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High Structural Stability and Adsorption Capacity of Zn/Al-Biochar and Cu/Al-Biochar Toward Adsorption of Cr(VI)
Neza Rahayu Palapa 1  
,   Tarmizi Taher 2, 3  
,   Patimah Mega Syah Bahar Nur Siregar 4  
,   Normah Normah 4  
,   Novie Juleanti 4  
,   Alfan Wijaya 4  
,   Arini Fousty Badri 1  
,   Aldes Lesbani 1, 2  
 
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1
Graduate School, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Palembang-Prabumulih, Km. 32, Ogan Ilir, South Sumatera, Indonesia
2
Research Center of Inorganic Materials and Complexes, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl.Padang Selasa Bukit Besar Palembang 30139, South Sumatera, Indonesia
3
Department of Environmental Engineering, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Way Hui, Kecamatan Jati Agung, Lampung Selatan 35365, Indonesia
4
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Padang Selasa No. 524 Ilir Barat 1, Palembang-South Sumatera, Indonesia
CORRESPONDING AUTHOR
Aldes Lesbani   

universitas Sriwijaya
Publication date: 2021-04-01
 
J. Ecol. Eng. 2021; 22(4):213–223
 
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ABSTRACT
Layered double hydroxide (LDH) Zn/Al and Cu/Al was synthesized by using the coprecipitation method under base condition at pH 10 following with formation of composites based on biochar (BC) to form Zn/Al-BC and Cu/Al-BC. The materials were characterized by XRD, FTIR, BET, and thermal analyses. Furthermore, materials was applied as adsorbent of Cr(VI) on aqueous solution. The performance of composites as adsorbent was evaluated by reusability of adsorbent toward Cr(VI) adsorption process. The results showed that Cu/Al-BC and Zn/Al-BC can reuse the re-adsorption process with the adsorption ability of more than 60%. The adsorption capacity of Cu/Al-BC and Zn/Al-BC was higher than that of starting materials and up to 384.615 mg/g for Cu/Al-BC and 666.667 mg/g for Zn/Al-BC. Both composites showed the potential adsorbents to remove Cr(VI) from aqueous solution.