In this research, NiAl-LDH was synthesized using the coprecipitation method and modified with biochar and graphite to produce NiAlbiochar and NiAl-graphite composite materials. The adsorbent that has been synthesized is used for the application of adsorption of Fe(II) ions in aqueous solution. The resulting material was characterized by XRD (X-ray Diffraction) analysis, spectrophotometer FT-IR, BET analysis for determine the specific surface area and TG-DTA analysis. XRD diffractogram showed that the NiAl-Biochar and NiAl-graphite composite material had the diffraction pattern characteristic of the precursor. LDH that has been modified will have a larger surface area than the precursor. The surface area of NiAl-biochar reaches 438.942 m2/g and the surface area of NiAl-graphite
reaches 21.595 m2/g. This composite material supports adsorbents with a large adsorption capacity to adsorb metals. Adsorption of Fe (II) using NiAl-Biochar and NiAl-graphite was stable for five regeneration cycles (<75.30%). The Fe(II) ion adsorption process tends to follow the Langmuir isotherm model which has a maximum capacity value (Qmax) of NiAl-Biochar composite material reaching 20 times with a value of 243.902 mg/g and the NiAl-graphite composite reaching 72.464 mg/g, so that the carbon-based composite material is considered effective. adsorbent to remove Fe(II) ion and can increase the stability of the structure for adsorption regeneration. The results of the analysis of thermodynamic parameters showed that the adsorption process was endothermic, took
place spontaneously and the solid-liquid phase interface increased according to the increasing degree of disorder.
 Y. Cao, G. Li, and X. Li, “Graphene/layered double hydroxide nanocomposite: Properties, synthesis, and applications,” Chem. Eng. J., vol. 292, no. January 2019, pp. 207–223, 2016, doi: 10.1016/j.cej.2016.01.114.
 T. Taher, M. M. Christina, M. Said, N. Hidayati, F. Ferlinahayati, and A. Lesbani, “Removal of iron(II) using intercalated Ca/Al layered double hydroxides with [-SiW12O40]4-,” Bull. Chem. React. Eng. & Catal., vol. 14, no. 2, pp. 260–267, 2019, doi: 10.9767/bcrec.14.2.2880.260-267.
 A. Lesbani, N. R. Palapa, R. J. Sayeri, T. Taher, and N. Hidayati, “High Reusability of NiAl LDH / Biochar Composite in the Removal Methylene Blue from Aqueous Solution,” vol. 21, no. 2, pp. 421–434, 2021, doi: 10.22146/ijc.56955.
 P. V. dos Santos Lins, D. C. Henrique, A. H. Ide, C. L. de Paiva e Silva Zanta, and L. Meili, “Evaluation of caffeine adsorption by MgAl-LDH/biochar composite,” Environ. Sci. Pollut. Res., vol. 26, no. 31, pp. 31804–31811, 2019, doi: 10.1007/s11356-019-06288-3.
 Z. Hu, L. Cai, J. Liang, X. Guo, W. Li, and Z. Huang, “Green synthesis of expanded graphite/layered double hydroxides nanocomposites and their application in adsorption removal of Cr(VI) from aqueous solution,” J. Clean. Prod., vol. 209, no. VI, pp. 1216–1227, 2019, doi: 10.1016/j.jclepro.2018.10.295.
 J. L. S. Gascho, S. F. Costa, A. A. C. Recco, and S. H. Pezzin, “Graphene oxide films obtained by vacuum filtration: X-ray diffraction evidence of crystalline reorganization,” J. Nanomater., vol. 2019, pp. 12–16, 2019, doi: 10.1155/2019/5963148.
 Y. Tan et al., “Sorption of cadmium onto Mg-Fe Layered Double Hydroxide (LDH)-Kiwi branch biochar,” Environ. Pollut. Bioavailab., vol. 31, no. 1, pp. 189–197, 2019, doi: 10.1080/26395940.2019.1604165.
 I. Lee, G. H. Jeong, S. An, S. W. Kim, and S. Yoon, “Facile synthesis of 3D MnNi-layered double hydroxides (LDH)/graphene composites from directly graphites for pseudocapacitor and their electrochemical analysis,” Appl. Surf. Sci., vol. 429, pp. 196–202, 2018, doi: 10.1016/j.apsusc.2017.06.259.
 M. Zubair, M. Daud, G. McKay, F. Shehzad, and M. A. Al-Harthi, “Recent progress in layered double hydroxides (LDH)-containing hybrids as adsorbents for water remediation,” Appl. Clay Sci., vol. 143, no. 03, pp. 279–292, 2017, doi: 10.1016/j.clay.2017.04.002.
 W. Linghu, H. Yang, Y. Sun, G. Sheng, and Y. Huang, “One-pot synthesis of LDH / GO composites as high effective adsorbent for the decontamination of U ( VI ) One-pot synthesis of LDH / GO composites as high effective adsorbent for the decontamination of U ( VI ),” ACS Sustain. Chem. Eng., vol. 1, no. VI, pp. 1–31, 2017.
 H. Hu et al., “NiFe-LDH nanosheet/carbon fiber nanocomposite with enhanced anionic dye adsorption performance,” Appl. Surf. Sci., vol. 511, no. 01, p. 145570, 2020, doi: 10.1016/j.apsusc.2020.145570.
 L. Wang, A. Li, and Y. Chang, “Hydrothermal treatment coupled with mechanical expression at increased temperature for excess sludge dewatering: Heavy metals, volatile organic compounds and combustion characteristics of hydrochar,” Chem. Eng. J., vol. 297, pp. 1–10, 2016, doi: 10.1016/j.cej.2016.03.131.
 A. H. Tyas, T. A. Zaharah, and A. Shofiyani, “Penentuan kemampuan penggunaan ulang komposit kitosan-karbon pada proses adsorpsi Ce(VI),” J. Kim. Khatulistiwa, vol. 7, no. 2, pp. 61–68, 2018.
 O. Alagha, M. S. Manzar, M. Zubair, I. Anil, N. D. Mu’azu, and A. Qureshi, “Comparative adsorptive removal of phosphate and nitrate from wastewater using biochar-MgAl LDH nanocomposites: Coexisting anions effect and mechanistic studies,” Nanomaterials, vol. 10, no. 2, pp. 1–15, 2020, doi: 10.3390/nano10020336.
 V. Kovalenko, V. Kotok, A. Yeroshkina, and A. Zaychuk, “Synthesis and characterisation of dyeintercalated nickel-aluminium layereddouble hydroxide as a cosmetic pigment,” Eastern-European J. Enterp. Technol., vol. 5, no. 12–89, pp. 27–33, 2017, doi: 10.15587/1729-4061.2017.109814.
 N. R. Palapa, T. Taher, B. R. Rahayu, and R. Mohadi, “CuAl LDH / Rice Husk Biochar Composite for Enhanced Adsorptive Removal of Cationic Dye from Aqueous Solution,” vol. 15, no. 2, pp. 525–537, 2020, doi: 10.9767/bcrec.15.2.7828.525-537.
 E. E. Mon, “Study on the Silica from Rice Husk Ash by XRD and XRF,” Int. J. Sci. Eng. Res., vol. 9, no. 6, pp. 1535–1537, 2018.
 E. Kusrini, A. Suhrowati, A. Usman, M. Khalil, and V. Degirmenci, “Synthesis and characterization of graphite oxide, graphene oxide, and reduced graphene oxide from graphite waste using modified hummers’ method and zinc as reducing agent,” Int. J. Technol., vol. 10, no. 6, pp. 1093–1104, 2019, doi: 10.14716/ijtech.v10i6.3639.
 S. S. Ravuru, A. Jana, and S. De, “Synthesis of NiAl- layered double hydroxide with nitrate intercalation: Application in cyanide removal from steel industry effluent,” J. Hazard. Mater., vol. 373, no. January, pp. 791–800, 2019, doi: 10.1016/j.jhazmat.2019.03.122.
 N. R. Palapa, T. Taher, R. Mohadi, A. Rachmat, and A. Lesbani, “Preparation of copper aluminum-biochar composite as adsorbent of malachite green in aqueous solution,” no. 524, pp. 1–24, 2020, doi: 10.21203/rs.3.rs-18799/v1.
 W. Linghu, H. Yang, Y. Sun, G. Sheng, and Y. Huang, “One-Pot Synthesis of LDH/GO Composites as Highly Effective Adsorbents for Decontamination of U(VI),” ACS Sustain. Chem. Eng., vol. 5, no. 6, pp. 5608–5616, 2017, doi: 10.1021/acssuschemeng.7b01303.
 H. Lyu, K. Hu, J. Fan, Y. Ling, Z. Xie, and J. Li, 3D hierarchical layered double hydroxide/carbon spheres composite with hollow structure for high adsorption of dye, vol. 500. Elsevier B.V, 2020.
 A. H. Wazir, I. U. Wazir, and A. M. Wazir, “Preparation and characterization of rice husk based physical activated carbon,” Energy Sources, Part A Recover. Util. Environ. Eff., vol. 00, no. 00, pp. 1–11, 2020, doi: 10.1080/15567036.2020.1715512.
 N. R. Palapa, T. Taher, B. R. Rahayu, R. Mohadi, A. Rachmat, and A. Lesbani, “CuAl LDH/Rice husk biochar composite for enhanced adsorptive removal of cationic dye from aqueous solution,” Bull. Chem. React. Eng. Catal., vol. 15, no. 2, pp. 525–537, 2020, doi: 10.9767/bcrec.15.2.7828.525-537.
 Z. Tang, Z. Qiu, S. Lu, and X. Shi, “Functionalized layered double hydroxide applied to heavy metal ions absorption: A review,” Nanotechnol. Rev., vol. 9, no. 1, pp. 800–819, 2020, doi: 10.1515/ntrev-2020-0065.
 A. O. Dada, F. A. Adekola, and E. O. Odebunmi, “ Kinetics, mechanism, isotherm and thermodynamic studies of liquid phase adsorption of Pb 2+ onto wood activated carbon supported zerovalent iron (WAC-ZVI) nanocomposite ,” Cogent Chem., vol. 3, no. 1, p. 1351653, 2017, doi: 10.1080/23312009.2017.1351653.
 U. A. Edet and A. O. Ifelebuegu, “Wastewater Using Recycled Brick Waste,” vol. 8, no. 665, pp. 1–15, 2020.
 I. P.M.O., K. F.L., O. C.A., O. A.C., and O. P.I., “Isothermal, Kinetic and Thermodynamic Studies of the Adsorption of Erythrosine Dye onto Activated Carbon from Periwinkle Shell,” Int. J. Adv. Eng. Manag. Sci., vol. 3, no. 10, pp. 977–984, 2017, doi: 10.24001/ijaems.3.10.1.
 R. Antonelli, G. R. P. Malpass, M. G. C. Da Silva, and M. G. A. Vieira, “Adsorption of ciprofloxacin onto thermally modified bentonite clay: Experimental design, characterization, and adsorbent regeneration,” J. Environ. Chem. Eng., vol. 8, no. 6, p. 104553, 2020, doi: 10.1016/j.jece.2020.104553.
 R. Lafi, I. Montasser, and A. Hafiane, “Adsorption of congo red dye from aqueous solutions by prepared activated carbon with oxygen-containing functional groups and its regeneration,” Adsorpt. Sci. Technol., vol. 37, no. 1–2, pp. 160–181, 2019, doi: 10.1177/0263617418819227.