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Jules Christophe MK, Marlène YT, Valery Jean François N, Merlin NN, Inocent G, Mathieu N. Assessment of cooking methods and freezing on the nutritional value and health risks of heavy metals in four fish species consumed in Douala, Cameroon. Heliyon 2024; 10:e28316. [PMID: 38576585 PMCID: PMC10990866 DOI: 10.1016/j.heliyon.2024.e28316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 03/13/2024] [Accepted: 03/15/2024] [Indexed: 04/06/2024] Open
Abstract
The effects of smoking, boiling and freezing on the nutritional value and health risks of heavy metals in four fish species consumed in Douala was investigated. Fish samples from Cyprinus carpio, Arius parkii, Ethmalosa fimbriata and Polydactilis quadrifilis were collected at the Douala Fishing seaport, carried to the laboratory, washed with distilled water and processed. Proximate composition, mineral content, heavy metals and lipid quality were analyzed using AOAC standard methods. Estimated Daily Intake (EDI), Targeted Hazard Quotient (THQ), Hazard Index (HI) and Carcinogenic Risk (CR) were used to estimate the human health risk. Results showed that smoking and boiling increased significantly (P < 0.05) protein and ash levels. Lipid were reduced significantly (P < 0.05) with boiling and freezing compared to raw and smoked sample. Smoking increased significantly (P < 0.05) cadmium, lead, mercury and arsenic contents compared to boiling and freezing. EDI values of cadmium in all species of fish smoked were not acceptable for human consumption. THQ values of mercury in raw, smoked, boiled and frozen were not acceptable for human consumption. HI suggested a non potential carcinogenic effect for all fish while CR for cadmium and arsenic suggested a carcinogenic health risk for Arius parkii (smoked and boiled). All treatment decreased significantly (P < 0.05) iodine value and increased acid, peroxide, anisidine values, thiobarbituric acid reactive substances and total oxidation index compared to raw fish. Boiling was the best cooking method compared to smoking.
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Affiliation(s)
| | - Youogo Tegueu Marlène
- Laboratory of Biochemistry, Faculty of Science, University of Douala, Po Box 24157, Douala, Cameroon
| | | | - Nchoutpouen Ngafon Merlin
- Laboratory of Biochemistry, Faculty of Science, University of Douala, Po Box 24157, Douala, Cameroon
| | - Gouado Inocent
- Laboratory of Biochemistry, Faculty of Science, University of Douala, Po Box 24157, Douala, Cameroon
| | - Ndomou Mathieu
- Laboratory of Biochemistry, Faculty of Science, University of Douala, Po Box 24157, Douala, Cameroon
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Liu Q, Ding Y, Lai Y, Long Y, Shi H, Liu M. The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term. TOXICS 2024; 12:157. [PMID: 38393252 PMCID: PMC10892406 DOI: 10.3390/toxics12020157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/06/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024]
Abstract
This study investigated the impact of soil colloidal characteristics on the transfer patterns of different Cu and Cd speciation in contaminated soil treated with three different amendments: lime (L), zero-valent iron (ZVI), and attapulgite (ATP). It seeks to clarify the activation hazards and aging processes of these modifications on Cu and Cd. Compared with the control (CK), the available Cu concentrations treated with amendments reduced in the short term (6 months) by 96.49%, 5.54%, and 89.78%, respectively, and Cd declined by 55.43%, 32.31%, and 93.80%, respectively. Over a 12-year period, there was no significant change in the immobile effect with L, while Cu and Cd fell by 19.06% and 40.65% with ZVI and by 7.63% and 40.78% with ATP. Short- and long-term increases in the readily reducible iron and manganese oxide fraction of Cu and Cd were accompanied by a considerable rise in the concentrations of amorphous iron oxide in the soil and colloid after amendment treatment. This suggested that Cu and Cd were immobilized and stabilized in part by amorphous iron oxide.
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Affiliation(s)
- Qing Liu
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China; (Q.L.); (Y.L.); (Y.L.)
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;
| | - Yuan Ding
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China; (Q.L.); (Y.L.); (Y.L.)
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;
| | - Yuqi Lai
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China; (Q.L.); (Y.L.); (Y.L.)
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;
| | - Yan Long
- College of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China; (Q.L.); (Y.L.); (Y.L.)
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;
| | - Hong Shi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China;
- Jiangxi Key Laboratory of Agricultural Efficient Water-Saving and Non-Point Source Pollution Preventing, Jiangxi Central Station of Irrigation Experiment, Nanchang 330063, China
| | - Min Liu
- Jiangxi Ecological Environment Monitoring Center, Nanchang 330039, China
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Du Y, Tian Z, Zhao Y, Wang X, Ma Z, Yu C. Exploring the accumulation capacity of dominant plants based on soil heavy metals forms and assessing heavy metals contamination characteristics near gold tailings ponds. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119838. [PMID: 38145590 DOI: 10.1016/j.jenvman.2023.119838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/10/2023] [Accepted: 11/28/2023] [Indexed: 12/27/2023]
Abstract
Heavy metal contamination of soil commonly accompanies problems around gold mine tailings ponds. Fully investigating the distribution characteristics of heavy metals and the survival strategies of dominant plants in contaminated soils is crucial for effective pollution management and remediation. This study aims to investigate the contamination characteristics, sources of heavy metals (As, Cd, Pb, Hg, Cu, Zn, Cr, and Ni) in soils around gold mine tailings ponds areas (JHH and WZ) and to clarify the form distribution of heavy metals (As, Cd, Pb, Hg) in contaminated plots as well as their accumulation and translocation in native dominant plants. The results of the study showed that the concentrations of As, Pb, Cd, Cu, and Zn in soil exceeded the national limits at parts of the sampling sites in both study areas. The Nemerow pollution index showed that both study areas reached extreme high pollution levels. Spatial analysis showed that the main areas of contamination were concentrated around metallurgical plants and tailings ponds, with Cd exhibiting the most extensive area of contamination. In the JHH, As (74%), Cd (66%), Pb (77%), Zn (47%) were mainly from tailings releases, and Cu (52%) and Hg (51%) were mainly from gold ore smelting. In the WZ, As (42%), Cd (41%), Pb (73%), Cu (47%), and Zn (41%) were mainly from tailings releases. As, Cd, Pb, and Hg were mostly present in the residue state, and the proportion of water-soluble, ion-exchangeable, and carbonate-bound forms of Cd (19.93%) was significantly higher than that of other heavy metals. Artemisia L. and Amaranthus L. are the primary dominating plants, which exhibited superior accumulation of Cd compared to As, Pb, and Hg, and Artemisia L. demonstrated a robust translocation capacity for As, Pb, and Hg. Compared to the concentrations of other forms of soil heavy metals, the heavy metal content in Artemisia L correlates significantly better with the total soil heavy metal concentration. These results offer additional systematic data support and a deeper theoretical foundation to bolster pollution-control and ecological remediation efforts in mining areas.
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Affiliation(s)
- Yanbin Du
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Zhijun Tian
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Yunfeng Zhao
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Xinrong Wang
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Zizhen Ma
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Caihong Yu
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China.
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Fang X, Yuan W, Li Z, Zhang X, Yu J, Chen J, Wang X, Qiu X. Effect of calcination temperatures on the performance of rectorite for cadmium immobilization in soil: Freeze-thaw, plant growth, and microbial diversity. ENVIRONMENTAL RESEARCH 2023; 216:114838. [PMID: 36402188 DOI: 10.1016/j.envres.2022.114838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The immobilization of cadmium (Cd(II)) in soil using calcined rectorite (REC) was investigated in this research. The results of immobilization show that a small amount of REC calcined at 700 °C (REC-700 °C) could effectively immobilize 90% of Cd(II) in soil, while the immobilization efficiency of REC only reached 42%. Moreover, the immobilization efficiency of REC calcined at 300 °C and 500 °C (REC-300 °C and REC-500 °C) were lower than REC. To investigate the mechanism, the materials before and after immobilization were fully analyzed by Fourier transform infrared spectroscopy (FT-IR), powdery X-ray diffraction analysis (XRD), and scanning electron microscopy (SEM). The results indicate that the structure of REC has been changed after calcination at different temperatures and Cd(II) was successfully immobilized on materials. Losing free water, structural water and OH groups respectively, the layer spacing of REC-300 °C and REC-500 °C was shrunk. However, the crystal structure of REC was destroyed after calcination at 700 °C, resulting in the generation of new phases. According to the XRD result, more cadmium hydroxide (Cd(OH)2) were produced on REC-700 °C, indicating that more OH groups were formed during immobilization. Furthermore, Tessier test demonstrates that Cd(II) in soil changed from exchangeable state and water soluble state to carbonate bound state and iron manganese oxide bound state during immobilization. The result of microbial community indicates that REC-700 °C can restore the microbial composition of Cd(II)-contaminated soil. The effects of pH, freeze-thaw, REC dosage, and initial heavy metal concentration were also evaluated to provide a theoretical basis for the subsequent application of the material in the remediation of contaminated soil.
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Affiliation(s)
- Xing Fang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Wenying Yuan
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Zhenhui Li
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Xiaoxuan Zhang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Junxia Yu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Jinyi Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China; Hubei Engineering Technology Research Center for Chemical Industry Pollution Control, Wuhan, 430205, China
| | - Xiaofeng Wang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China; Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China; Hubei Engineering Technology Research Center for Chemical Industry Pollution Control, Wuhan, 430205, China.
| | - Xinhong Qiu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, China; Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China; Hubei Engineering Technology Research Center for Chemical Industry Pollution Control, Wuhan, 430205, China; Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, Wuhan, 430074, China.
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