胡敏酸吸附重金属Cu2+Pb2+Cd2+的特征及影响因素.pdf
文本预览下载声明
农业环境科学学报2008,27(6):2240—2245
of Science
Jou兀lal
A旷o·Enviro咖ent
朱丽琚1,张金池2,俞元春2,宰德欣1,池杏微,,孙慧宇:,胡书燕2
(1.南京林业大学理学院,江苏南京210037;2.南京林业大学森林资源与环境学院,江苏南京210037)
摘要:采用碱溶酸沉淀法提取腐殖质中的胡敏酸,研究了胡敏酸对Cu舢、Pb舢、c驴的吸附特征及作用机理。结果表明,在相同初始
外,更多地发生在羧基和羧基之间。
关键词:胡敏酸;Cu2+;Pb“;Cd2+;吸附;影响因素;红外光谱
中图分类号:x131.3文献标识码:A 文章编号:1672—2043(2008)06—2240埘
Char懿teriSticsand FactorsofH啪icAcid MetalsC矿P铲C矿
A胁cting Ad∞rbingH昀vy
ZHU Jin—chi2,YuYuan—chun2,zAIDe—xinl,CHI
Li_junl,zHANG xing—wei’,SUNHlli—yu2HUShu—yan2
(1.Science Forest 2 Resource8andEnvi啪ment FonestUni—
10037,China;2.Fo陀8t
College,NanjingUnivers畸,№njjng Couege,Nanjing
versity,Nanjing210037,China)
beha“orof huJllicacidwhichex的ctedall【aJjdj8鲫luti加-acid
Abs的ct:,rheadso巾tive cu“,Pb2+,cd“onlo by d印画d叩w船inv∞堍砒ed.
of humicacidwa8 thanPb2+andCd2+att王les锄einitialconcentratioh.’Ik
Adsorption hig}ler
capacityCu2+by
as
was data aJldTemkini∞t}Ie瑚s8howed t0tIlead—
follows:Cu2◆Pb2Cd2+.Equilmriumof【丑ngrnuir,Freundlich si印洒c粕trelationship
be8tfor
of theFreundlichiso山e珊finedbest(Pb2+:尺2=O.994 isatlle珊wasCu2+
sorptionPb“、cd2+,aIld 9,Cd2+:R2=0.9736).L肌grnuir
fit fktor of
(尺2=0.9984),thenFreundIich Tbmkinisothe珊didnot valuew鹊tllemain Cu2+
isothenIl,but veryweⅡ.pH a日.ectingadsoIption
鲫d less acidwenc tIle of
cd2、bute能ccofPb“.Asawhole,aclow valuehumjc cu■Pb■Cdt
显示全部