Evaluation of heavy metals stability and phosphate mobility in the remediation of sediment by calcium nitrate

Zhou, Jizhi; Zhang, Mingqi; Ji, Meiting; Wang, Zhenghua; Hou, Hao; Zhang, Jia; Huang, Xin; Hursthouse, Andrew; Qian, Guangren

doi:10.1002/wer.1297

Cited by 19 publications

(4 citation statements)

References 45 publications

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“…We could not determine the acceptable margin of error, however, we can refer to the overview of the water quality model that currently considers simulation results acceptable within a 30% margin of error from the water quality model (Li et al 2011;Wu et al 2019;Chen et al 2020). Though we can identify various factors (Such as pH, dissolved oxygen (Atkinson et al 2007), temperature (Huang et al 2017), the inherent characteristics of the sediment (Xu et al 2015), high salinity and high nitrogen levels (Hong et al 2011), the content of P in the overlying water (Chen et al 2017), sediment redox potential (Martin-Torre et al 2015), sulfide and calcium content (Zhou et al 2020)) that affect the heavy metal release from sediments, many issues are yet to be studied: the extent that each factor (Especially hydrodynamic conditions and pH) influences on heavy metal release from sediments, the release characteristics of dissolved and suspended heavy metals in sediments under different hydrodynamic conditions, the release time to reach a relative equilibrium, the total amount of heavy metals released from sediments under different environmental conditions. Here we analyzed the particle size of sediments in the Le'an River particularly (0-250 μm), since particle size also has a certain impact on nutrient release from sediments (Zhu et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, high salinity and high nitrogen levels can enhance the bioavailability of heavy metals in sediments (Hong et al 2011), or the activity of heavy metals in sediments is relatively high in anoxic environments (Acosta et al 2011). Heavy metal release is also affected by sediment redox potential, sulfide and calcium content (Martin-Torre et al 2015;Zhou et al 2020), or the inherent characteristics of the sediment (Xu et al 2015;Huang et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Release flux of heavy metals from river sediments at different flow rates

Cai

Zhang

et al. 2021

Water Supply

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This paper simulates sediment motion under different hydrodynamic conditions, aiming to investigate the release flux of heavy metals in river sediments. During the lab experiments, carried out in a circular rectangular flume device, water velocity in the flume was altered by controlling the gate switch, and the flow rate was controlled from 0 to 1 m/s. Sediment from the Le'an River and chlorine-removed tap water were used as experimental sediment and water, respectively. Through analyses of Cu, Zn, Cd, and Pb concentration in water at different flow rates, the relationship between the release flux (y) of Cu, Zn, Cd, and Pb and the flow rate (x) was established with a fitting error of less than 15%. In order to judge the reliability of the conclusions, experimental results were verified outdoors. The results showed when the sediment particle size is between 0 and 250 μm, within 1 hour, a quadratic polynomial correlation between the release flux of Cu, Cd, and Pb from river sediments and water velocity when the water pH is 5–9 and the flow rate is 0–65 cm/s; when the water pH is 5–9, the flow rate is 0–35 cm/s, the release flux of Zn from river sediments was shown to have a quadratic polynomial relationship with water velocity. The error between the calculated and measured values of heavy metals released from sediment in the Le'an River were within 5–30%. Our results can provide a theoretical reference for the control and treatment of heavy metal pollution in rivers and further improve corresponding water quality models.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Release flux of heavy metals from river sediments at different flow rates

Cai

Zhang

et al. 2021

Water Supply

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“…Therefore, riverbed sediments have a nonnegligible role in the migration and transformation process of secondary pollutants in rivers (Qin and Tao, 2022). Factors such as water pH, dissolved oxygen, temperature, high salinity, high nitrogen levels, P content in overlying water, sediment redox potential, sul des, and calcium content in uence the release of heavy metals from sediments (Martín-Torre et al, 2015; Xu et al, 2017;Zhou et al, 2020). The results of relevant studies in China and abroad indicate that the potential ecological hazards and transportability of heavy metals can be better evaluated by analysing their speciation in sediments (Liu et al, 2021;.…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental factors on changes in the speciation of Pb and Cr in sediments of Wuliangsuhai Lake, during the ice-covered period

Zhao,

Shi

et al. 2024

Environ Geochem Health

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Ecological pollution caused by heavy metals released by sediments is a worldwide concern. However, the effect of changes in sediment speciation on their release of heavy metals has not been adequately reported. This study analysed changes in the sediment speciation of Pb and Cr before and after a release experiment by varying the temperature, pH, and salinity of the water column. The results show that the release of Pb and Cr from sediments increases with increasing water temperature, mainly due to the conversion of the residual fraction of Pb to the Fe-Mn oxide fraction and Cr converting more residual fraction to the organic matter and sul de fraction. The release of sediment Pb and Cr decreased with increasing pH, with Pb converting more acid extractable fraction to the residual fraction and Cr converting more organic matter and sul de fraction to the residual fraction. In contrast, the release of Pb and Cr increased and then decreased with increasing salinity, with the acid extractable and residual fractions of Pb interconverting, and the organic matter and sul de fraction and the residual fraction of Cr showing higher interconversion. For Pb, the acid extractable fraction was more susceptible to conversion to the residual fraction by environmental in uences, whereas for Cr, the organic matter and sul de fraction was susceptible to conversion to the residual fraction. This study highlights the in uence of environmental factors on the sediment speciation of heavy metals, which can help reveal the transport and transformation of heavy metals in cold and arid lake sediments.

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“…Geophysical exploration has always played an important role in the exploitation of geothermal resources. Because of the uniformly distributed underground hot water channels, the temperature [4][5][6][7], density [8][9][10][11][12], electrical conductivity [13][14][15][16][17], wave velocity [18,19], magnetic susceptibility [20][21][22] and other physical parameters of underground Water 2023, 15, 3418 2 of 13 media, these differences in physical properties provide a physical basis for geophysical exploration of geothermal energy. The conductivity of underground media is one of the important parameters to characterize the geothermal environment, and it is also the method basis for the application of the electromagnetic method in geothermal exploration, and the electromagnetic method has also obtained many achievements in the exploration of geothermal resources [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Geothermal Water Exploration of the Maoyanhe Hot Spring Scenic Spot in Zhangjiajie Using the Natural Electric Field Frequency Selection Method

Lu,

Ding,

Yang

et al. 2023

Water

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Natural electric field frequency selection method was proposed by Chinese scholars in the 1980s on the basis of imitating the field observation method of the magnetotelluric method (MT). It can only measure the magnetotelluric field components of one or several frequencies on the surface to determine the existence of underground geological bodies. This method has played an important role in shallow groundwater exploration. This paper mainly discusses the application of frequency selection method in the exploration of underground hot water in the Maoyanhe Scenic spot, Zhangjiajie City, Hunan Province, in order to illustrate the effectiveness of the frequency selection method in water exploration. According to the situation of the construction site, nearly 20 geophysical prospecting survey lines of varying lengths were laid flexibly within the red line of the Maoyan River Scenic Spot. Firstly, three-frequency (170 Hz, 67 Hz and 25 Hz) measurements were carried out on each survey line to preliminarily determine the possible horizontal location of underground hot water. Secondly, in the vicinity of the low potential anomaly of the three-frequency curve, the fine measurement by using multi-frequency bipolar profile method was further carried out. The specific distribution of underground hot water was determined based on the principle of frequency domain sounding and the static effect characteristics of the electromagnetic method so as to provide a scientific basis for the drilling layout. Finally, the reliability of the frequency selection method is verified by two verification boreholes. The results indicate that the frequency selection method is one of the effective geophysical exploration methods in groundwater exploration.

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Evaluation of heavy metals stability and phosphate mobility in the remediation of sediment by calcium nitrate

Abstract: Evaluation of heavy metals stability and phosphate mobility in the remediation of sediment by calcium nitrate.

Cited by 19 publications

References 45 publications

Release flux of heavy metals from river sediments at different flow rates

Release flux of heavy metals from river sediments at different flow rates

Influence of environmental factors on changes in the speciation of Pb and Cr in sediments of Wuliangsuhai Lake, during the ice-covered period

Geothermal Water Exploration of the Maoyanhe Hot Spring Scenic Spot in Zhangjiajie Using the Natural Electric Field Frequency Selection Method

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