锆改性沸石覆盖控制河道底泥污染物释放试验研究

Experimental Study on Release of Pollutants from River Sediment Capped with Zirconium-modified Zeolite

通过室内模拟试验,对比天然沸石与锆改性沸石对黑臭河道底泥污染物释放的处理效果。结果表明,天然沸石覆盖与锆改性沸石覆盖的试验组均可有效降低上覆水体的氨氮、总磷与COD的污染浓度。第30天,锆改性沸石试验组的上覆水体的氨氮、总磷与COD分别下降了35.5%、45.2%与15.9%,其中锆改性沸石覆盖对于总磷的去除效果显著优于天然沸石覆盖。

The effects of natural zeolite and zirconium-modified zeolite on the release of pollutants from black and odor river sediment were compared by laboratory simulation experiments. The results showed that the test group of natural zeolite capping and zirconium-modified zeolite capping can effectively reduce the concentration of ammonia nitrogen, total phosphorus and COD in the overlying water. On the 30 th day, the concentrations of ammonia nitrogen,total phosphorus and COD in the overlying water capped with zirconium-modified zeolite decreased by 35.5%,45.2% and 15.9%, respectively, and the zirconium-modified zeolite capping has a significantly better removal effect on total phosphorus than the natural zeolite capping.