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Zinc (Zn) is an essential micronutrient released into soils during rock weathering, and Zn isotope composition has been emerging as a powerful tracer involved in the Earth’s surface processes. To explore the soil development in dry tropical regions and evaluate the influence on the global Zn cycles, stable Zn isotope data were presented for the two pristine low-humic gleysol profiles from the Mun River Basin (MRB), northeast Thailand. The samples exhibit the δ66Zn (relative to JMC 3-0749L standard) from −0.69‰ to 0.32‰. Therein, the Fe nodule-containing soils exhibit a light shift of δ66Zn relative to parent red siltstones (Δ66Znnodule-containing soil–p of S1 = −0.60‰) and the other soils (Δ66ZnII-other zones = −0.66‰ – −0.50‰), indicating that the preferential retention of light Zn isotopes in residual soils is attributed to the adsorption of heavy Zn isotopes onto the surface of secondary Fe oxides. Due to the water insufficiency in the MRB, the redox conditions to control the oxide precipitation are driven by the seasonal alteration of groundwater levels. With the recession of groundwater, Fe oxides precipitate and adsorb heavy Zn isotopes. Besides, heavy Zn isotopes are also incorporated in clay fraction. On the contrary, the saturated water is likely to disrupt the interactions of Zn with Fe phases and clay minerals. In addition, low content of organic matter and Mn oxides and the absence of sulfides limitedly contribute to the light Zn pool in soils. Conclusively, the isotopic signature of Zn indicates that Fe oxide-rich soils are likely to control the heavier Zn isotope composition of dissolved load in rivers relative to continental rocks in dry tropical regions.
Bin Liang; Guilin Han; Man Liu; Xiaoqiang Li. Zn isotope fractionation during the development of low-humic gleysols from the Mun River Basin, northeast Thailand. CATENA 2021, 206, 105565 .
AMA StyleBin Liang, Guilin Han, Man Liu, Xiaoqiang Li. Zn isotope fractionation during the development of low-humic gleysols from the Mun River Basin, northeast Thailand. CATENA. 2021; 206 ():105565.
Chicago/Turabian StyleBin Liang; Guilin Han; Man Liu; Xiaoqiang Li. 2021. "Zn isotope fractionation during the development of low-humic gleysols from the Mun River Basin, northeast Thailand." CATENA 206, no. : 105565.
Trace metal pollution is one of the most concerning issues in Yunnan province, where red soil is the dominant soil. To investigate the sources of trace metals and assess their pollution level and potential ecological and health risk, trace metal concentrations were measured in two red soil profiles (S1 and S2) from Yunnan province. Results show that Cr, As, and Zn are the most abundant trace metals in both soil profiles. However, As and Cr might be pollutants because their concentrations are higher than the local background values and the average concentrations in soils from other countries such as China, Japan, the UK, and the USA. Based on the correlation matrix and principal component analysis, As and Cr in red soils were affected by mining activities. Based on the single factor index and Nemero pollution index, the enrichment of As and Cr in Yunnan province can lead to light pollution in red soils. The RI values of trace metals exhibit a low ecological risk, of which the RI values of As and Cd in S1 are higher than those of Cr, Cu, Ni, Pb, and Zn in both profiles, implying a higher soil pollution level in south Yunnan. Furthermore, the HI results indicate that As can cause non‐carcinogenic risk on human health and should be paid more attention to. This study is aimed to help developing the ecological management of red soils and providing scientific evidence for preventing the hazardous contamination of trace metals in soils. This article is protected by copyright. All rights reserved
Bin Liang; Guilin Han; Jie Zeng; Rui Qu; Man Liu; Jinke Liu. Source and Risk Assessment of Trace Metals in Red Soils from Yunnan Province, Southwest China. CLEAN – Soil, Air, Water 2021, 2000288 .
AMA StyleBin Liang, Guilin Han, Jie Zeng, Rui Qu, Man Liu, Jinke Liu. Source and Risk Assessment of Trace Metals in Red Soils from Yunnan Province, Southwest China. CLEAN – Soil, Air, Water. 2021; ():2000288.
Chicago/Turabian StyleBin Liang; Guilin Han; Jie Zeng; Rui Qu; Man Liu; Jinke Liu. 2021. "Source and Risk Assessment of Trace Metals in Red Soils from Yunnan Province, Southwest China." CLEAN – Soil, Air, Water , no. : 2000288.
The profile distributions of soil organic carbon (SOC), soil organic nitrogen (SON), soil pH and soil texture were rarely investigated in the Lancangjiang River Basin. This study aims to present the vertical distributions of these soil properties and provide some insights about how they interact with each other in the two typical soil profiles. A total of 56 soil samples were collected from two soil profiles (LCJ S-1, LCJ S-2) in the Lancangjiang River Basin to analyze the profile distributions of SOC and SON and to determine the effects of soil pH and soil texture. Generally, the contents of SOC and SON decreased with increasing soil depth and SOC contents were higher than SON contents (average SOC vs. SON content: 3.87 g kg−1 vs. 1.92 g kg−1 in LCJ S-1 and 5.19 g kg−1 vs. 0.96 g kg−1 in LCJ S-2). Soil pH ranged from 4.50 to 5.74 in the two soil profiles and generally increased with increasing soil depth. According to the percentages of clay, silt, and sand, most soil samples can be categorized as silty loam. Soil pH values were negatively correlated with C/N ratios (r = −0.66, p < 0.01) and SOC contents (r = −0.52, p < 0.01). Clay contents were positively correlated with C/N ratios (r = 0.43, p < 0.05) and SOC contents (r = 0.42, p < 0.01). The results indicate that soil pH and clay are essential factors influencing the SOC spatial distributions in the two soil profiles.
Wenxiang Zhou; Guilin Han; Man Liu; Jie Zeng; Bin Liang; Jinke Liu; Rui Qu. Determining the Distribution and Interaction of Soil Organic Carbon, Nitrogen, pH and Texture in Soil Profiles: A Case Study in the Lancangjiang River Basin, Southwest China. Forests 2020, 11, 532 .
AMA StyleWenxiang Zhou, Guilin Han, Man Liu, Jie Zeng, Bin Liang, Jinke Liu, Rui Qu. Determining the Distribution and Interaction of Soil Organic Carbon, Nitrogen, pH and Texture in Soil Profiles: A Case Study in the Lancangjiang River Basin, Southwest China. Forests. 2020; 11 (5):532.
Chicago/Turabian StyleWenxiang Zhou; Guilin Han; Man Liu; Jie Zeng; Bin Liang; Jinke Liu; Rui Qu. 2020. "Determining the Distribution and Interaction of Soil Organic Carbon, Nitrogen, pH and Texture in Soil Profiles: A Case Study in the Lancangjiang River Basin, Southwest China." Forests 11, no. 5: 532.
Dissolved heavy metals are not only the essential micronutrients, but also the toxic elements for human bodies. To investigate the heavy metal sources and assess the water quality of the Lancangjiang River, dissolved Cr, Ni, Cu, Zn, Mo, and Pb were detected in this study. The results show that dissolved Ni and Mo, Cr and Pb, and Cu and Zn were similarly distributed within the drainage basin. The correlation analysis exhibited that dissolved Ni and Mo had correlation with water parameter, and dissolved Cu was weakly correlated with Ni, indicating that they might be affected by natural processes. The principal component analysis explained 68.342% of the total variance for three principal components, of which dissolved Ni, Mo, and Cu were controlled by natural inputs; dissolved Cu and Cr were affected by anthropogenic activities; and dissolved Zn was influenced by agricultural activities in the downstream. The water quality showed that the water in upstream was worse than in midstream and downstream, and the whole drainage basin had water of excellent quality. Water within the drainage basin poses no risks to human bodies via daily diets and dermal routes. Dissolved Zn, Cu, and Mo occupied the major proportion of heavy metals transporting into the Mekong River. The agricultural inputs of dissolved Zn might pose potential risks to the Mekong River.
Bin Liang; Guilin Han; Jie Zeng; Rui Qu; Man Liu; Jinke Liu; Liu. Spatial Variation and Source of Dissolved Heavy Metals in the Lancangjiang River, Southwest China. International Journal of Environmental Research and Public Health 2020, 17, 732 .
AMA StyleBin Liang, Guilin Han, Jie Zeng, Rui Qu, Man Liu, Jinke Liu, Liu. Spatial Variation and Source of Dissolved Heavy Metals in the Lancangjiang River, Southwest China. International Journal of Environmental Research and Public Health. 2020; 17 (3):732.
Chicago/Turabian StyleBin Liang; Guilin Han; Jie Zeng; Rui Qu; Man Liu; Jinke Liu; Liu. 2020. "Spatial Variation and Source of Dissolved Heavy Metals in the Lancangjiang River, Southwest China." International Journal of Environmental Research and Public Health 17, no. 3: 732.
Climate changes and other human activities have substantially altered the hydrological cycle with respect to elevation. In this study, longitudinal patterns in the stable isotopic composition (δ2H and δ18O) of Lancang River water, originating from the Qinghai–Tibetan Plateau, are presented, and several controlling factors in the wet season are hypothesized. Lancang River water δ2H (−145.2‰ to −60.7‰) and δ18O (−18.51‰ to −8.49‰) were low but close to those of the Global Meteoric Water Line. In the upper reaches of the river, δ2H decreased longitudinally, potentially due to groundwater inputs and melting ground ice in the headwater zone and to an increasing proportion of glacier meltwater with decreasing elevation. In the middle reaches of the river, δ2H values increased slowly moving downstream, likely due to shifts in precipitation inputs, as evidenced by the isotopic composition of tributaries to the main stream. In the lower reaches of the river, the isotopic composition was relatively invariant, potentially related to the presence of large artificial reservoirs that increase the water resident time. The results reveal different hydrological patterns along an alpine river in central Asia associated with both natural and anthropogenic processes. Understanding the degree and type of human interference with the water cycle in this region could improve water management and water security.
Kunhua Yang; Guilin Han; Jie Zeng; Bin Liang; Rui Qu; Jinke Liu; Man Liu; Liu. Spatial Variation and Controlling Factors of H and O Isotopes in Lancang River Water, Southwest China. International Journal of Environmental Research and Public Health 2019, 16, 4932 .
AMA StyleKunhua Yang, Guilin Han, Jie Zeng, Bin Liang, Rui Qu, Jinke Liu, Man Liu, Liu. Spatial Variation and Controlling Factors of H and O Isotopes in Lancang River Water, Southwest China. International Journal of Environmental Research and Public Health. 2019; 16 (24):4932.
Chicago/Turabian StyleKunhua Yang; Guilin Han; Jie Zeng; Bin Liang; Rui Qu; Jinke Liu; Man Liu; Liu. 2019. "Spatial Variation and Controlling Factors of H and O Isotopes in Lancang River Water, Southwest China." International Journal of Environmental Research and Public Health 16, no. 24: 4932.
A total of 63 soil samples were collected from three soil profiles (yellow soil, red loam, red soil) from Jiulongjiang river catchment to investigate the distribution, controlling factors, and toxic risks of heavy metals, including Cr, Mn, Fe, Cu, Zn, Cd, Pb, and Ni. The results showed that Cr and Cd in soils were enriched. The relationships between heavy metals and soil properties were assessed by principal component analysis. The results indicated that soil organic matter (SOM) played a fundamental role in controlling Cd and Pb in yellow soil and red loam sites. The Cd was significantly correlated with Pb and Cu, and Cr, Zn, Ni, Fe displayed strong correlations with each other, however, no statistical correlation was found between Cd and Cr. The enrichment factor and geoaccumulation index analyses showed that the soils in the study area were contaminated by Cd. Potential ecological risk analyses indicated that Cd posed a considerable ecological risk in yellow soils, and posed a moderate ecological risk in red loams and red soils.
Qian Zhang; Guilin Han; Man Liu; Xiaoqiang Li; Lingqing Wang; Bin Liang; Han; Liu; Li; Wang. Distribution and Contamination Assessment of Soil Heavy Metals in the Jiulongjiang River Catchment, Southeast China. International Journal of Environmental Research and Public Health 2019, 16, 4674 .
AMA StyleQian Zhang, Guilin Han, Man Liu, Xiaoqiang Li, Lingqing Wang, Bin Liang, Han, Liu, Li, Wang. Distribution and Contamination Assessment of Soil Heavy Metals in the Jiulongjiang River Catchment, Southeast China. International Journal of Environmental Research and Public Health. 2019; 16 (23):4674.
Chicago/Turabian StyleQian Zhang; Guilin Han; Man Liu; Xiaoqiang Li; Lingqing Wang; Bin Liang; Han; Liu; Li; Wang. 2019. "Distribution and Contamination Assessment of Soil Heavy Metals in the Jiulongjiang River Catchment, Southeast China." International Journal of Environmental Research and Public Health 16, no. 23: 4674.
To examine the chemical composition, potential sources of solutes, and water quality of Lancangjiang River, the concentrations of major ions (Ca2+, Mg2+, Na+, K+, HCO3−, SO42−, Cl− and NO3−) in 45 river water samples collected in July and August 2019 were determined. Ca2+ and HCO3− are the predominant ions in river water. The extremely low K+ and NO3− concentrations and the sparse population suggest that the anthropogenic inputs are limited. The Pearson correlation coefficients and the elemental ratios Ca2+/Na+ versus Mg2+/Na+, Ca2+/Na versus HCO3−/Na+, [Ca2+ + Mg2+]/[HCO3−] versus [SO42−]/[HCO3−] reveal the mixing processes of different sources; the chemical composition of the river water is controlled by the mixture of carbonate weathering, evaporite weathering and silicate weathering inputs. To quantify the contributions of atmospheric input and rock dissolution, the forward method is employed in this study, which is based on the mass balance equation. The calculation results suggest the carbonate weathering inputs and gypsum dissolution make up the majority of the riverine cations, while silicate weathering and halite dissolution constitutes a relatively small proportion, the contributions of the atmospheric input are limited. The fast dissolution rate of evaporite and carbonate minerals and their lithologic distributions should be the key factor. To evaluate the water quality for drinking and irrigation purposes, the drinking water quality guidelines and the calculated parameters were employed, including sodium adsorption ratio (SAR), soluble sodium percentage (Na%,) and residual sodium carbonate (RSC). The assessments indicate that the river waters in the middle-lower reaches are generally suitable for irrigation and drinking purpose, and will not lead to health and soil problems, such as soil compaction and salinization. While in the upper reaches, the dissolution of carbonate and gypsum minerals transport abundant ions into river water and the river waters are not appropriate to use directly. This result highlights that the water quality status can also be affected by natural weathering processes in the area without anthropogenic inputs, where the long-time monitoring of water quality is also necessary.
Jinke Liu; Guilin Han; Man Liu; Jie Zeng; Bin Liang; Rui Qu. Distribution, Sources and Water Quality Evaluation of the Riverine Solutes: A Case Study in the Lancangjiang River Basin, Tibetan Plateau. International Journal of Environmental Research and Public Health 2019, 16, 4670 .
AMA StyleJinke Liu, Guilin Han, Man Liu, Jie Zeng, Bin Liang, Rui Qu. Distribution, Sources and Water Quality Evaluation of the Riverine Solutes: A Case Study in the Lancangjiang River Basin, Tibetan Plateau. International Journal of Environmental Research and Public Health. 2019; 16 (23):4670.
Chicago/Turabian StyleJinke Liu; Guilin Han; Man Liu; Jie Zeng; Bin Liang; Rui Qu. 2019. "Distribution, Sources and Water Quality Evaluation of the Riverine Solutes: A Case Study in the Lancangjiang River Basin, Tibetan Plateau." International Journal of Environmental Research and Public Health 16, no. 23: 4670.
River water samples between August 2017 (wet season) and March 2018 (dry season) from the Mun River Basin in northeast Thailand were collected and their dissolved heavy metals concentrations (Al, Mn, Fe, Cu, Zn, and Ba) were measured. Compared with international drinking water guidelines, Mn was the dominant pollutant in the dry season. The correlation analysis (CA) suggested that similar sources were shown in each element pair of Al-Fe, Mn-Zn, and Fe-Ba in both seasons. The principal component analysis (PCA) results showed that the dominant source of dissolved heavy metals was sedimentary inputs or colloid destabilization in the wet season, while anthropogenic inputs were the main sources in the dry season, such as agricultural runoff, industrial effluents, and domestic discharge. On the basis of water quality index (WQI), water at most sites in the wet and dry seasons can be categorized as excellent water, except for a few sites with substandard values. The river water posed no significant health risks according to the health risk assessment, but Mn, Fe, and Ba needed to be paid more attention due to the relatively high values. Al, Fe, and Ba were the main dissolved heavy metals flowing into the Mekong River, and Cu contributed to the background value in the Mekong river.
Bin Liang; Guilin Han; Man Liu; Xiaoqiang Li; Chao Song; Qian Zhang; Kunhua Yang. Spatial and Temporal Variation of Dissolved Heavy Metals in the Mun River, Northeast Thailand. Water 2019, 11, 380 .
AMA StyleBin Liang, Guilin Han, Man Liu, Xiaoqiang Li, Chao Song, Qian Zhang, Kunhua Yang. Spatial and Temporal Variation of Dissolved Heavy Metals in the Mun River, Northeast Thailand. Water. 2019; 11 (2):380.
Chicago/Turabian StyleBin Liang; Guilin Han; Man Liu; Xiaoqiang Li; Chao Song; Qian Zhang; Kunhua Yang. 2019. "Spatial and Temporal Variation of Dissolved Heavy Metals in the Mun River, Northeast Thailand." Water 11, no. 2: 380.
In this study, the concentration of eight dissolved heavy metals (Ti, Cr, Mn, Fe, Ni, Mo, Sb, and Ba) in 42 water samples from the Jiulongjiang River, southeast China, were determined by inductively coupled plasma mass spectrometry (ICP-MS). Multivariate statistical methods, including correlation analysis (CA) and factor and principal component analysis (FA/PCA), were analyzed to identify the sources of the elements. Water quality index (WQI) and health risk assessment, including hazard quotient (HQ) and hazard index (HI), were used to evaluate water quality and the impacts on human health. Our results were compared with the drinking water guidelines reported by China, the World Health Organization (WHO), and the United States Environmental Protection Agency (US EPA), revealing that Ti, Mn, and Sb were not within approved limits at some sites and might be the main pollutants in the drainage basin. Based on the spatial distributions, Ti, Mn, Fe, Ni, and Mo showed good similarity, indicating that they might come from similar sources along the river. The CA results also showed that Ti, Mn, Fe, Ni, and Mo had a high correlation coefficient. The FA/PCA results identified three principal components (PC) that accounted for 79.46% of the total variance. PC 1 suggested that a mixed lithogenic and urban land source contributed to Ti, Mn, Fe, Ni, and Mo; PC 2 showed that Cr, Ni, and Mo were influenced by the discharge of industrial effluents; Sb had a strong loading on PC 3, which was controlled by mining activities. The results of the WQI indicated that the water in the Jiulongjiang River was basically categorized as excellent water, but the water quality levels in site W5 and N4 were poorer due to urban land use. Hazard quotient and HI values showed that Sb was a potential threat to human health, indicating that preventive actions should be considered in regard to mining activities in the upper reaches of Beixi stream.
Bin Liang; Guilin Han; Man Liu; Kunhua Yang; Xiaoqiang Li; Jinke Liu. Distribution, Sources, and Water Quality Assessment of Dissolved Heavy Metals in the Jiulongjiang River Water, Southeast China. International Journal of Environmental Research and Public Health 2018, 15, 2752 .
AMA StyleBin Liang, Guilin Han, Man Liu, Kunhua Yang, Xiaoqiang Li, Jinke Liu. Distribution, Sources, and Water Quality Assessment of Dissolved Heavy Metals in the Jiulongjiang River Water, Southeast China. International Journal of Environmental Research and Public Health. 2018; 15 (12):2752.
Chicago/Turabian StyleBin Liang; Guilin Han; Man Liu; Kunhua Yang; Xiaoqiang Li; Jinke Liu. 2018. "Distribution, Sources, and Water Quality Assessment of Dissolved Heavy Metals in the Jiulongjiang River Water, Southeast China." International Journal of Environmental Research and Public Health 15, no. 12: 2752.