A flexible layered double hydroxide (LDH) composite of zinc and iron was encapsulated on orange peel activated carbon (Zn–Fe LDH EAC) surface by coprecipitation method to study the adsorption properties of acid blue (AB) and rhodamine B (RhB) dyes from water. Activated carbon was employed as a structure retaining agent as well as a supporting material for Zn and Fe hydroxides. The Zn–Fe hydroxides were introduced on activated carbon surfaces to study the effective removal of toxic AB and RhB dyes and their interaction mechanisms with composite surface. Various characterization techniques such as Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), energy‐dispersive X‐ray (EDAX), Brunauer–Emmett–Teller (BET) and scanning electron microscope (SEM) were used to analyse the fabricated and dye adsorbed composite. The adsorption experiments were carried out by varying different parameters such as contact time, dosage, pH and initial dye concentration. The fabricated composite exhibited increased adsorption density for both the dyes than the other developed hybrids. The Freundlich adsorption isotherm was found to be the better fit data than the Langmuir isotherm. The maximum adsorption of AB and RhB dyes on the adsorbent was 98.4% and 96.2% respectively. The high adsorption efficiency of Zn–Fe LDH Encapsulated Activated Carbon composite was due to the electrostatic attraction between zinc‐ferric hydroxide particles with AB and RhB and also the hydrogen bonding between Zn–Fe LDH EAC composite with AB and RhB dyes, during the adsorption process.

中文翻译：

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Zn-Fe层状双氢氧化物在活性炭上的包封及其通过吸附机理调节阴离子和rhoda染料的柔韧性

通过共沉淀法将锌和铁的柔性层状双氢氧化物（LDH）复合物封装在桔皮活性炭（Zn-Fe LDH EAC）表面上，以研究酸性蓝（AB）和若丹明B（RhB）染料的吸附性能。水。活性炭被用作结构保持剂以及锌和铁的氢氧化物的载体材料。Zn-Fe氢氧化物被引入活性炭表面，以研究有效去除有毒的AB和RhB染料及其与复合材料表面的相互作用机理。各种表征技术，例如傅立叶变换红外光谱（FTIR），X射线衍射（XRD），热重分析（TGA），能量色散X射线（EDAX），Brunauer–Emmett–Teller（BET）和扫描电子显微镜（SEM）用于分析已加工和吸附染料的复合材料。通过改变不同的参数如接触时间，剂量，pH和初始染料浓度进行吸附实验。所制造的复合物对两种染料的吸附密度均高于其他已开发的杂化体。发现弗氏吸附等温线比朗缪尔等温线更好。AB和RhB染料在吸附剂上的最大吸附分别为98.4％和96.2％。Zn-Fe LDH包封的活性炭复合材料的高吸附效率是由于氢氧化铁锌颗粒与AB和RhB之间的静电吸引以及Zn-Fe LDH EAC复合物与AB和RhB染料之间的氢键作用，