关键词: 稀土改性沸石;水生态修复;水质改善;生活污水;黑臭水体治理;江西省瑞昌市;

Abstract: Rare earth modified zeolites (LnMZ) has great capacity of pollutant adsorption and replacement, however its application in water treatment is still restricted in laboratory stage with rare practical applications. Taking the project of emergency treatment of black and odorous waters in east area of Ruichang City, Jiangxi Province as an example, the possibility of treating black and odorous waters by using LnMZ was discussed. The east area is located in the city center of Ruichang City with four main sewage canals that were typical black and odorous waters, namely the concentration of dissolved oxygen was low, whereas the ammonia nitrogen and total phosphors levels were high, appearing black gray and emitting foul odor. Through preliminary investigation, methodology research and technical demonstration, we put forward a coordinated treatment route of rare earth modified zeolite with artificial aeration to treat regional black and odorous water, in purpose of improving water quality, restoring water ecology, and improving self-purification ability. The study showed that LnMZ can simultaneously and efficiently reduce the concentrations of ammonia nitrogen and total phosphorus with maximum reduction rates over 75%, showing significant ecological benefits. This method provides new ideas for the treatment of urban black and odorous waters.

Key words: rare earth modified zeolites; water ecology restoration; water quality improvement; domestic sewage; black and odorous water treatment; Ruichang City; Jiangxi Province