Precipitation recovery of boron from wastewater by hydrothermal mineralization

被引：86

作者：

Itakura, T ^{[1
]}

Sasai, R ^{[1
]}

Itoh, H ^{[1
]}

机构：

[1] Nagoya Univ, Ecotopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

WATER RESEARCH | 2005年 / 39卷 / 12期

关键词：

boron; resource recovery; hydrothermal mineralization; calcium borate;

D O I：

10.1016/j.watres.2005.04.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

It is well known that boric acid exhibits various toxic effects on plant, animal and human beings even at very low concentrations. Thus, the development of boron-removal technique from wastewater has been intensively investigated. In this study, a new hydrothermal treatment technique was developed to recover boron as recyclable precipitate Ca2B2O5 (.) H2O from aqueous solutions. As a result, it was found that the hydrothermal treatment using calcium hydroxide as a mineralizer converted boron in the aqueous media effectively into calcium borate, Ca2B2O5 (.) H2O. In the optimal hydrothermal condition, more than 99% of boron was collected from the synthetic wastewater of 500ppm. Thus, the present hydrothermal treatment in the presence of calcium hydroxide is recommended as one of the effective techniques to recover boron from aqueous media. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2543 / 2548

页数：6

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