and the law of the surface modification process and targeted recognition of pollutants was characterized. The dissolution mechanism and law of typical pollutants in petrochemical contaminated sites were studied to elucidate the release mechanism of targeted recognition slow-release materials for pollutants, and to establish a quantitative relationship between the slow-release rate, slow-release time, material ratio assembly process, and material ratio, to achieve quantitative control of the slow-release performance of pollutant-targeted recognition slow-release materials.This study has significant implications for the development of effective and sustainable remediation technologies for NAPL pollutants in groundwater at petrochemical contaminated sites, and provides a theoretical basis and technical support for the practical application of pollutant-targeted