|本期目录/Table of Contents|

[1]樊建新,曾宇,孙姣霞,等.淹水过程中土壤硒的形态转化[J].江苏农业科学,2019,47(06):279-283.
　Fan Jianxin,et al.Morphological transformation of selenium in soil during flooded incubation[J].Jiangsu Agricultural Sciences,2019,47(06):279-283.
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淹水过程中土壤硒的形态转化(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第47卷
期数:
2019年第06期
页码:
279-283
栏目:
资源与环境
出版日期:
2019-04-05

文章信息/Info

Title:
Morphological transformation of selenium in soil during flooded incubation
作者:
樊建新1; 2;  曾宇1;  孙姣霞1; 2;  潘瑾1; 2
1.重庆交通大学河海学院，重庆 400074； 2.环境水利工程重庆市工程实验室，重庆 400074
Author(s):
Fan Jianxin; et al
关键词:
硒; 淹水培养; 形态转化; 连续提取; XPS
Keywords:
-
分类号:
S153.6+1
DOI:
-
文献标志码:
A
摘要:
对含硒(Se)土样进行淹水培养，运用连续提取法和X射线光电子能谱分析(XPS)技术，揭示淹水处理过程中土壤硒和铁氧化物的形态转化过程。结果表明，土壤氧化还原电位(Eh值)对土壤硒形态转化起主导作用，淹水培养过程中的水溶态和可交换态硒含量逐渐降低，元素态和残渣态硒含量逐渐增高；XPS分析结果表明，淹水15 d后土壤中Se(Ⅳ)占总硒的百分比由59.7%下降到48.3%，元素态和金属硒化物的含量分别升高了6.3百分点和5.1百分点。同时，淹水过程中土壤还原性铁含量增加，且铁氧化物晶体结构发生了变化。综上所述，土壤Eh值为影响硒活性的主要因素，Eh值对土壤硒形态转化起主导作用，土壤氧化性越强，土壤中硒的活性也越强。在淹水条件下土壤处在还原状态，土壤中硒的移动性逐渐减弱，生物有效性降低。
Abstract:
-

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2018-05-26
基金项目：国家自然科学基金(编号：41401255)；重庆市自然科学基金(编号：cstc2015jcyjA20018)；中国博士后自然科学基金(编号：2016M602633)；重庆市博士后特别资助基金(编号：Xm2017048)。
作者简介：樊建新(1982—)，女，山东聊城人，博士，副教授，主要从事污染物在土壤中的环境行为研究。E-mail：jxfanw@cqjtu.edu.cn。
更新日期/Last Update: 2019-03-20