环境保护科学2025，Vol.51Issue(2)：34-43,10.DOI:10.16803/j.cnki.issn.1004-6216.202407043
静态浸泡作用下桉树单宁对土壤砷迁移转化影响
Effects of eucalyptus tannins on arsenic transfer and transformation in soil under static soaking
摘要
Abstract
To study the influence of eucalyptus tannins on the migration and transformation of arsenic in soil,the arsenic-contaminated soil from a mining area in Hechi,Guangxi was taken as the research object.Static soaking experiments were carried out by adding different amounts of arsenic-contaminated soil and eucalyptus leaf litter extracts with solid-to-liquid ratios of 1:5 and 1:10 and different concentrations of 0,12.5,25,50,and 100 mg/mL.The pH,electrical conductivity,tannin content of the soil and leachate,as well as the transformation and migration characteristics of the occurrence forms of arsenic in the soil during the 22-day soaking process were analyzed.The results showed that with the increase of the extract concentration and soaking time,the soil pH was significantly reduced under the solid-to-liquid ratio of 1:10 compared with that of 1:5,while the electrical conductivity and tannin content were significantly increased.Correlation analysis indicated that there was a significant positive correlation between soil tannin and water-soluble arsenic,and significant negative correlations between soil tannin and arsenic in weakly acid-extractable,reducible,and residual forms.It was also found that eucalyptus tannins promoted the transformation of reducible and residual arsenic into water-soluble and weakly acid-extractable forms and increased the leaching rate of arsenic.关键词
静态浸泡/桉树凋落叶浸提液/桉树单宁/砷赋存形态/迁移转化Key words
static soaking/eucalyptus leaf litter extract/eucalyptus tannin/occurrence form of arsenic/migration and transformation分类
环境科学引用本文复制引用
赵婷,宋书巧,曾海琪..静态浸泡作用下桉树单宁对土壤砷迁移转化影响[J].环境保护科学,2025,51(2):34-43,10.基金项目
国家自然科学基金青年项目(42301073) （42301073）
广西科技基地和人才专项(桂科AD22080023) （桂科AD22080023）
