Cadmium isotopes as tracers in environmental studies: A review

Zhong, Qiaohui; Zhou, Yuchen; Tsang, Daniel C.W.; Liu, Juan; Yang, Xiao; Yin, Meiling; Wu, Shijun; Wang, Jin; Xiao, Tangfu; Zhang, Zhaofeng

doi:10.1016/j.scitotenv.2020.139585

Cited by 75 publications

(27 citation statements)

References 65 publications

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“…Feed solutions comprise Cd 2+ and/or Zn 2+ ions were fed to the column by a peristaltic pump through different flow rates (2 and 3 mL/min) at room temperature. The Cd 2+ and Zn 2+ ions solutions were collected from (2) (1) the column end in the fraction collector. The ions concentration was specified by the Atomic-Absorption-Spectrophotometer.…”

Section: Fixed-bed Column Investigationmentioning

confidence: 99%

“…Cadmium has numerous radioisotopes, including 109 Cd (half-life ≈ 462.9 days) which is utilized in nuclear reactors as a shield and control rod for neutron absorption [1]. It possesses also an important role in some industries as alloys, batteries, aerospace coatings, stabilizers, and plating [2]. In environmental systems, it mostly presents as Cd(I) and Cd(II), but the latter exists in higher concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…In environmental systems, it mostly presents as Cd(I) and Cd(II), but the latter exists in higher concentrations. Cadmium is a markedly toxic metal and has a very low biocidal dose for mammals, which could damage the lungs, liver, and kidney [2]. Therefore, the capture of cadmium from the water source is substantial to the environment clean from pollution and human health [3].…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of zirconium silicate composite for removal of cadmium and zinc ions

Attia

Sami

Hassan

et al. 2021

Preprint

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The purification of wastewater is preferred using the adsorption technique by the column due to the high efficiency of the process. The column studies are achieved to predict the removal of pollutants and clarify the adsorption capability of these pollutants in the treatment process of wastewater. Zinc and cadmium ions are presented in both radioactive and industrial wastes. Consequently, this work focused on the removal of zinc and cadmium ions from polluted wastewater using a fixed-bed column. Zirconia–silicate composite (ZrO2–SiO2) was produced using the sol-gel technique and analyzed for this purpose. Various parameters as bed depth (2, 3, and 5 cm), flow rate (2 and 3 mL/min), and initial ions concentrations (50–200 mg/L) were investigated. The column performance was computed to be 80.3 and 79.3% for Zn2+ and Cd2+, respectively, at the optimum conditions (3 cm bed depth, 2 mL/min flow rate, and 100 mg/L ions concentration). Thomas, Adams–Bohart, and Yoon–Nelson models were performed to estimate the breakthrough curves and compute the column model parameters which are valuable for process design. Thomas model presented the highest R2 values (0.84–0.97) and offered the most accurate estimation of the adsorption process.

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Section: Fixed-bed Column Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of zirconium silicate composite for removal of cadmium and zinc ions

Attia

Sami

Hassan

et al. 2021

Preprint

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“…Isotope geochemistry has widely demonstrated its added value for tracking sources of metals, e.g., Cd, Cr, Cu, Pb, U and Zn, in the environment (e.g., [92] and references therein). This is based on the fact that metal isotope ratios/compositions usually show specific signatures representative of the reservoir they are originating from [93,94]. However, processes such as oxidation/reduction, sorption, dissolution/precipitation reactions or biological assimilation can modify some of these isotope distributions and induce isotope fractionation (i.e., modify isotope ratios/compositions).…”

Section: Origin Of Tmm In Stream Watersmentioning

confidence: 99%

Determining the Regional Geochemical Background for Dissolved Trace Metals and Metalloids in Stream Waters: Protocol, Results and Limitations—The Upper Loire River Basin (France)

Gassama

Curie

Vanhooydonck

et al. 2021

Water

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To avoid the improper disqualification of a watershed for which the water–rock interaction (WRI) may produce trace element concentrations exceeding established guidelines, it is of the utmost importance to properly establish natural geochemical backgrounds. Using the example of the crystalline Upper Loire River Basin, we are proposing a methodology based on the selection and chemical characterization of water and sediment samples from 10 monolithologic watersheds supposedly lowly impacted by anthropogenic inputs. We collected water samples from each watershed’s spring down to its outlet and measured dissolved major, minor and selected trace elements (Al, As, Ba, Cd, Co, Cr, Cs, Cu, La, Ni, Pb, U, V and Zn) at low- and high-water stages. Results show that the chemical signature of the stream waters is controlled by mineral weatherability rather than by the available rock stock. As a result, the variability in dissolved metal concentrations between the principal lithologies is similar to that observed within each of them. While some elements mostly result from WRI, others clearly identify high inputs from topsoil leaching. Comparison with published data evidences the need to subdivide studied watersheds into distinct sectors, according to the distance from the spring, in order to define reliable natural backgrounds.

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“…Since urbanization and industrialization have spread wildly in China in recent decades, the concentration of toxic heavy metals (Cd and Pb) in soil has increased in various regions [1][2][3]. Heavy metals are usually added to soil through mining and smelting activities [4][5][6], uncontrolled e-waste processing operations, industrial wastewater, and industrials solids [7,8]. Vegetables, with rich vitamins, mineral elements, dietary fiber, and other nutrients, are an indispensable, non-staple, daily food [4,9,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of a Passivator Synthesized by Wastes of Iron Tailings and Biomass on the Leachability of Cd/Pb and Safety of Pak Choi (Brassica chinensis L.) in Contaminated Soil

Yang

2021

Processes

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Cadmium (Cd) and lead (Pb) carry a high heavy-metal-toxic risk for both animals and plants in soil. In this study, iron-based biochar (T-BC) was prepared by co-pyrolysis using wastes of iron tailings and biomass with urea as the functioning agents. Field-emission scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and toxicity-characteristic leaching procedure (TCLP) methods were employed to analyze the physicochemical characteristics of T-BC. Additionally, a pot trial was conducted to examine the effects of T-BC on the physiological characteristics of pak choi (Brassica campestris L.), the availability of heavy metals, and enzyme activities in the soils. The results show that toxic metals have been volatilized by the roasting process and immobilized within T-BC via the formation of stable metal-compounds during the co-pyrolysis process, which satisfies the requirements of a soil passivator. Incubation experiments showed that the DTPA-extractable Cd and Pb in contaminated soils decreased with an increasing amendment rate. Moreover, in the pot experiments, by adding 1% (w/w) T-BC into soils, the soils benefited from its large adsorption, complex precipitation, and immobilization capacity. Approximately 36% Cd and 29% Pb concentrations of edible parts in pak choi were reduced. The amendment proved promising for the stabilization of Cd and Pb in contaminated soils, while providing a strategy for solving the residual waste of tailings and biomass.

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Cadmium isotopes as tracers in environmental studies: A review

Cited by 75 publications

References 65 publications

Performance evaluation of zirconium silicate composite for removal of cadmium and zinc ions

Performance evaluation of zirconium silicate composite for removal of cadmium and zinc ions

Determining the Regional Geochemical Background for Dissolved Trace Metals and Metalloids in Stream Waters: Protocol, Results and Limitations—The Upper Loire River Basin (France)

Effect of a Passivator Synthesized by Wastes of Iron Tailings and Biomass on the Leachability of Cd/Pb and Safety of Pak Choi (Brassica chinensis L.) in Contaminated Soil

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