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Lang X, Yu K, Zhao Z, Chen Y, Tian J, Zhang M, Wang Y. Vertical distribution, environmental occurrence, and risk assessment of organic pollutants in lacustrine sediments in southeast China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:51206-51216. [PMID: 36809627 DOI: 10.1007/s11356-023-25712-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 01/31/2023] [Indexed: 04/16/2023]
Abstract
To clarify the impact of human activities on the natural environment, as well as the current ecological risks to the environment surrounding Zhushan Bay in Taihu Lake, the characteristics of deposited organic materials, including elements and 16 polycyclic aromatic hydrocarbons (∑16PAHs), in a sediment core from Taihu Lake were determined. The nitrogen (N), carbon (C), hydrogen (H), and sulfur (S) contents ranged from 0.08 to 0.3%, 0.83 to 3.6%, 0.63 to 1.12%, and 0.02 to 0.24%, respectively. The most abundant element in the core was C followed by H, S, and N, while elemental C and the C/H ratio displayed a decreasing trend with depth. The ∑16PAH concentration was in the range of 1807.48-4674.83 ng g-1, showing a downward trend with depth, with some fluctuations. Three-ring PAHs dominated in surface sediment, while 5-ring PAHs dominated at a depth of 55-93 cm. Six-ring PAHs appeared in the 1830s and gradually increased over time before slowly decreasing from 2005 onward due to the establishment of environmental protection measures. The ratio of PAH monomers indicated that PAHs in samples from a depth of 0 to 55 cm were mainly derived from the combustion of liquid fossil fuels, while the PAHs in the deeper samples mainly originated from petroleum. The results of a principal component analysis (PCA) showed that the PAHs in the sediment core of Taihu Lake were mainly derived from the combustion of fossil fuels, such as diesel, petroleum, gasoline, and coal. The contributions of biomass combustion, liquid fossil fuel combustion, coal combustion, and unknown source were 8.99%, 52.68%, 1.65%, and 36.68%, respectively. The results of a toxicity analysis indicated that most of the PAH monomers had little impact on the ecology, and the annual increase of a small number of monomers might have toxic effects on the biological community, resulting in a serious ecological risks, that requires the imposition of control measures.
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Affiliation(s)
- Xiulu Lang
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
- Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing, 210023, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China
| | - Kangkang Yu
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
| | - Zihan Zhao
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
| | - Yan Chen
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
| | - Jiming Tian
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
| | - Mingli Zhang
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China
| | - Yanhua Wang
- School of Geography, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, Qixia, China.
- Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing, 210023, China.
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China.
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Yang X, Li J, Lai JL, Zhang Y, Luo XG. Adsorption and enrichment of U in a cellulase-producing Trichoderma sp. and its physiological response mechanism. CHEMOSPHERE 2022; 287:132173. [PMID: 34509764 DOI: 10.1016/j.chemosphere.2021.132173] [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: 05/25/2021] [Revised: 08/21/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
The cellulase produced by Trichoderma sp. was characterized by investigating the adsorption and enrichment of U and the physiological response to U exposure. The effects of U exposure (0 and 400 μM) on the growth, morphological characteristics, cellulase production, U adsorption, and U enrichment capacity of the Trichoderma strain were assessed. The effects of U exposure on the basic metabolism of this fungus were also analyzed by non-targeted metabolomics. Exposure to U (400 μM) for 24 h resulted in OD600 turbidity of 0.278, and activities of carboxymethyl cellulase (CMC), filter paper enzyme (FPA), and β-glucosidase of 12834 U·mL-1, 9285 U·mL-1, and 12574 U·mL-1, respectively. The measurement of the background α and β radioactivity showed an α activity concentration of 3.35 × 106 Bq·kg-1 in the fungus, a β activity concentration of 6.28 × 105 Bq·kg-1, and a U enrichment rate of 70.4 ± 4.5%. GC-MS metabolomics analysis identified a total of 319 metabolites (34 up-regulated and 30 down-regulated), which mainly caused the metabolic imbalance of organic acids and derivatives. The alanine, aspartate, and glutamate metabolic pathways were the most significantly enriched. Trichoderma sp. therefore has a strong ability to tolerate/accumulate U and continues to produce cellulase under U (400 μM) exposure. However, U interferes with the basic metabolism of this fungus.
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Affiliation(s)
- Xu Yang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jie Li
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jin-Long Lai
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China; Engineering Research Center of Biomass Materials, Ministry of Education of SWUST, Mianyang, 621010, China.
| | - Yu Zhang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Xue-Gang Luo
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
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Godwyn-Paulson P, Jonathan MP, Rodríguez-Espinosa PF, Rodríguez-Figueroa GM. Rare earth element enrichments in beach sediments from Santa Rosalia mining region, Mexico: An index-based environmental approach. MARINE POLLUTION BULLETIN 2022; 174:113271. [PMID: 34968827 DOI: 10.1016/j.marpolbul.2021.113271] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Baseline data on concentration, fractionation, pollution level and ecological risk index for seventeen beach sediments from Santa Rosalia mining region of Baja California Sur, Mexico were assessed. Higher concentrations of Rare Earth Elements (REEs) (mean. 341.49 μg/g) indicated that it is higher than most of the mining regions around the world. Normalization pattern showed enrichment of Eu (>4) and calculated geochemical indices revealed that light and middle REEs are moderately polluted with most of the sampling points located closer to the river discharge. Potential Ecological Risk Index (PERI) showed that Eu (20.2), Tb (20.88), and Lu (28.57) pose moderate ecological risk to the soil at selected stations (10, 11, 15 and 16) with a risk index value ranging from 245 to 359. Pearson's correlation matrix suggested that all REEs are highly correlated (r2 0.95) with each other having similar geochemical characteristics and indicating identical source due to continuous mining activity.
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Affiliation(s)
- P Godwyn-Paulson
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340 Ciudad de México, Mexico
| | - M P Jonathan
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340 Ciudad de México, Mexico.
| | - P F Rodríguez-Espinosa
- Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio la Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340 Ciudad de México, Mexico
| | - G M Rodríguez-Figueroa
- Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Avenida de IPN s/n, Col. Playa Palo de Santa Rita, Apdo. Postal 592, La Paz, Baja California Sur 23096, Mexico
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Mkandawire M. Biogeochemical behaviour and bioremediation of uranium in waters of abandoned mines. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7740-7767. [PMID: 23354614 DOI: 10.1007/s11356-013-1486-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 01/09/2013] [Indexed: 06/01/2023]
Abstract
The discharges of uranium and associated radionuclides as well as heavy metals and metalloids from waste and tailing dumps in abandoned uranium mining and processing sites pose contamination risks to surface and groundwater. Although many more are being planned for nuclear energy purposes, most of the abandoned uranium mines are a legacy of uranium production that fuelled arms race during the cold war of the last century. Since the end of cold war, there have been efforts to rehabilitate the mining sites, initially, using classical remediation techniques based on high chemical and civil engineering. Recently, bioremediation technology has been sought as alternatives to the classical approach due to reasons, which include: (a) high demand of sites requiring remediation; (b) the economic implication of running and maintaining the facilities due to high energy and work force demand; and (c) the pattern and characteristics of contaminant discharges in most of the former uranium mining and processing sites prevents the use of classical methods. This review discusses risks of uranium contamination from abandoned uranium mines from the biogeochemical point of view and the potential and limitation of uranium bioremediation technique as alternative to classical approach in abandoned uranium mining and processing sites.
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Affiliation(s)
- Martin Mkandawire
- Verschuren Centre for Sustainability in Energy and the Environment, Cape Breton University, P.O. Box 5300, 1250 Grand Lake Road, Sydney, Nova Scotia, Canada, B1P 6L2,
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Shumilin E, Jiménez-Illescas ÁR, López-López S. Anthropogenic contamination of metals in sediments of the Santa Rosalía harbor, Baja California peninsula. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 90:333-337. [PMID: 23277367 DOI: 10.1007/s00128-012-0923-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 12/04/2012] [Indexed: 06/01/2023]
Abstract
To know the environment impact on a harbor of the Santa Rosalía port on the Baja California peninsula, the concentrations of metals (Cd, Co, Cu, Mn, Pb, U and Zn) in harbor sediments were determined for 13 stations and compared with their average upper Earth´s crust abundance. The mean enrichment factors, calculated using Al as a normalizer, were higher than the unity for Ag, Ba, Bi, Cd, Co, Cu, Mn, Ni, Pb, Sb, U, V and Zn. Concentrations of slightly enriched Cd in the sediments are below the effect range low (ERL) sediment quality guidelines value only at three stations. The levels of Pb in the harbor sediments at four stations (1, 6, 9 and 11) are between the ERL (46.7 mg kg(-1)) and the effect range medium (ERM) (218 mg kg(-1)), and Pb content in the rest of the sediment samples is higher than the ERM, demonstrating the high extent of the anthropogenic impact of this metal on the sedimentary environment. The total concentrations of the potentially toxic elements Cu (3,390 ± 804 mg kg(-1)) and Zn (1,916 ± 749 mg kg(-1)) very strongly exceed their ERM, showing a high possibility of toxicological danger for marine biota, living inside or entering the harbor.
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Affiliation(s)
- Evgueni Shumilin
- Centro Interdisciplinario de Ciencias Marinas-Instituto Politécnico Nacional, Av. IPN s/n, colonia Playa Palo de Santa Rita, Apdo postal 592, 23096, La Paz, Baja California Sur, Mexico.
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