1
|
Zhu Y, Wang L, Ma J, Hua Z, Yang Y, Chen F. Assessment of carbon sequestration potential of mining areas under ecological restoration in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 921:171179. [PMID: 38402992 DOI: 10.1016/j.scitotenv.2024.171179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/17/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Mining activities aggravate the ecological degradation and emission of greenhouse gases throughout the world, thereby affecting the global climate and posing a serious threat to the ecological safety. Vegetation restoration is considered to be an effective and sustainable strategy to improve the post-mining soil quality and functions. However, we still have a limited knowledge of the impact of vegetation restoration on carbon sequestration potential in mining areas. In this pursuit, the present study was envisaged to integrate the findings from studies on soil organic carbon (SOC) sequestration in mining areas under vegetation restoration with field monitoring data. The carbon sequestration potential under vegetation restoration in China's mining areas was estimated by using a machine learning model. The results showed that (1) Vegetation restoration exhibited a consistently positive impact on the changes in the SOC reserves. The carbon sequestration potential was the highest in mixed forests, followed by broad-leaved forests, coniferous forests, grassland, shrubland, and farmland; (2) The number of years of vegetation restoration and mean annual precipitation were found to be the important moderating variables affecting the SOC reserves in reclaimed soils in mining areas; (3) There were significant differences in the SOC sequestration potential under different vegetation restoration scenarios in mining areas in China. The SOC sequestration potential reached up to 9.86 million t C a-1, when the soil was restored to the initial state. Based on the meta-analysis, the maximal attainable SOC sequestration potential was found to be 4.26 million t C a-1. The SOC sequestration potential reached the highest level of 12.86 million t C a-1, when the optimal vegetation type in a given climate was restored. The results indicated the importance of vegetation restoration for improving the soil sequestration potential in mining areas. The time lag in carbon sequestration potential for different vegetation types in mining areas was also revealed. Our findings can assist the development of ecological restoration regimens in mining areas to mitigate the global climate change.
Collapse
Affiliation(s)
- Yanfeng Zhu
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221008, China; School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China
| | - Liping Wang
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221008, China
| | - Jing Ma
- School of Public Administration, Hohai University, Nanjing 210000, China
| | - Ziyi Hua
- School of Public Administration, Hohai University, Nanjing 210000, China
| | - Yongjun Yang
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221008, China; School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, China
| | - Fu Chen
- Engineering Research Center of Ministry of Education for Mine Ecological Restoration, China University of Mining and Technology, Xuzhou 221008, China; School of Public Administration, Hohai University, Nanjing 210000, China.
| |
Collapse
|
2
|
Deng J, Li Z, Li B, Xu C, Wang L, Li Y. Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment. TOXICS 2024; 12:279. [PMID: 38668502 PMCID: PMC11053404 DOI: 10.3390/toxics12040279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/29/2024]
Abstract
The diffusion of trace elements in mining wastelands has attracted widespread attention in recent years. Vegetation restoration is an effective measure for controlling the surface migration of trace elements. However, there is no field evidence of the effective riparian zone width in mining wastelands. Three widths (5 m, 7.5 m, and 10 m) of Rhododendron simsii/Lolium perenne L. riparian zones were constructed in lead-zinc mining wastelands to investigate the loss of soil, cadmium (Cd), copper (Cu), arsenic (As), lead (Pb), and zinc (Zn). Asbestos tiles were used to cut off connections between adjacent plots to avoid hydrological interference. Plastic pipes and containers were used to collect runoff water. Results showed that more than 90% of trace elements were lost in sediment during low coverage and heavy rainfall periods. Compared with the 5 m riparian zone, the total trace element loss was reduced by 69-85% during the whole observation period in the 10 m riparian zone and by 86-99% during heavy rain periods in the 10 m riparian zone, which was due to reduction in runoff and concentrations of sediment and trace elements in the 10 m riparian zone. Indirect negative effects of riparian zone width on trace element loss through runoff and sediment concentration were found. These results indicated that the wide riparian zone promoted water infiltration, filtered soil particles, and reduced soil erosion and trace element loss. Riparian zones can be used as environmental management measures after mining areas are closed to reduce the spread of environmental risks in mining wastelands, although the long-term effects remain to be determined.
Collapse
Affiliation(s)
- Jiangdi Deng
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China; (J.D.); (C.X.)
| | - Zuran Li
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming 650201, China;
| | - Bo Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
| | - Cui Xu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China; (J.D.); (C.X.)
| | - Lei Wang
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
| | - Yuan Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; (B.L.); (L.W.)
| |
Collapse
|
3
|
Wang Y, Yu Y, Luo X, Tan Q, Fu Y, Zheng C, Wang D, Chen N. Prioritizing ecological restoration in hydrologically sensitive areas to improve groundwater quality. WATER RESEARCH 2024; 252:121247. [PMID: 38335751 DOI: 10.1016/j.watres.2024.121247] [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: 07/18/2023] [Revised: 01/18/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024]
Abstract
Greening is the optimal way to mitigate climate change and water quality degradation caused by agricultural expansion and rapid urbanization. However, the ideal sites to plant trees or grass to achieve a win-win solution between the environment and the economy remain unknown. Here, we performed a nationwide survey on groundwater nutrients (nitrate nitrogen, ammonia nitrogen, dissolved reactive phosphorus) and heavy metals (vanadium, chromium, manganese, iron, cobalt, nickel, copper, arsenic, strontium, molybdenum, cadmium, and lead) in China, and combined it with the global/national soil property database and machine learning (random forest) methods to explore the linkages between land use within hydrologically sensitive areas (HSAs) and groundwater quality from the perspective of hydrological connectivity. We found that HSAs occupy approximately 20 % of the total land area and are hotspots for transferring nutrients and heavy metals from the land surface to the saturated zone. In particular, the proportion of natural lands within HSAs significantly contributes 8.0 % of the variability in groundwater nutrients and heavy metals in China (p < 0.01), which is equivalent to their contribution (8.8 %) at the regional scale (radius = 4 km, area = 50 km2). Increasing the proportion of natural lands within HSAs improves groundwater quality, as indicated by the significant reduction in the concentrations of nitrate nitrogen, manganese, arsenic, strontium, and molybdenum (p < 0.05). These new findings suggest that prioritizing ecological restoration in HSAs is conducive to achieving the harmony between the environment (improving groundwater quality) and economy (reducing investment in area management).
Collapse
Affiliation(s)
- Yao Wang
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Yiqi Yu
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Xin Luo
- Department of Earth Sciences, The University of Hong Kong, Hong Kong, China; Shenzhen Research Institute (SRI), The University of Hong Kong, Shenzhen, China
| | - Qiaoguo Tan
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Yuqi Fu
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
| | - Chenhe Zheng
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; College of Ocean and Earth Science, Xiamen University, Xiamen, China
| | - Deli Wang
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; College of Ocean and Earth Science, Xiamen University, Xiamen, China.
| | - Nengwang Chen
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China.
| |
Collapse
|
4
|
Wang F, Li W, Wang H, Hu Y, Cheng H. The leaching behavior of heavy metal from contaminated mining soil: The effect of rainfall conditions and the impact on surrounding agricultural lands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169877. [PMID: 38185143 DOI: 10.1016/j.scitotenv.2024.169877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/10/2023] [Accepted: 01/01/2024] [Indexed: 01/09/2024]
Abstract
Contaminated mining soils could lead to heavy metal pollution of surrounding farmlands under rainfall conditions. With the aids of sequential extraction, batch leaching, and dynamic leaching experiments, this study was carried out to investigate the characteristics of heavy metals in contaminated mining soils, understand their leaching behavior under different rainfall conditions, and evaluate the potential effects on surrounding farmlands. The results indicated that the concentrations of heavy metals (Cr, Ni, Cu, Zn, As, Cd, and Pb) in the contaminated mining soils were several or even twenty times higher than their corresponding background values, and Cd, Zn, Cu and Pb had considerable proportions (>50 %) in mobile forms. The leaching amounts of heavy metals from the contaminated mining soils had positive correlation with their contents in acid soluble form, and showed strong dependence on rainfall pH conditions. Acid rainfalls (pH = 4.32) can greatly increase the average annual release of Cd, Zn, Cu and Pb from mine soils in the study area, with increments ranging from 72.4 % (Pb) to 85.9 % (Cd) compared to those under alkaline conditions (pH = 7.42). The leaching of heavy metals was well fitted by two-constant, pseudo second-order and parabolic equations, indicating that their multi-layer sorption/desorption behavior on soil surface was dominated by chemical processes and their release was controlled by the diffusion within the soil pore channels. The two-column leaching experiment showed that the metal-rich leachate can lead to obvious increments of heavy metals in non-residual fractions (in particular Cd in acid soluble form) in surrounding farmlands, which would significantly raise the potential ecological risk associated with heavy metals. These findings indicate the importance of contaminated mining soils as a long-term source of heavy metals and the needs for mitigating the releases of toxic elements, especially in areas with heavy acid precipitation.
Collapse
Affiliation(s)
- Fei Wang
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Wei Li
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Hao Wang
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Yuanan Hu
- MOE Laboratory of Groundwater Circulation and Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Hefa Cheng
- MOE Key Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| |
Collapse
|
5
|
Geochemical and environmental assessment of potential effects of trace elements in soils, water, and sediments around abandoned mining sites in the northern Iberian Peninsula (NW Spain). Heliyon 2023; 9:e14659. [PMID: 36994410 PMCID: PMC10040696 DOI: 10.1016/j.heliyon.2023.e14659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 03/12/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
The mineral deposits and traces in the Iberian Peninsula are very numerous and of varied mineralogy. This study aimed to analyze the geochemical and environmental changes detected in soil, water, and sediments around the La Sierre mine, and to determine if contamination persists over time. The concentrations of ten trace elements (As, Co, Cr, Cu, Fe, Mn, Ni, Pb, V, Zn) were measured in 20 soil samples, 10 water samples, and 6 sediment samples, sampling at the most affected points. Soil and sediment samples were analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and water samples by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). From the Principal Component Analysis (PCA), soil samples SOI-6, 7, and 20 presented high amounts ranging from 14489.86a±7 to 3031.72b ± 1 mg/kg of Co, Cu, Ni, and As, respectively. Water samples WAT-6, 8, and 10 presented high contents of As, Co, Cr, Cu, Fe, Mn, Ni, Pb, V, and Zn, being sample WAT-8 with high values of As, Co, Cu, Fe, and Ni with 48.1 ± 0.82, 368 ± 4, 68.3 ± 0.1, 97.5 ± 1.2, and 152 ± 2 μg/L, respectively, exceeding the regulation given by R.D 314/2016 (Water for human consumption). The sediment samples were compared with the IInterim Sediment Quality Guideline (ISQG) and Probable Effect Level (PEL) values given by the Canadian Sediment Quality Guidelines for the Protection of Aquatic Life. When presenting a high ISQG value, but low PEL, they partially comply with the regulations, which happens with samples SED-1, 2, and 8 for As and SED-5, 6, and 7 for Pb. On the contrary, Cr and Cu do not comply with what is established in samples SED-8 and SED-1 and 8, respectively, whereas, in samples SED-2 and 5, Cu partially complies with the established regulations. The values found for the trace elements present in the abandoned traditional mining area with abundant epithermal deposits prevail over time in soil, water, and sediments.
Collapse
|
6
|
Lin CY, Mohammad Ali BN, Tair R, Musta B, Abdullah MH, Cleophas F, Isidore F, Mohd Nadzir MS, Roselee MH, Yusoff I. Distance impacts toxic metals pollution in mining affected river sediments. ENVIRONMENTAL RESEARCH 2022; 214:113757. [PMID: 35753380 DOI: 10.1016/j.envres.2022.113757] [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: 05/04/2022] [Revised: 06/12/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
The study of metals mobility derived from mining activities in an ultramafic lithology is limited. This study investigates the effects of distance on potentially toxic metals such as Co, Cu, Fe, Mn, Ni, Pb, and Zn pollution, and the geochemical processes of fluvial system downstream of an ex-copper mine (Mamut River). The toxicity level of the river was evaluated using various sediment quality guidelines, ecotoxicological risks (ecological risk and risk index) and pollution indices. The geochemical behavior and stability of these toxic metals in the solid-phase samples were also examined. The results show that elevated concentrations of Ni, Cu, and Fe in the sediments can be linked to the adsorption and precipitation of metals from the aqueous-phase samples. We found that the metal scavenging rate as a function of distance is more evident in tropical environments than it was previously thought (10 km downstream). Such an inference could be explained by the greater amount of rainfall (pH 5.5-6.5) received in the tropics and higher weathering products that could react and form stable complexes. Geochemical analysis of the river sediment indicates that Ni, Cu, and Fe in the river sediment have increased 44-, 81-, and 90-fold compared to the background values, respectively. A significant decrease in the concentration of the potentially toxic metals was found at 5.5 km downstream. The scavenging rate of Fe is the highest (1485.82 μg g-1 km-1) followed by Cu (141.48 μg g-1 km-1), Ni (10.23 μg g-1 km-1), Pb (8.12 μg g-1 km-1) and Zn (5.01 μg g-1 km-1) in the tropical river system. In contrast, the concentration of Co and Mn in the river sediments doubled as the river flows approximately 5 km downstream due to the higher mineral solubility and weaker metal partition coefficient. This study also discusses the possibility of asbestos (mainly as chrysotile in the X-ray diffraction) as a potential hidden risk present within the ultramafic setting. This case study can be extrapolated to explain the dispersion of inorganic pollutants in an ultramafic environment in a global context.
Collapse
Affiliation(s)
- Chin Yik Lin
- Department of Geology, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Bibi Noorarlijannah Mohammad Ali
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Rohana Tair
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Baba Musta
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Mohd Harun Abdullah
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Fera Cleophas
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Feona Isidore
- Water Research Unit, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, 88400, Kota Kinabalu, Sabah, Malaysia
| | - Mohd Shahrul Mohd Nadzir
- Centre of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan, Malaysia; Research Centre for Tropical Climate Change System (IKLIM), Faculty of Science and Technology, Universiti Kebangsaan, Malaysia
| | - Muhammad Hatta Roselee
- Department of Geology, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Ismail Yusoff
- Department of Geology, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| |
Collapse
|
7
|
Zhang L, Xu Z, Sun Y, Gao Y, Zhu L. Coal Mining Activities Driving the Changes in Microbial Community and Hydrochemical Characteristics of Underground Mine Water. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13359. [PMID: 36293941 PMCID: PMC9603172 DOI: 10.3390/ijerph192013359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Coal mining can cause groundwater pollution, and microorganism may reflect/affect its hydrochemical characteristics, yet little is known about the microorganism's distribution characteristics and its influence on the formation and evolution of mine water quality in underground coal mines. Here, we investigated the hydrochemical characteristics and microbial communities of six typical zones in a typical North China coalfield. The results showed that hydrochemical compositions and microbial communities of the water samples displayed apparent zone-specific patterns. The microbial community diversity of the six zones followed the order of surface waters > coal roadways > water sumps ≈ rock roadways ≈ goafs > groundwater aquifers. The microbial communities corresponded to the redox sensitive indices' levels. Coal roadways and goafs were the critical zones of groundwater pollution prevention and control. During tunneling in the panel, pyrite was oxidized by sulfur-oxidizing bacteria leading to SO42- increase. With the closure of the panel and formation of the goaf, SO42- increased rapidly for a short period. However, with the time since goaf closure, sulfate-reducing bacteria (e.g., c_Thermodesulfovibrionia, Desulfobacterium_catecholicum, etc.) proportion increased significantly, leading to SO42- concentration's decrease by 42% over 12 years, indicating the long-term closed goafs had a certain self-purification ability. These findings would benefit mine water pollution prevention and control by district.
Collapse
Affiliation(s)
- Li Zhang
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
| | - Zhimin Xu
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
- Fundamental Research Laboratory for Mine Water Hazards Prevention and Controlling Technology, Xuzhou 221006, China
| | - Yajun Sun
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
- Fundamental Research Laboratory for Mine Water Hazards Prevention and Controlling Technology, Xuzhou 221006, China
| | - Yating Gao
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
| | - Lulu Zhu
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
| |
Collapse
|
8
|
Shi J, Du P, Luo H, Wu H, Zhang Y, Chen J, Wu M, Xu G, Gao H. Soil contamination with cadmium and potential risk around various mines in China during 2000-2020. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 310:114509. [PMID: 35219202 DOI: 10.1016/j.jenvman.2022.114509] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
Cadmium (Cd) pollution in mining areas is the most important challenge for soil environment management in China. Assessing the actual Cd pollution risk in various mining areas and identifying the core areas requiring supervision can provide a basis for government departments and industries to carry out detailed further investigations in key areas. In this study, we collated published data on metal mine circumjacent soil contaminated by Cd in China from 2002 to 2020 to conduct a comprehensive study on soil cadmium pollution and ecological and health risks in mining areas. The temporal and spatial variations of Cd concentrations and the pollution source were investigated. Results indicated that the Cd concentration in soil was strongly associated with the types of mining area. The Cd pollution in the circumjacent soil of lead-zinc and tungsten mines with high heavy metal pollution discharging coefficient was more serious than the soil around other mines. Identification of temporal and spatial variations for soil Cd in China indicated that the high Cd concentrations were found in the central, southern, and southwestern regions of China, and the distribution of mining activities in these regions are relatively concentrated. Meanwhile, a temporal turning point in the mean soil Cd concentration occurred in these regions in 2012, which indicated that the heavy metal control management policy implemented by the government was effective. The ecological risk of soil Cd pollution around mining areas was moderate to high. Health risk assessment showed that some regions adjacent mining areas had a high non-carcinogenic risk, notably, lead-zinc and tungsten mining areas were more serious. Supervision should focus on reducing ecological risks and protecting the safety of agricultural products rather than concentrating on health risks. The research results provide a reference for the priority management of contaminated soil in mining areas.
Collapse
Affiliation(s)
- Jing Shi
- Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Ping Du
- Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China.
| | - Huilong Luo
- Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China; College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Hao Wu
- Academy of Environmental Protection Sciences, Guangxi, China
| | - Yunhui Zhang
- Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China
| | - Juan Chen
- Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China
| | - Minghong Wu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Gang Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Hefeng Gao
- Academy of Environmental Protection Sciences, Guangxi, China
| |
Collapse
|
9
|
Ruhela M, Sharma K, Bhutiani R, Chandniha SK, Kumar V, Tyagi K, Ahamad F, Tyagi I. GIS-based impact assessment and spatial distribution of air and water pollutants in mining area. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:31486-31500. [PMID: 35001266 DOI: 10.1007/s11356-021-18009-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Mining is a significant part of the transforming economy, which is generally considered as essential as well as social evil at the same time. It is one of the potential contributors to air and water pollution and possesses long-term impact on their quality. Keeping in view the exponential mining activities, we have selected an iron mine area in Bailadila, Chhattisgarh, India, as a sampling site and investigated the impact of mining activities on the air as well as water quality by setting up seven air quality and thirty water quality monitoring stations. From the results obtained, it was observed that concentration of air pollutants such as SO2, NO2, PM2.5 and PM10 for the year 2015 lies in the range of 11.5-13.0 µg/m3, 11.5-13.0 µg/m3, 24.9-33.4 ppm and 61.6-74.2 ppm, respectively, while for the year 2018, it lies in the range of 10.3-11.7 µg/m3, 10.5-14.7 µg/m3, 18.3-50.8 ppm and 23.7-60.7 ppm, respectively. Furthermore, results obtained revealed that air pollutants such as SO2, NO2, PM2.5 and PM10 were within the permissible limits but they contributed towards the light air pollution (air pollution index: 25-50) at all the air monitoring stations. Moreover, PM10 was considered as criterion pollutant in the Bailadila, Chhattisgarh region. On the other hand, it was observed that groundwater quality was deteriorated in the subsequent years. Most of the water quality parameters were in the permissible limits except iron (Fe). Moreover, on the basis of water quality indexing, water quality was classified as "poor" in ~ 30% of the sites and "very poor" in ~ 34% sites. The water quality was "unhealthy for drinking" in 3% and 6% sites in the year 2015 and 2018, respectively.
Collapse
Affiliation(s)
- Mukesh Ruhela
- Department of Environmental Engineering (SITE), Swami Vivekanand Subharti University, Meerut, 250005, (UP), India
| | - Kaberi Sharma
- Department of Environmental Engineering (SITE), Swami Vivekanand Subharti University, Meerut, 250005, (UP), India
| | - Rakesh Bhutiani
- Limnology and Ecological Modelling Lab, Department of Zoology and Environmental Science, Gurukul Kangri (Deemed to be University), Haridwar, 249404, (UK), India
| | - Surendra Kumar Chandniha
- Department of Soil and Water Engineering, BRSM College of Agricultural Engineering and Technology & Research Station, IGKV, Mungeli, 495334, Chhattisgarh, India
| | - Vikas Kumar
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India
| | - Kaomud Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India
| | - Faheem Ahamad
- Keral Verma Subharti College of Sciences (KVSCOS), Swami Vivekanand Subharti University, Meerut, 250005, UP, India.
| | - Inderjeet Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, MoEF&CC), Kolkata, 700053, (WB), India.
| |
Collapse
|