水环境中硼的迁移转化过程研究进展

Research progress of boron migration and transformation process in water environment

本文综述了近几年来水环境中硼的化学行为研究情况,对其迁移转化行为进行一个多元化、定量化的研究。在水环境中,硼的迁移转化以共沉淀为主,其次是吸附解吸。本文研究不同影响因素下,硼在水环境中的迁移转化机理及其在植物中的重大作用,对硼的生物有效性进行探讨,讨论硼的生物有效性与pH、温度、土壤水分等的作用关系。研究结果表明:(1)在水环境中,硼吸附量随着水溶液中总硼浓度的升高而增大;pH由强酸性至强碱性变化过程中,硼的吸附量随pH的升高呈先下降再升高再下降的趋势,随温度升高,硼的吸附量则增大;(2)溶液中的其他离子如磷对硼吸附的影响较大,而硫对硼吸附的影响较小,而其他阴离子,如SO_(4)^(2-)和PO_(4)^(3-),显然不影响硼的吸附量;有机质和硼之间也有相当大的关系,研究结论对深入探究硼在水环境中迁移转化的机理及有效治理硼环境污染具有重要意义。

This paper reviews the research on the chemical behavior of boron inwater environment in recent years,and makes a diversified and quantitative study on its migration and transformation behavior.In water environment,the migration and transformation of boron is mainly co-precipitation,the second is adsorption and desorption.In this paper,the migration and transformation mechanism of boron in water environment and its important role in plants were studied under different influencing factors,the bioavailability of boron was discussed,and the relationship between the bioavailability of boron and the effects of pH,temperature and soil moisture was discussed.The results showed that:(1)In water environment,the amount of boron adsorption increases with the increase of total boron concentration in aqueous solution;in the process of pH changing from strong acid to strong alkaline,the amount of boron adsorption decreased first and then increased and then decreased with the increase of pH,and the amount of boron adsorption increased with the increase of temperature;(2)Other ions in the solution,such as phosphorus,have a greater effect on the adsorption of boron,while sulfur has a lesser effect on the adsorption of boron,and other anions,such as SO_(4)^(2-)and PO_(4)^(3-),obviously do not affect the adsorption of boron;There is also a considerable relationship between organic matter and boron,the results of this study are of great significance for further exploring the mechanism of boron migration and transformation in water environment and effective control of boron environmental pollution.