全国主要土壤铁重金属形态及其与土壤性质的关系  

The Correlation between the Forms of Iron and the Properties of Soils in China

作　　者：冉继伟 张旭 宁平[1] 孙鑫[1] 张榆霞[3] 金玉[3] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650093 [2]昆明市城市排水监测站,云南昆明650034 [3]云南省环境监测中心站,云南昆明650034

出　　处：《环境科学导刊》2017年第4期1-4,共4页Environmental Science Survey

摘　　要：在全国具有代表性的16个地区采集代表性的土壤,运用Tessier五步连续提取法对土壤中铁交换态、铁碳酸盐态、铁锰氧化态、有机态和残渣态5种形态进行了分析,并就铁元素的重金属形态和土壤有机质、CEC、物理性粘粒含量以及pH间的相关性进行了分析。结果表明:在所采集的土样中,铁元素主要以矿物态的形式存在,可交换态比例较低,氧化态、碳酸盐态比例较高。交换态铁浓度与土壤pH值呈显著负相关,与土壤物理性粘粒浓度表现为极显著正相关;碳酸盐态铁与pH值表现为显著负相关,与CEC的关系则为显著的正效应;氧化态铁含量与土壤pH值有关,铁为负效应;土壤中有机态铁浓度随着土壤有机质含量和物理性粘粒含量的减少而下降;矿物态铁主要受土壤母质的影响,与土壤的CEC表现为显著的正效应。The target soil samples in 16 representative areas of China were collected. The different forms of soil exchangeable iron,iron carbonate,Fe-Mn oxide,organic state and residual state using Tessier five step sequential extraction methodwereanalyzed. The correlations between the forms of irons and the organic soil matter,CEC,clay content,and pH value were examined. The results showed that the iron mainly existed in the form of state with low proportion of exchangeable from and high proportions of oxidation state and carbonate state. The exchangeable iron concentration was negatively correlated to soil pH value. However,it was positively correlated to soil physical clay concentration. The performance and soil physical clay concentration was significantly correlated to pH value. Iron carbonate showed significant negative correlation to pH value. The relationship between CEC and iron carbonate state was significant positive effect. The content of oxidation state of iron closely related to soil pH value. Iron concentration in soil went down with the decrease of soil organic matter content and soil clay content. The concentration of mineral iron was mainly affected by soil parent material. It showed significant positive effect on CEC.

关 键 词：土壤监测 铁交换态 铁碳酸盐态 铁锰氧化态 有机态和残渣态 土壤性质 关系 

分 类 号：X53[环境科学与工程—环境工程]