农业环境科学学报2018，Vol.37Issue(1)：157-164,8.DOI:10.11654/jaes.2017-0868
猪粪沼渣水热炭中重金属浸出特征研究
The leaching characteristics of heavy metals from hydrochars of digested swine manure
摘要
Abstract
Hydrothermal carbonization(HTC) is an effective way to treat high water content waste,such as digested animal manure.In order to clarify the leaching characteristics of heavy metals in hydrochars derived from digestates,research was conducted on digested swine manure(M-R) that was hydrothermally carbonized at 190 ℃ and 250 ℃,and the corresponding hydrochars(M-190 and M-250,respectively)were used to study the total contents of Zn,Cu,As,Pb,and Cd and their leaching characteristics from the hydrochars under different pH conditions.Compared with M-R,the total contents of Zn,Cu,and As in M-190 were higher by 4.12％,7.00％,and 26.57％,respectively,whereas those in M-250 were higher by 18.99％,14.00％,and 289.70％.On the contrary,the total amount of Pb and Cd decreased after HTC.The contents of dissolved heavy metals in M-190 and M-250 were significantly(P＜0.001) lower than those in M-R.Meanwhile,the contents of dissolved heavy metals in M-250 were remarkably(P＜0.001) lower than those in M-190.The contents of dissolved Zn,Cu,Pb,and Cd in M-250 were lower by 50.99％,95.50％,66.47％,and 100.00％,respectively,compared to those in M-190.The leaching contents of heavy metals in the hydrochars reached their maximum at pH 2.After that,their leaching contents decreased sharply with an increase of pH.The leaching contents were similar as the pH ranged from 4 to 10.The results showed that HTC had an enrichment effect on Zn,Cu,and As in M-190 and M-250,and appropriately raising the HTC temperature reduced the contents of dissolved heavy metals in the hydrochars.This study is not only beneficial to the safety assessment of hydrochars of digested swine manure,but HTC is an effective way to treat digested swine manure harmlessly.关键词
水热炭/猪粪沼渣/重金属/浸出特征Key words
hydrochar/digested swine manure/heavy metal/leaching characteristics分类
资源环境引用本文复制引用
郑孟杰,靳红梅,张松贺,李继洲..猪粪沼渣水热炭中重金属浸出特征研究[J].农业环境科学学报,2018,37(1):157-164,8.基金项目
国家自然科学基金项目(21577052) （21577052）
国家重点研发计划课题(2016YFD0501401) （2016YFD0501401）
江苏省农业科技自主创新资金项目(CX(16)1003-1)The National Natural Science Foundation of China(21577052) （CX(16）
The National Major Research Program of China(2016YFD0501401) （2016YFD0501401）
The Independent Innovation of Agricultural Science and Technology of Jiangsu Province(CX(16)1003-1) （CX(16）
