不同粒径生物炭和活性氧化铝吸附含氟模拟废水实验研究

Study on Adsorption of Fluoride Containing Simulated Wastewater by Biochar and Activated Alumina with Different Particle Sizes

沱河芦岭段部分水样中氟含量超过《地表水环境质量标准》(GB3838-2002)中I~III类标准限值(1.0 mg/L)。为初步探究吸附法对该天然水域氟的去除效果,本文选用了八种不同粒径的生物炭和活性氧化铝对含氟模拟废水开展了室内吸附实验研究。研究结果表明,在F含量为1.3 mg/L模拟条件下,粒径为1~3 mm活性氧化铝、粒径为4 mm柱状椰壳生物炭和粒径为5~8 mm活性氧化铝三种吸附材料对氟吸附效果相对较好,氟的去除率分别为40.67%、37.41%和36.81%。本模拟实验研究初步筛选出的吸附材料可为开展下一步实际地表水降氟试验奠定基础。

The fluorine content (F−) in some water samples of Luling section of Tuohe River exceeded the class I~III standard limit (1.0 mg/L) of the environmental quality standards for surface water (GB3838-2002). To investigate the removal effect of F− in this natural water area by adsorption method, eight kinds of biochar and activated alumina with different particle sizes were used to carry out indoor adsorption experiments on F−containing simulated wastewater in present paper. The results showed that, under the simulated condition of F− = 1.3 mg/L, activated alumina with particle size of 1~3 mm, cylindrical coconut shell biochar with particle size of 4 mm, and activated alumina with particle size of 5~8 mm had relatively high adsorption effects for F−. The F− removal rates of these three materials were 40.67%, 37.41% and 36.81%, respectively. The adsorption materials with high F− adsorption efficiency preliminarily selected in this simulation experimental study can lay a foundation for the next F− reduction test in actual surface water.