River morphology redistributes potentially toxic elements in acid mine drainage-impacted river sediments: Evidence, causes, and implications

Wei, Lezhang; Liu, Yu; Cai, Dafeng; Li, Fangqing; Luo, Dinggui; Li, Cheng; Xu, Guoliang; Xiao, Tangfu; Wu, Qihang; He, Huixian; Routh, Joyanto

doi:10.1016/j.catena.2022.106183

Cited by 9 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trapping effect of water reservoirs along rivers causes substantial fluctuations in contaminant releases downstream during dam operations or leakage (e.g., Refs. [ 57 , 58 , 59 , 60 ], representing an additional contribution to the intermittent release of Hg to the lower section of Tiber River. Moreover, the historical rainfall erosivity in the Tiber River basin drives hydrological events, with significant geomorphological effects [ 61 ].…”

Section: Discussionmentioning

confidence: 99%

Total Mercury Mass Load from the Paglia–Tiber River System: The Contribution to Mediterranean Sea Hg Budget

Fornasaro

Morelli

Costagliola

et al. 2022

Toxics

View full text Add to dashboard Cite

The Mediterranean Sea is characterized by a marked mercury (Hg) geochemical anomaly, arising in part from large Hg deposits. Mercury mass loads discharged from the Monte Amiata mining district (Central Italy) to the Mediterranean Sea through the Paglia–Tiber River system were estimated. Data from two seasons showed that up to 40 kg year−1 of Hg are drained to Tiber River and finally to the Mediterranean Sea. The mercury mass loads varied in different seasons, from 3 mg day−1 in the upper section of Paglia River in November to 42 g day−1 before the confluence with Tiber River in June. Along Tiber River, up to 15 ng L−1 of the total Hg found at a site after Rome showed that Hg can be discharged to the sea. The Alviano reservoir along Tiber River acts as a temporary trap for Hg-rich particulate, while dam operations may promote Hg release (up to 223 g day−1). The combination of hydrologic factors controlling Hg transport, the torrential regime in the upper catchment of Paglia River, the waterway steepness, together with Hg-contaminated legacy sediments in the Paglia River floodplain, make the Paglia–Tiber River system a long-lasting intermittent source of Hg to Tiber River and the Mediterranean Sea.

show abstract

Section: Discussionmentioning

confidence: 99%

Total Mercury Mass Load from the Paglia–Tiber River System: The Contribution to Mediterranean Sea Hg Budget

Fornasaro

Morelli

Costagliola

et al. 2022

Toxics

View full text Add to dashboard Cite

show abstract

“…A series of restoration plans have been implemented in the areas affected by Dabaoshan Mine to reduce the impact of the mining activities on downstream ecosystems, including the construction of a sewage treatment plant [18], mud impoundment [17], and adding lime to the rivers near the mine [19]. Construction of the sewage treatment plant and mud impoundment has effectively improved the water quality of the Hengshi River in the dry season.…”

Section: Suggestions For Prevention and Control Of Pte Contamination ...mentioning

confidence: 99%

“…However, the mud impoundment has gradually become full over time and AMD overflows during the rainy season, and the reactivation of PTEs in sediment has increased PTEs concentrations in the Hengshi River [30]. Although the addition of lime promotes the precipitation and adsorption of PTEs in river water, reducing their mobility [19], the increase in water pH may trigger the phase transformation of schwertmannite, releasing PTEs and increasing ecological risks. pH and SOM in the study area did not have a significant impact on the concentration and bioavailability of Cd in soil (Figures 7 and 8).…”

Section: Suggestions For Prevention and Control Of Pte Contamination ...mentioning

confidence: 99%

“…To avoid further contamination, mining activities were halted in 2016. In addition, in response to government policies, mining companies have conducted a series of restoration efforts for AMD treatment, including building mud impoundments to restrict the movement of waste and soil [17], constructing sewage treatment plants [18], and adding lime to the rivers near the mine [19].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Distribution, Migration, and Ecological Risk of Cd in Sediments and Soils Surrounding Sulfide Mines—A Case Study of the Dabaoshan Mine of Guangdong, China

Sheng

Hou

Yang

et al. 2023

Water

View full text Add to dashboard Cite

Acid mine drainage (AMD) resulting from metal sulfide mining activities can lead to contamination by potentially toxic elements (PTEs) primarily concentrated around the mining area and gradually spreading outward. However, ecological risks do not correspond directly to PTE concentrations, making it challenging to effectively manage the mining environment and accurately prevent potential ecological impacts. In this paper, we analyzed Cd levels in sediments, soils, and corresponding rice grains sampled from four villages near Dabaoshan Mine of Guangdong, China, in 2017. Our results reveal that Cd is the most prominent pollutant element, exhibiting significant enrichment and spatial heterogeneity in both soil and sediments and higher accumulation levels in rice grains compared to other PTEs. Cd concentrations in soil decrease from the tailings pond to the river terrace, with a slight increase after Taiping River joins and flows into the alluvial plain. However, the concentrations in sediments show the opposite trend. The bioconcentration factor (BCF) for Cd in agricultural soil from the river terrace is lower than that from the alluvial plain and the degree of exceeding the maximum permit level (MPL) of Cd in rice grains increases along the river. Mineral transformation and topography are important factors in controlling the geochemical behavior of PTEs. Remediation efforts alter the physicochemical properties of the river, resulting in the release of PTEs during schwertmannite transformation followed by their adsorption by clay minerals. Furthermore, the random forest (RF) analysis highlights that the bioavailability and potential ecological risk of Cd in soils are governed by the occurrence form of Cd in different topographies, mainly controlled by TFe2O3, Mn, and CaO in the river terrace and CaO, Al2O3/SiO2, and Mn in the alluvial plain. Therefore, considering the impact of topography on mineral compositions, physicochemical properties, and occurrence form of PTEs in soil and sediments is essential for assessing ecological risk in mining areas.

show abstract

“…However, there has been limited investigation into the bed sediments of drainage canals. Shi et al (2021) employed geochemical fingerprints to identify the sediment sources in drains within a small catchment in China; Hassaan et al (2022) assessed PTE contamination in water and sediments in the drainage network of Lake Mariot in Egypt; other studies have focused on characterizing mine stream sediments and the migration of PTEs along the drainage network (Friedland et al, 2021;Ghezzi et al, 2021;Prudêncio et al, 2015;Srarfi et al, 2019;Wei et al, 2022). In other cases, sediments from urban waterways have been studied to highlight the geochemical processes occurring upon exposure to the atmosphere during dredging operations (Cook & Parker, 2003).…”

Section: Introductionmentioning

confidence: 99%

Potentially Toxic Elements (PTEs) Distribution in Drainage Canal Sediments of a Low‐Lying Coastal Area

Giambastiani,

Greggio,

Carloni

et al. 2024

Earth and Space Science

View full text Add to dashboard Cite

This study examines the accumulation, distribution, and mobility of Potentially Toxic Elements (PTEs) in the sediments of a low‐lying coastal drainage network (Ravenna, Italy). The aim is to understand the geochemical processes occurring between drainage water and canal bed sediments and assess factors affecting and driving PTE distribution and enrichment in these environments. A geochemical database resulting from the analysis of 203 drainage sediment samples was analyzed using Principal Component Analysis and compared to undisturbed near‐surface sediment samples from the same depth and depositional environment. The results reveal PTEs exceeding national regulation limits. Distance from the sea, electrical conductivity of drainage water, and fertilizer use were identified as the main driving factors. The primary mechanisms for PTE precipitation (As, Co, Mo) and subsequent enrichment in the sediments is attributed to the absorption on Fe‐ and Mn‐oxyhydroxides (HFO and HMO), particularly in high salinity areas near the coast. While Cu, Zn, Pb, Cr, and V also have affinity for HFO and HMO, their adsorption efficiency decreases due to the competition with salt‐derived cations during ongoing salinization processes. Anthropogenic sources, including agriculture, hunting activities, traffic dust, and railways, contribute to the local abundance of other elements (Cr, Ni, Cu, Zn, Pb, and Sn). This paper's significant progress lies in assessing the concurrent interactions of chemical and physical processes that drive PTE distribution and accumulation in reclaimed low‐lying coastal plains. The findings are significant for assessing PTE accumulation risks and sediment toxicity in coastal areas affected by water salinization, drainage, and subsidence, providing valuable information to water management institutions globally.

show abstract

River morphology redistributes potentially toxic elements in acid mine drainage-impacted river sediments: Evidence, causes, and implications

Cited by 9 publications

References 46 publications

Total Mercury Mass Load from the Paglia–Tiber River System: The Contribution to Mediterranean Sea Hg Budget

Total Mercury Mass Load from the Paglia–Tiber River System: The Contribution to Mediterranean Sea Hg Budget

Spatial Distribution, Migration, and Ecological Risk of Cd in Sediments and Soils Surrounding Sulfide Mines—A Case Study of the Dabaoshan Mine of Guangdong, China

Potentially Toxic Elements (PTEs) Distribution in Drainage Canal Sediments of a Low‐Lying Coastal Area

Contact Info

Product

Resources

About