Dairy-manure derived biochar effectively sorbs lead and atrazine.
摘要：
Biochar (BC) produced from agricultural crop residues has proven effective in sorbing organic contaminants. This study evaluated the ability of dairy-manure derived biochar to sorb heavy metal Pb and organic contaminant atrazine. Two biochar samples were prepared by heating dairy manure at low temperature of 200 degrees C (BC200) and 350 degrees C (BC350). The untreated manure (BC25) and a commercial activated C (AC) were included as controls. Sorption of Pb by biochar followed a dual Langmuir-Langmuir model, attributing to Pb precipitation (84-87%) and surface sorption (13-16%). Chemical speciation, X-ray diffraction, and infrared spectroscopy indicated that Pb was precipitated as beta-Pb9(PO4)6 in BC25 and BC200 treatment, and as Pb3(CO3)2(OH)2 in BC350. Lead sorption by AC obeyed a single Langmuir model, attributing mainly to surface sorption probably via coordination of Pb d-electron to C==C (pi-electron) and --0--Pb bonds. The biochar was 6 times more effective in Pb sorption than AC, with BC200 being the most effective (up to 680 mmol Pb kg(-1)). The biochar also effectively sorbed atrazine where atrazine was partitioned into its organic phase, whereas atrazine uptake by AC occurred via surface sorption. When Pb and atrazine coexisted, little competition occurred between the two for sorption on biochar, while strong competition was observed on AC. Results from this study indicated that dairy manure can be converted into value-added biochar as effective sorbent for metal and/or organic contaminants.
展开
DOI：
10.1021/es803092k
被引量：
年份：
2009
ACS
ACS
(全网免费下载)
万方医学
掌桥科研
万方医学
查看更多
Semantic Scholar
(全网免费下载)
dx.doi.org
CAB Direct
NCBI
adsabs.harvard.edu
ResearchGate
(全网免费下载)
ResearchGate
ProQuest
EBSCO
soils.ifas.ufl.edu
(全网免费下载)
s3-eu-west-1.amazonaws.com
(全网免费下载)
mendeley.com
pubfacts.com
frontiersin.org
mysciencework.com
osti.gov
(全网免费下载)
onAcademic
ACS
(全网免费下载)
Semantic Scholar
(全网免费下载)
ResearchGate
(全网免费下载)
s3-eu-west-1.amazonaws.com
(全网免费下载)
osti.gov
(全网免费下载)
soils.ifas.ufl.edu
(全网免费下载)
通过文献互助平台发起求助，成功后即可免费获取论文全文。
相似文献
参考文献
引证文献
辅助模式
引用
文献可以批量引用啦~
欢迎点我试用！
