【摘要】 为去除水中结构复杂且难以降解的蒽醌类染料，以不同指标(碘吸附值≥969 mg/g,亚甲基蓝吸附值≥172 mg/g)新疆煤基活性炭为吸附剂，选择常见蒽醌类染料茜素红作为目标污染物。研究了3种不同指标的新疆煤基活性炭(指标由高到低依次标记为：A炭、B炭和C炭)吸附蒽醌类染料茜素红的性能。结果表明：所测3种新疆煤基活性炭对废水中的茜素红均呈现良好的吸附性能：当投炭量为0.5 g/L,茜素红初始浓度为200 mg/L时，3种活性炭对茜素红去除率均可达到95%左右。3种活性炭中次微孔(1.4 nm≤D≤3.2 nm)发达的A炭的吸附性能最强，在此孔径范围的吸附孔在吸附茜素红时起到主要作用；活性炭的表面羧酸类官能团起到一定的促进作用，这使C炭对茜素红的吸附能力略强于B炭。在20～40℃范围内，温度对3种活性炭吸附茜素红的能力均无明显影响。在低污染物浓度条件下，新疆煤基活性炭也可发挥良好吸附效果：当茜素红初始浓度较低(≤20 mg/L)时，0.05 g/L的A炭可将茜素红完全去除。3种煤基活性炭的吸附过程均符合Langmuir吸附等温线和准二级动力学模型，即3种煤基活性炭的吸附过程均更符合单分子层吸附，且对茜素红的吸附为化学吸附。结果表明，新疆煤基活性炭是一种可用于吸附废水中茜素红染料的优良吸附剂。更多还原

【Abstract】 In order to remove the anthraquinone dyes with complex structure and difficult to degrade in water, Xinjiang coal-based activated carbon with different indicators(iodine adsorption value ≥ 969 mg/g, methylene blue adsorption value ≥ 172 mg/g) was used as the adsorbent, and the common anthraquinone dye alizarin was selected. Red as the target pollutant. The adsorption performance of the anthraquinone dye alizarin red was studied by three different indexes of Xinjiang coal-based activated carbon(the indexes were marked as carbon A, carbon B and carbon C in descending order). The results showed that the three types of Xinjiang coal-based activated carbons tested showed good adsorption performance for alizarin red in wastewater: when the amount of carbon input was 0.5 g/L and the initial concentration of alizarin red was 200 mg/L, the three types of activated carbons showed good adsorption performance. The removal rate of alizarin red can reach about 95%. Among the three activated carbons, A carbon with developed submicropores(1.4 nm≤D≤3.2 nm) had the strongest adsorption performance, and the adsorption pores in this pore size range played a major role in the adsorption of alizarin red. The carboxylic acid functional groups on the surface of activated carbon played a certain role in the adsorption process, which made the adsorption capacity of C carbon to alizarin red slightly stronger than that of B carbon. In the range of 20～40 ℃, the temperature had no obvious effect on the adsorption capacity of alizarin red by the three activated carbons. Under the condition of low pollutant concentration, Xinjiang coal-based activated carbon can also play a good adsorption effect: when the initial concentration of alizarin red is low(≤20 mg/L), adding 0.05 g/L of A carbon can remove alizarin from water Pure red is completely removed. The adsorption processes of the three coal-based activated carbons are all in line with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model, that is, the adsorption processes of the three coal-based activated carbons are more in line with the monolayer adsorption, and the adsorption of alizarin red is chemical adsorption. The results show that Xinjiang coal-based activated carbon is an excellent adsorbent for adsorbing alizarin red dye in wastewater.更多还原