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Katebe FM, Colinet G, Kyalamakasa JMK, Mubemba MM, Jijakli MH. Application of soil amendments to reduce the transfer of trace metal elements from contaminated soils of Lubumbashi (Democratic Republic of the Congo) to vegetables. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:902. [PMID: 39240423 PMCID: PMC11379750 DOI: 10.1007/s10661-024-13029-8] [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: 01/09/2024] [Accepted: 08/15/2024] [Indexed: 09/07/2024]
Abstract
The extraction of copper and cobalt from mines has led to the contamination of agricultural soils by trace metal elements (TMEs) (e.g. Cu: 204 to 1355 mg/kg). The mining industry is one of the sources of metal discharges into the environment, contributing to water, soil, and air contamination and causing metabolic disorders in the inhabitants of the city of Lubumbashi (R.D. Congo). This study assessed the effectiveness of organocalcareous soil improvers applied to TME-contaminated soils to reduce their transfer to plants. Following a factorial design, increasing doses of organic soil improvers (chicken droppings and sawdust) and agricultural lime were applied to the soils of three market gardens (high, medium, and low Cu contamination). The experiment was monitored for 60 days. Soil physicochemical properties (pH, TOC, and total and available copper, cobalt, lead, cadmium, and zinc (mg/kg)) were determined for the three gardens and in the vegetable biomass. The daily consumption index of the vegetables was determined based on total TME content. The results show that organocalcareous soil improvers did not promote plant growth and survival on soils with high and medium levels of copper contamination. However, on soils with low copper content, organocalcareous soil improvers improved germination and plant survival and reduced the transfer of metals from the soil to the plants. The best germination and plant survival rates were obtained with the lightly contaminated market garden. In addition, the organo-limestone amendments applied to the soils slightly increased the soil pH from acidic to slightly acidic, with pH values ranging from (5.43 ± 0.07 to 7.26 ± 0.33). The daily vegetable consumption index obtained for cobalt in the low-contaminated garden ranged from (0.029 to 0.465 mg/60 kg/day), i.e. from 0.5 to 8.45 times higher than the FAO/WHO limit, unlike the other trace metals (Cd, Cu and Pb) for which the daily consumption index found was lower than the FAO/WHO limit. Organocalcareous soil improvers can only be applied to soils with low levels of TME contamination, but for soils with medium to high levels of metal contamination, new soilless production techniques such as hydroponics or bioponics are needed.
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Affiliation(s)
- Félicien Mununga Katebe
- Centre de Recherches en Agriculture Urbaine (C-RAU), Gembloux Agro-Bio Tech, University of Liège, Passage Des Déportés 2, 5030, Gembloux, Belgium.
- Ecology, Ecological Restoration and Landscape, Agronomy Faculty, University of Lubumbashi, Route Kasapa, Campus Universitaire, Lubumbashi, Kinshasa, Congo.
| | - Gilles Colinet
- Water, Soil & Plant Exchanges TERRA, Gembloux Agro-Bio Tech, University of Liège, Passage Des Déportés 2, 5030, Gembloux, Belgium
| | - Jean-Marc Kaumbu Kyalamakasa
- Ecology, Ecological Restoration and Landscape, Agronomy Faculty, University of Lubumbashi, Route Kasapa, Campus Universitaire, Lubumbashi, Kinshasa, Congo
| | - Michel Mpundu Mubemba
- Ecology, Ecological Restoration and Landscape, Agronomy Faculty, University of Lubumbashi, Route Kasapa, Campus Universitaire, Lubumbashi, Kinshasa, Congo
| | - M Haïssam Jijakli
- Centre de Recherches en Agriculture Urbaine (C-RAU), Gembloux Agro-Bio Tech, University of Liège, Passage Des Déportés 2, 5030, Gembloux, Belgium
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Miras M, García MS, Martínez V, Ortuño JÁ. Inexpensive ion-selective electrodes for the simultaneous monitoring of potassium and nitrate concentrations in nutrient solutions. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3511-3520. [PMID: 34269358 DOI: 10.1039/d1ay00956g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A fast, simple and inexpensive potentiometric method has been developed for the determination of the major ions potassium and nitrate in nutrient solutions, by means of ion-selective electrodes (ISEs) based on plasticized polyvinyl membranes containing an ion-exchanger. Tridodecylmethylammonium chloride (TDMACl) and potassium tetrakis(4-chlorophenyl)borate (KTClPB) were used as ion-exchangers for the nitrate and potassium electrodes, respectively. Electrode membranes built with different plasticizers, bis-[2-ethylhexyl]-sebacate (DOS), tricresyl phosphate (TCP) and 2-nitrophenyloctyl ether (NPOE), were tested, and NPOE was selected. The electrodes were calibrated over both wide and narrow concentration ranges and residual analysis was made. Based on the results of these calibrations, the method of standard addition was developed and found to be suitable for the simultaneous determination of potassium and nitrate in nutrient solutions. A large group of samples taken from different stages of hydroponic crops was analysed. Several approaches recommended for statistical comparisons of the results obtained by potentiometric and by reference methods were tested, obtaining satisfactory results. The potentiometric methodology developed is promising for monitoring the concentration of these essential nutrients in nutrient solutions.
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Affiliation(s)
- Marina Miras
- Department of Analytical Chemistry, University of Murcia, Faculty of Chemistry, Spain.
| | - María Soledad García
- Department of Analytical Chemistry, University of Murcia, Faculty of Chemistry, Spain.
| | - Vicente Martínez
- Department of Plant Nutrition, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Espinardo, Murcia 30100, Spain
| | - Joaquín Ángel Ortuño
- Department of Analytical Chemistry, University of Murcia, Faculty of Chemistry, Spain.
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Xu F, Wang P, Bian S, Wei Y, Kong D, Wang H. A Co-Nanoparticles Modified Electrode for On-Site and Rapid Phosphate Detection in Hydroponic Solutions. SENSORS (BASEL, SWITZERLAND) 2021; 21:E299. [PMID: 33466240 PMCID: PMC7794852 DOI: 10.3390/s21010299] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/27/2020] [Accepted: 12/31/2020] [Indexed: 11/16/2022]
Abstract
Conventional strategies for determining phosphate concentration is limited in efficiency due to the cost, time, and labor that is required in laboratory analysis. Therefore, an on-site and rapid detection sensor for phosphate is urgently needed to characterize phosphate variability in a hydroponic system. Cobalt (Co) is a highly sensitive metal that has shown a selectivity towards phosphate to a certain extent. A disposable phosphate sensor based on the screen-printed electrode (SPE) was developed to exploit the advantages of Co-nanoparticles. A support vector machine regression model was established to predict the concentration of phosphate in the hydroponic solutions. The results showed that Co-nanoparticles improve the detection limit of the sensor in the initial state. Meanwhile, the corrosion of Co-nanoparticles leads to a serious time-drift and instability of the electrodes. On the other hand, the coefficient of variation of the disposable phosphate detection chip is 0.4992%, the sensitivity is 33 mV/decade, and the linear range is 10-1-10-4.56 mol/L. The R2 and mean square error of the buffer-free sensor in the hydroponic solution are 0.9792 and 0.4936, respectively. In summary, the SPE modified by the Co-nanoparticles is a promising low-cost sensor for on-site and rapid measurement of the phosphate concentration in hydroponic solutions.
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Affiliation(s)
- Feng Xu
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; (F.X.); (S.B.); (Y.W.); (H.W.)
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230009, Anhui, China
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA;
| | - Peng Wang
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA;
| | - Shiyuan Bian
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; (F.X.); (S.B.); (Y.W.); (H.W.)
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230009, Anhui, China
| | - Yuliang Wei
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; (F.X.); (S.B.); (Y.W.); (H.W.)
- Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230009, Anhui, China
| | - Deyi Kong
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; (F.X.); (S.B.); (Y.W.); (H.W.)
| | - Huanqin Wang
- Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; (F.X.); (S.B.); (Y.W.); (H.W.)
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