Experimental study on fluoride removal from mine water by complexing-induction fluoride removal agent
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 1
Abstract
In ecologically fragile areas of western and northwestern China, where coal mine water is reused as domestic water or discharged into surface water systems after treatment (the discharge concentration of fluoride (F^-) is less than 1.0 mg/L). In order to solve the disadvantages of adsorption technology such as complicated process, difficult operation and management and unstable effluent quality, an experiment was carried out to remove fluoride by complexing-induction fluoride removal agent. The effects of dosage, reaction time, pH value and turbidity on fluoride removal were investigated, and the defluorination mechanism was analyzed. The results showed that the complexing-induction fluoride removal agent could capture ionic fluoride in mine water through the complex adsorption and chemical induction, and finally form blended precipitates to remove fluoride. When the dosage of the fluoride removal agent was 45 mg/L, reaction time was 12 min, pH value was 8~9 and the turbidity of raw waterwas less than 100 NTU, the concentration of fluoride ions in the simulateds mine water could be reduced from 5 mg/L to less than 1.0 mg/L. Carbonate ions affected fluoride removal significantly, followed by sulfate ions, while chloride ions had no obvious influence. In the continuous experiment of fluoride removal from mine water, the concentration of fluoride in the effluent was 0.75~0.90 mg/L, and the turbidity was 8.2~10.0 NTU.
Authors and Affiliations
GUO Zhongquan|CCTEG Hangzhou Research Institute Co., Ltd., China, ZHENG Lixiang|CCTEG Hangzhou Research Institute Co., Ltd., China, XU Xufeng|CCTEG Hangzhou Research Institute Co., Ltd., China, GAO Jie|CCTEG Hangzhou Research Institute Co., Ltd., China, ZHENG Pengsheng|CCTEG Hangzhou Research Institute Co., Ltd., China, XIAO Yan|CCTEG Hangzhou Research Institute Co., Ltd., China, ZHOU Rulu*|CCTEG Hangzhou Research Institute Co., Ltd., China
Keywords
Related Articles
- EP ID EP737286
- DOI 10.20078/j.eep.20230110
- Views 39
- Downloads 0
Research on the quantitative assessment of the carbon footprint of domestic waste incineration power generation
In recent years, waste incineration power generation has become one method for domestic waste treatment. The carbon footprint can provide a quantitative tool for evaluating greenhouse gas emissions from this process. A t...
Coal mine methane emissions quantification based on vehicle-based monitoring
Obtaining accurate emissions of methane (CH_4), one of the most important non-carbon-dioxide greenhouse gases, is the basis for formulating and validating emission reduction policies. In terms of shortcomings from the "b...
Numerical simulation study of particle deposition and heat transfer characteristics in heat transfer pipes with dimpled dimple surface
The deposition of particulate matter in heat exchanger channels can greatly reduce their heat transfer efficiency, and a better understanding of the deposition characteristics of particulate matter in heat exchanger chan...
Research progress in low carbon smelting technology of blast furnace gas cycle coupling carbon capture
The iron and steel industry ranks first in terms of carbon emissions in the industrial sector. The blast furnace process has the highest carbon emissions, which is the carbon emission reduction bottleneck of the steel in...
Effect of reaction temperature on Mo/Al_2O_3 catalytic hydrodeoxygenation of alkali lignin bio-oils
Alkali lignin, an important source of industrial lignin, can be used for producing aromatic components in biofuels while retaining its aromatic ring structure through hydrothermal liquefaction technology. The temperature...