废水纺织染料处理是一项挑战,需要开发环保技术,以避免与水资源短缺和健康环境相关的令人担忧的问题。这项研究调查了菱铁矿粘土作为Tamgroute天然低成本丰富粘土的潜力,摩洛哥(TMG),其在850°C下煅烧3小时(TMGC)之后用0.1MNaOH碱(TMGB)活化,然后将其应用于来自水溶液的刚果红(CR)阴离子染料中。各种关键操作参数的影响:吸附剂剂量,接触时间,染料浓度,pH值,温度,和盐的作用,通过间歇系统中的一系列吸附实验进行了研究,影响了TMG的吸附性能,TMGC,和TMGB用于CR染料去除。此外,吸附动力学的性质,等温线,和热力学也进行了研究。实验结果表明,最佳吸附发生在酸性pH值。在100mgL-1的CR浓度下,平衡消除率为68%,38%,和92%的TMG,TMGC,TMGB,分别。吸附过程迅速,遵循伪二阶动力学,最好用Temkin和Langmuir等温线来描述。热力学参数表明,CR在TMGB上的吸附是吸热的和自发的。CR在TMGB上的吸附实验值与响应面方法的预测一致。在以下条件下,这些导致最大去除率为99.97%:pH=2,TMGB剂量为7gL-1,CR浓度为50mgL-1。吸附剂TMGB的制备成本相对较低,约为$2.629g-1,并且能够在超过6个热煅烧循环中再生,CR去除率约为56.98%,在中试工业规模上刺激其用于纺织废水处理。
Wastewater textile dye treatment is a challenge that requires the development of eco-friendly technology to avoid the alarming problems associated with water scarcity and health-environment. This
study investigated the potential of phengite clay as naturally low-cost abundant clay from Tamgroute, Morocco (TMG) that was activated with a 0.1M NaOH base (TMGB) after calcination at 850°C for 3 hours (TMGC) before its application in the Congo red (CR) anionic dye from the aqueous solution. The effect of various key operational parameters: adsorbent dose, contact time, dye concentration, pH, temperature, and the effect of salts, was studied by a series of adsorption experiments in a batch system, which affected the adsorption performance of TMG, TMGC, and TMGB for CR dye removal. In addition, the properties of adsorption kinetics, isotherms, and thermodynamics were also studied. Experimental results showed that optimal adsorption occurred at an acidic pH. At a CR concentration of 100 mg L-1, equilibrium elimination rates were 68%, 38%, and 92% for TMG, TMGC, and TMGB, respectively. The adsorption process is rapid, follows pseudo-second-order kinetics, and is best described by a Temkin and Langmuir isotherm. The thermodynamic parameters indicated that the adsorption of CR onto TMGB is endothermic and spontaneous. The experimental values of CR adsorption on TMGB are consistent with the predictions of the response surface methodology. These led to a maximum removal rate of 99.97% under the following conditions: pH =2, TMGB dose of 7g L-1, and CR concentration of 50 mg L-1. The adsorbent TMGB\'s relatively low preparation cost of around $2.629 g-1 and its ability to regenerate in more than 6 thermal calcination cycles with a CR removal rate of around 56.98%, stimulate its use for textile effluent treatment on a pilot industrial scale.