Experimental study on treatment and regeneration of heavy metal contaminated water in mountainous and remote disaster areas using phosphorylated chitosan loaded PP cotton
Based on the difficulty of purifying heavy metal water after disasters,the use of phosphory-lated chitosan loaded PP cotton fiber materials for adsorption treatment of simulated heavy metal con-taminated water was explored.The surface properties of the material were characterized.Taking Cd(Ⅱ)in water as the target,the factors affecting the material adsorption efficiency,adsorption ki-netics,isotherm characteristics and regeneration conditions were investigated.The removal efficiency of the material for a variety of typical divalent heavy metal ions was evaluated,and on-site testing was carried out in actual water bodies.The results indicate that the phosphorylated active film is obviously significant,and the degree of phosphorylation of the active layer is crucial.The fiber has good adapta-bility,and the adsorption efficiency for Cd(Ⅱ)remains stable within a pH range of 4-10,and is less affected by common coexisting anions in water except for bicarbonate and phosphate.The material has good regeneration performance,and the Cd(Ⅱ)adsorption rate is still higher than 80％after 3 cycles of regeneration.The material has good removal performance for other typical divalent heavy metals ex-cept Cd(Ⅱ).It is used as a reverse osmosis security filter element filler in a portable water purifica-tion device developed based on the funded project.It can serve as a heavy metal barrier before mem-brane and exhibit good practical application potential.
heavy metalschitosanPP cotton fiberadsorptionCd(Ⅱ)pre-membrane pretreatment
万方数据
维普
