Heavy Rainfall Events Following the Dry Season Elevate Metal Contamination in Mining-Impacted Rivers: A Case Study of Wenyu River, Qinling, China

Chen, Dong; Lin, Yuanzhang

doi:10.1007/s00244-021-00870-y

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Runoff resulting from terrain and rainfall transport trace elements into rivers, which is most serious during the rainy season. Soil and trace elements in sediment loss exhibit a similar spatial trend [ 14 , 15 , 16 ]. Plants are poisoned by trace elements, leading to reduced vegetation coverage and increased soil erosion.…”

Section: Introductionmentioning

confidence: 99%

Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment

Deng,

Li,

et al. 2024

Toxics

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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.

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Section: Introductionmentioning

confidence: 99%

Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment

Deng,

Li,

et al. 2024

Toxics

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“…In aquatic ecosystems, it can be observed as a severe disturbance or even destruction of the water quality and the functions, habitats, biological communities, and species composition of these ecosystems. Studies have shown that AMD could signi cantly decrease the water quality [8,9] and the activity of the invertebrates, aquatic plants, or zoobenthos [10]. Additionally, it may also a ect the degradation of plant litter in the streams [11].…”

Section: Introductionmentioning

confidence: 99%

The Combined Application of Surface Floating Wetlands and Bottom Anaerobic to Remediate AMD-Contaminated Lakes

Wang³

et al. 2022

Journal of Chemistry

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Acid mine drainage (AMD) causes environmental pollution that affects many countries with historic or current mining industries. The eco-remediation system (RW) which combined surface floating wetlands and bottom anaerobic sediments (SFW-BAS) was selected for AMD-contaminated lakes (AMDW). Meanwhile, AMDW and nature aquatic ecosystems (NW) were set as the control groups, respectively. The parameters, including pH, Eh, Fe, Mn, SO42−, and the degradation rate of the native dominant plant litter were investigated to assess the effects of remediation. The results showed that the average of pH, Eh, and EC, was 2.73, 484.08 mv, and 2395.33 μs·cm−1, respectively. The average content of SO42−, Fe, Mn, Cu, Zn, and Pb was 2190 mg·L−1, 40.2 mg·L−1, 4.6 mg·L−1, 249.2 μg·L−1, 1563 μg·L−1, and 112.9 μg·L−1, respectively. The degradation rate of plant litters in AMDW ranged from 14.5% to 22.6%. However, RW ultimately improved the water quality and the degradation of litters. RW has a good effect on buffering the acidity, ranging from 3.96 to 7.41. The pH of RW (6.14) is close to that of NW (7.41). The average content of SO42−, Fe, Mn, Cu, Zn, and Pb was 2071 mg·L−1, 3.4 mg·L−1, 2.4 mg·L−1, 85.3 μg·L−1, 607.4 μg·L−1, and 47.8 μg·L−1, respectively, which showed good pollutant removal performance. The degradation rate of plant litters in RW ranged from 27.8% to 32.6%. Therefore, RW can be used to remediate AMDW.

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Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site

Li,

Luo,

2024

J. Earth Sci.

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Heavy Rainfall Events Following the Dry Season Elevate Metal Contamination in Mining-Impacted Rivers: A Case Study of Wenyu River, Qinling, China

Cited by 7 publications

References 25 publications

Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment

Wide Riparian Zones Inhibited Trace Element Loss in Mining Wastelands by Reducing Surface Runoff and Trace Elements in Sediment

The Combined Application of Surface Floating Wetlands and Bottom Anaerobic to Remediate AMD-Contaminated Lakes

Characteristics and Genesis of Acid Drainage Contamination from a Rock Tunneling Project Site

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