中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 几种胡敏酸还原容量的表征与比较 土壤学报 2012,49 (5) 901-908
Position: Home > Articles > CHARACTERIZATION OF AND COMPARISON BETWEEN REDUCTION CAPACITIES OF DIFFERENT HUMIC ACIDS Acta Pedologica Sinica 2012,49 (5) 901-908

几种胡敏酸还原容量的表征与比较

作  者：
江韬;魏世强;李雪梅;李梦婕;彭国栋;刘双营;罗畅
单  位：
四川省绵阳市环境监测站;西南大学资源环境学院
关键词：
胡敏酸;腐殖质;电子受体;还原容量;铁
摘  要：
还原容量(RC)是衡量胡敏酸(HA)还原特性的重要指标。采用饱和H2振荡法和土壤溶液法对HA分别进行化学和微生物预处理,分别以硝酸铁(Fe(NO3)3)、柠檬酸铁(FeCit)作电子受体,测定了三种HA(上海巨枫SH,天津光复TJ,缙云山JY)的本底还原容量(NRC),化学还原容量(CRC),微生物还原容量(MRC)。对不同电子受体条件下、不同初始状态和不同种类的胡敏酸的RC进行比较。结果表明:三种HA中,以缙云山土壤提取的胡敏酸RC值最高,还原容量最大,分别为20.21±0.26 mmolc mol-1 C(NRC)、26.02±1.12 mmolc mol-1 C(CRC)和29.29±1.56 mmolc mol-1 C(MRC)。两种电子受体中,采用Fe(NO3)3得到的RC明显高于在FeCit条件下。另外,溶液态HA的RC明显高于固态。由此证明胡敏酸还原容量是一个相对量;其容量大小不仅和自身结构、性质有关,也受到HA初始形态和不同电子受体的影响。对比三个还原容量指标发现CRC和MRC显著大于NRC,而CRC和MRC之间无明确大小关系,因此用CRC来表征HA被微生物还原后的还原容量(MRC)还需作进一步验证。
译  名：
CHARACTERIZATION OF AND COMPARISON BETWEEN REDUCTION CAPACITIES OF DIFFERENT HUMIC ACIDS
作  者：
Jiang Tao1 Wei Shiqiang1 Li Xuemei1 Li Mengjie1 Peng Guodong1 Liu Shuangying2 Luo Chang1(1 College of Resource and Environment,Southwest University,Chongqing Key Laboratory of Agricultural Resources and Environment,Engineering Research Center for Agricultural Non-Point Source Pollution Control in the Three Gorges Reservoir Area,Chongqing 400716,China)(2 Mianyang Environmental Monitoring Station,Mianyang,Sichuan 621000,China)
关键词：
Humic acid;Humic substance;Electron acceptor;Reduction capacity;Iron
摘  要：
As an important parameter,Reduction capacity(RC) is recognized for evaluating redox characteristics of humic acids(HA) in environment.In this study,three HAs(tagged as SH,TJ and JY respectively) from different sources were selected and pretreated through methods of saturated hydrogen oscillation and soil solution incubation respectively for determining chemical reduction capacity(CRC) and microbial reduction capacity(MRC) by reduction of two electron acceptors including ferric nitrate(Fe(NO3)3) and ferric citrate(FeCit),in comparison with native reducing capacity(NRC) obtained through the same measurement method based on HA samples without any pretreatments.The results suggested that HA extracted from local humus layer of soil in JinYun Mountain had the greatest RC among three humic acids,which showed the highest RC values of 20.21±0.26 mmolc mol-1 C(NRC),26.02±1.12 mmolc mol-1 C(CRC) and 29.29±1.56 mmolc mol-1 C(MRC),respectively.Meanwhile,Of the two electron acceptors,Fe(NO3)3 induced much higher RC than FeCit.In addition,HA in solution status showed higher RC than in solid status.All the above findings demonstrate that reduction capacity(RC) of HA is a variable parameter,which is closely related to the structure and properties of the HA per se and also affected by its initial status(e.g.solution or solid) and electron acceptors.Comparison between the RC indexes of the HAs shows that CRC and MRC were evidently higher than NRC,however no significant difference in magnitude was observed between CRC and MRC.However,whether it is feasible to use CRC to characterize MRC needs further study for validation.

相似文章

导出引用
计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46