期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：237
期号：2
页码：022031
DOI：10.1088/1755-1315/237/2/022031
出版社：IOP Publishing
摘要：The presence of boron in gas field wastewater poses a serious risk to human and ecosystem health. Zn/Mg/Al-layered double hydroxides (LDHs) were synthesized by the co-precipitation method and used for boron removal from gas field wastewater. The adsorption conditions were optimized by response surface methodology (RSM) based on the Box–Behnken (BBD) method. The highest removal efficiency achieved was approximately 68% when the Zn/Mg/Al LDHs adsorbent was prepared with a Zn/Mg/Al molar ratio of 2.6:0.4:1 and calcination temperature of 773 K. The maximum removal efficiency was obtained under a temperature, time, dosage and pH of 10 °C, 4.8 h, 15 g L−1 and 5.0, respectively. The results of boron adsorption were fitted to a Langmuir isotherm, achieving an R2 = 0.9633, and the adsorption process followed second-order kinetics.
