The usage of pig iron sludge nanoparticles as adsorbent was explored to remove Cr(VI) from effluents. Batch sorption was administered to check the effect of various parameters on the sorption method, namely, pH, interaction time, as well as Cr(VI) concentration and dosage. The adsorption potential was related with the parameters. An inovative flow chart was proposed by using this sludge, which is a byproduct from the pig iron manufacturing industries, as adsorbent for the treatment of Cr(IV)-contaminated water, and then this sludge is recycled for drying followed by filtration. The adsorbed Cr(VI) will be useful for producing steel in a blast furnace. The sorption followed a second-order mechanism and the experimental data obeyed the Langmuir adsorption isotherm. Surface diffusion was found to be the sluggish step and thus is the rate-limiting step.

中文翻译：

---

生铁污泥去除废水中Cr(VI)的工艺技术

研究了使用生铁污泥纳米颗粒作为吸附剂来去除废水中的 Cr(VI)。进行批量吸附以检查各种参数对吸附方法的影响，即 pH 值、相互作用时间以及 Cr(VI) 浓度和剂量。吸附电位与参数有关。提出了一种创新的流程图，将生铁制造行业的副产品污泥作为吸附剂处理 Cr(IV) 污染水，然后将该污泥回收干燥，然后过滤。吸附的 Cr(VI) 可用于高炉炼钢。吸附遵循二级机理，实验数据服从朗缪尔吸附等温线。