再生水灌溉对绿地土壤环境的影响

Effects of reclaimed water irrigation on soil environment of greenbelt .

以二级水(常规生化处理)、三级水(连续微滤处理)和自来水分别灌溉3种草坪草、3种乔木和3种灌木,对比研究再生水灌溉绿地对绿地土壤环境的影响.结果表明,再生水灌溉与自来水相比土壤全N、全P、全盐含量均无显著差异,重金属(铬、镉、汞、铅、砷)含量无明显变化.二级处理水灌溉后,土壤有机质含量和土壤细菌数量有增加的趋势.二级处理水和三级处理水灌溉对绿地土壤环境均无明显的影响,但要加强长期灌溉的土壤盐分的监控,防避土壤盐分的积累.使用二级处理水灌溉要严格控制卫生学指标,以规避影响人体健康的风险.

In order to compare the effects of reclaimed water irrigation on the soil environment of greenbelt, the secondary treated water, tertiary treated water and tap water were used to irrigate three kinds of turfgrass, arbors and three kinds of shrubs respectively. Results showed that there were no significant differences in the soil irrigated with reclaimed water and tap water in terms to the content of total nitrogen, total phosphor, total salt, and heavy metal such as chrome, cadmium, hydrargyrum, lead and ar...