摘要
为促进城市污泥和发电厂粉煤灰的资源化、无害化利用,采用粉煤灰钝化污泥中的重金属,并利用钝化污泥进行园林黄壤改良及翠芦莉栽培,结果表明:粉煤灰对城市污泥钝化具有显著作用。粉煤灰显著降低了城市污泥有效态Fe、Mn的含量,城市污泥和粉煤灰按1∶2比例配比时,钝化效果最佳。粉煤灰钝化城市污泥在钝化8h后效果最佳,污泥中有效态重金属含量最低。磷石膏钝化城市污泥效果不显著。钝化污泥显著增加了土壤和植物中氮磷钾养分含量,其中植物全氮含量增幅较大,且能显著增加土壤微量元素。土壤和钝化污泥按1∶1配比时,翠芦莉生长相比其他处理更为显著,植株地上、地下部干物质累积量达到最高,能促进翠芦莉的生长。
Utilization of the ash generated from coal-fired power plants to reduce heavy metal content in municipal sludge was investigated.By using the coal ash to passivate heavy metals in the sludge to be added to yellow garden soil for a pot experiment,the effect on the growth of Ruellia Brittoniana was monitored.The results showed that the coal ash significantly reduced the heavy metals,especially available Fe and Mn,in the sludge.The passivation effect was most significant when the ratio of municipal sludge to coal ash was 1 to 2 in an 8-hour treatment.By comparison,the phosphor-gypsum addition showed no significant passivating effect on the sludge.The coal ash passivated sludge significantly increased the contents of nitrogen,phosphorus,potassium,and microelements in the gardensoil.Meanwhile the plants grown on the composite soil significantly increased on total nitrogen.Among all mixing ratios,the mixture of equal parts of soil and the passivated sludge allowed the greatest amount of dry matters accumulated in both the above-and underground parts of R.brittoniana,and consequently,was deemed appropriate for urban gardening applications.
作者
王淑民
陈能海
刘向国
付影
刘泓
WANG Shu-min;CHEN Neng-hai;LIU Xiang-guo;FU Ying;LIU Hong(College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Fuzhou Institute of Landscape Architecture,Fuzhou,Fujian 350002,China)
出处
《福建农业学报》
CAS
北大核心
2018年第10期1097-1103,共7页
Fujian Journal of Agricultural Sciences
基金
福州市科技局项目(2013-G-106
KSN2R0001)
福建农林大学科技创新项目(KFA1740A)
关键词
粉煤灰
磷石膏
钝化污泥
园林黄壤
翠芦莉
coal ash
phosphor-gypsum
passivated sludge
yellow garden soil
Ruellia Brittoniana
