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Zhao X, Wang Q, Sun Y, Li H, Lei Z, Zheng B, Xia H, Su Y, Ali KMY, Wang H, Hu F. An eco-friendly porous hydrogel adsorbent based on dextran/phosphate/amino for efficient removal of Be(II) from aqueous solution. Int J Biol Macromol 2024; 269:131851. [PMID: 38692543 DOI: 10.1016/j.ijbiomac.2024.131851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/05/2024] [Accepted: 04/23/2024] [Indexed: 05/03/2024]
Abstract
A novel environmentally-friendly porous hydrogel adsorbent (GHPN) is firstly designed and prepared using dextran, phosphate, and calcium hydroxide for the adsorption of Be(II). GHPN shows good adsorption selectivity for Be(II) (Kd = 1.53 × 104 mL/g). According the adsorption kinetics and thermodynamics, the theoretical adsorption capacity of GHPN to Be(II) is 43.75 mg/g (35 °C, pH = 6.5), indicating a spontaneous exothermic reaction. After being reused for 5 cycles, the adsorption and desorption efficiencies of Be(II) with GHPN are obtained to be more than 80 %, showing acceptable recycling performance. Both of the characterizations and theoretical calculations indicate that the phosphate group, hydroxyl group, and amino group own the affinity to form stable complexes with Be(II). Benefiting from the introduction of phosphate and amino, the adsorption effect of the hydrogel adsorbent on Be(II) can be greatly improved, and surface precipitation, complexation, and ligand exchange are the dominant mechanisms of beryllium adsorption. The results suggest that GHPN has great potential to be utilized as an eco-friendly and useful adsorbent of Be(II) from aqueous solution.
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Affiliation(s)
- Xu Zhao
- School of Nuclear Science and Technology, University of South China, Hengyang 421001, Hunan, China
| | - Qingliang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Yige Sun
- College of Resources and Environment, Anhui Agricultural University, Hefei 230000, Anhui, China
| | - Haoshuai Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Zhiwu Lei
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Boyuan Zheng
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Hongyang Xia
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Yucheng Su
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Kham Muhammad Yaruq Ali
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China
| | - Hongqiang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China; College of Resources and Environment, Anhui Agricultural University, Hefei 230000, Anhui, China
| | - Fang Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, Hunan, China.
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Su Y, Zhao X, Sun Y, Dong Y, Wang W, Li H, Hu F, Wang Q. Porous durian shell biochar modified by KMnO 4 (Mn-DSB) as a highly selective adsorbent for Be(II). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33003-8. [PMID: 38532218 DOI: 10.1007/s11356-024-33003-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 03/16/2024] [Indexed: 03/28/2024]
Abstract
The mining of uranium-beryllium ores has resulted in substantial beryllium (Be) contamination. In this study, agricultural waste durian shells were utilized as raw materials to prepare biochar, which was further modified to enhance its adsorption capacity (Mn-DSB). The results effectively demonstrated Mn loading onto the DSB surface. Batch experiments were conducted to identify the optimal adsorption conditions of Mn-DSB for beryllium. At a temperature of 35 °C and pH 6, beryllium's maximum adsorption capacity (Qe) was 42.08 mg·g-1. The materials' internal structure was analyzed before and after adsorption via multiple techniques. Mn-DSB manifested potent selectivity towards beryllium in multicomponent mixed solutions, binary systems, and uranium-beryllium wastewater, as the beryllium removal rate exceeded 90%. The study investigated the recyclability of Mn-DSB and found that after five reuse cycles, the adsorption and desorption efficiencies were 90% and 85%, respectively. The strong ligand complexation (N-H, CO32-, -OH) and ion exchange mechanisms (with Mn7+ ions) of Mn-DSB explained its high adsorption capacity. Therefore, this study demonstrates the potential of Mn-DSB for treating uranium-beryllium tailing wastewater.
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Affiliation(s)
- Yucheng Su
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Xu Zhao
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, Hunan, China
| | - Yige Sun
- College of Chinese Language and Literature, Luoyang Normal University, Luoyang, 471934, Henan, China
| | - Yuexiang Dong
- School of Clinical Medicine, Hebei University, Baoding, 071002, Hebei, China
| | - Weiliang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Haoshuai Li
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Fang Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Qingliang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China.
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Zhao X, Su Y, Hao X, Wang H, Hu E, Hu F, Lei Z, Wang Q, Xu L, Zhou C, Fan S, Liu X, Dong S. Effect of mechanical-chemical modification on adsorption of beryllium by calcite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:125241-125253. [PMID: 37140871 DOI: 10.1007/s11356-023-27275-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/24/2023] [Indexed: 05/05/2023]
Abstract
The treatment of beryllium wastewater has become a major problem in industry. In this paper, CaCO3 is creatively proposed to treat beryllium-containing wastewater. Calcite was modified by an omnidirectional planetary ball mill by a mechanical-chemical method. The results show that the maximum adsorption capacity of CaCO3 for beryllium is up to 45 mg/g. The optimum treatment conditions were pH = 7 and the amount of adsorbent was 1 g/L, and the best removal rate was 99%. The concentration of beryllium in the CaCO3-treated solution is less than 5 μg/L, which meets the international emission standard. The results show that the surface co-precipitation reaction between CaCO3 and Be (II) mainly occurs. Two different precipitates are generated on the used-CaCO3 surface; one is the tightly connected Be (OH)2 precipitation, and the other is the loose Be2(OH)2CO3 precipitation. When the pH of the solution exceeds 5.5, Be2+ in the solution is first precipitated by Be (OH)2. After CaCO3 is added, CO32- will further react with Be3(OH)33+ to form Be2(OH)2CO3 precipitation. CaCO3 can be considered as an adsorbent with great potential to remove beryllium from industrial wastewater.
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Affiliation(s)
- Xu Zhao
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, Hunan, China
| | - Yucheng Su
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Xuanzhang Hao
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Hongqiang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Eming Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Fang Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Zhiwu Lei
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Qingliang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China.
| | - Lechang Xu
- Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Tongzhou District, Beijing, 101149, China
| | - Chunze Zhou
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Shiyao Fan
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Xinwei Liu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Shuai Dong
- Taiyuan Railway Construction Co., Ltd. of China Railway Sixth Bureau Group, Taiyuan, 030000, China
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