Yellow phosphorus is used widely in the world for production of phosphoric acid, various phosphates, flame retardant, detergent, water treatment, metal surface treatment, etc. After the production of yellow phosphorus, a large amount of phosphorus sludge is discharged to environment, causing environment pollution. This work focused on treatment of yellow phosphorus slag (YPS) and application of it as an absorbent for chromium (VI) ion and methylene blue. The YPS was first washed with water to remove phosphoferrite (FeP) and impurities and then being milled and transferred to a float sorting system to obtain YPS particles. The characteristics of YPS particles were determined by inductively coupled plasma-mass-spectrometry (ICP-MS), energy-dispersive X-ray spectroscopy (EDX), infrared spectroscopy (IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), zeta potential, and nitrogen adsorption methods. The YPS particles were retreated with NaOH, HNO3, and EDTA solutions to evaluate the influence of these agents on metal ion and organic compound adsorption ability by YPS. The adsorption parameters of chromium (VI) ion and methylene blue (MB) by treated YPS particles were recognized by the ultraviolet-visible (UV-Vis) spectrometer. The effects of temperature, pH solution, and initial concentration of absorbed substances on the adsorption ability were investigated. The adsorption isotherms and adsorption kinetics of chromium (VI) ion and MB by YPS particles were also determined. The obtained results confirmed that the green technology used to treat the YPS2 particles is suitable to obtain an effective absorbent. The adsorption efficiency of YPS2 particles for removal of chromium (VI) ions is smaller than that for removal of MB in aqueous solutions. The adsorption isotherm of MB adsorption process is complied with the Langmuir isotherm while the adsorption kinetic fits well with the pseudo-second-order reaction model. The thermodynamic parameters of MB adsorption processed on YPS2 were calculated and discussed.

中文翻译：

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黄磷渣的处理及其作为铬（VI）离子和亚甲蓝的吸收剂的再利用

黄磷在国际上广泛用于生产磷酸、各种磷酸盐、阻燃剂、洗涤剂、水处理、金属表面处理等。 黄磷生产后，大量的磷污泥排放到环境中，造成环境污染。这项工作的重点是黄磷渣 (YPS) 的处理及其作为铬 (VI) 离子和亚甲蓝吸收剂的应用。YPS首先用水洗涤以去除磷铁酸盐（FeP）和杂质，然后研磨并转移到浮选系统以获得YPS颗粒。YPS颗粒的特性通过电感耦合等离子体质谱（ICP-MS）、能量色散X射线光谱（EDX）、红外光谱（IR）、扫描电子显微镜（SEM）、X 射线衍射 (XRD)、zeta 电位和氮吸附方法。用 NaOH、HNO3 和 EDTA 溶液对 YPS 颗粒进行处理，以评估这些试剂对 YPS 对金属离子和有机化合物吸附能力的影响。通过紫外-可见（UV-Vis）光谱仪识别处理过的YPS颗粒对铬（VI）离子和亚甲蓝（MB）的吸附参数。考察了温度、溶液pH和吸附物质初始浓度对吸附能力的影响。还测定了 YPS 颗粒对铬 (VI) 离子和 MB 的吸附等温线和吸附动力学。所得结果证实，用于处理YPS2颗粒的绿色技术适合获得有效的吸收剂。YPS2 颗粒去除铬 (VI) 离子的吸附效率小于去除水溶液中 MB 的吸附效率。MB吸附过程的吸附等温线符合Langmuir等温线，而吸附动力学符合准二级反应模型。计算并讨论了YPS2上MB吸附的热力学参数。