Desorption of copper and cadmium from soils enhanced by organic acids

Yuan, Songhu; Xi, Zhimin; Jiang, Yi; Wan, Jiguang; Wu, Chan; Zhao, Zheng; Lü, Xiaohua

doi:10.1016/j.chemosphere.2007.01.046

Cited by 137 publications

(81 citation statements)

References 34 publications

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“…2, S increased with the increase of the C e . The results obtained from this test showed similar adsorption behavior to that reported by Yuan et al [14] on kaolin clay. …”

Section: Adsorption Of Coppersupporting

confidence: 79%

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Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Hassan¹,

Mohamedelhassan²

2014

JCEA

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This study is conducted to investigate sorption and desorption characteristics of a clay soil of Medicine Hat, Alberta, Canada. Also, the soil fertility after the desorption tests was investigated. Sorption of copper by a clay soil was examined using copper solutions with concentrations from 1,000 mg/L to 5 mg/L. The influence of copper concentration and pH on desorption was also studied. Electrokinetic remediation was carried on soil specimen spiked with copper. Soil fertility parameters for specimens acidized by electrolysis reactions and nitric, hydrochloric, and citric acids were compared. From the results, the adsorption of copper by the soil is proportional to the concentration in the solution and Langmuir isotherm represents the data. Desorption of copper was found to increase with the increase of initial copper in the soil and the decrease of pH. At pH of 5.75 ± 0.25, the maximum desorption was 16.5% of initial copper and the minimum was 4.2%. In tests with similar copper concentrations, the maximum desorption was 76.6% in the test with pH of 2. Electrokinetics reduced the pH of soil near the anode to 2.1 and removed 86% of copper. Soil specimen acidized by electrolysis reactions preserved favourable fertility parameters compared with specimens acidized by acids.

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“…2, S increased with the increase of the C e . The results obtained from this test showed similar adsorption behavior to that reported by Yuan et al [14] on kaolin clay. …”

Section: Adsorption Of Coppersupporting

confidence: 79%

“…The pH is known to be a dominant factor on the adsorption/desorption behavior of heavy metals by soils [14]. In electrokinetic remediation, electrolysis reactions change the soil pH and, thereby, influence the adsorption and desorption characteristics.…”

mentioning

confidence: 99%

Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Hassan¹,

Mohamedelhassan²

2014

JCEA

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“…In the pH range of 7-9, the release of heavy metals was usually diffcult to occur, there were several reasons to explain this phenomenon: (1) most of the metals existed in the form of insoluble precipitation under neutral pH; (2) the zeta potential of the sediment became more negative under higher pH, thus the specifi c adsorption stem from the existence of surface charge enhanced accordingly, which inhibited the metal release (Yuan et al 2007); (3) there was less competition of protons for adsorbing sites in the sediment at higher pH (Yang et al 2006).…”

Section: Characterization Of Sedimentmentioning

confidence: 99%

Effect of overlying water pH, dissolved oxygen and temperature on heavy metal release from river sediments under laboratory conditions

Huang¹,

Zhang²,

Xu³

et al. 2017

Archives of Environmental Protection

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Abstract:The heavy metal release experiments were conducted in the laboratory to examine the effects of 3 factors -pH, dissolved oxygen (DO), and temperature on the metal release from sediments taken from the Huangpu River. The metal concentrations in the dry sediments ranged from 0.030 to 0.296 mg g -1 for Cr, 0.021 to 0.097 mg g -1 for Ni, 0.014 to 0.219 mg g -1 for Cu, 0.035 mg to 0.521 mg g -1 for Zn, 0.0002 to 0.001 mg g -1 for Cd and 0.023 to 0.089 mg g -1 for Pb. Most of the metals found in the sediments were in the form of residual fraction, the exchangeable fraction consisted of only a small portion of total metals. The average dissolved metal concentrations in the overlying water during the 13-day period under different conditions were ranging from 0.82 to 1.93 μg L -1 for Cr, 1.08 to 4.19 μg L -1 for Ni, 40.79 to 82.28 μg L -1 for Cu, 20.30 to 29.96 μg L -1 for Zn, 1.57 to 4.07 μg L -1 for Cd, and 22.26 to 75.50 μg L -1 for Pb, respectively. Statistical interpretation of the data indicated that pH (7, 8, 9), dissolved oxygen DO (1.0 and 5.0 mg L -1 ) and temperature (4, 16, 25°C) had no signifi cant effects on the heavy metal release under the studied conditions. Cu and Pb had the highest release fl ux, while Cd, Pb and Cu had higher mobility. The main factors controlling the metals release might be the inherent characters of metals and sediments.Unauthenticated Download Date | 5/13/18 9:52 AM Effect of overlying water pH, dissolved oxygen and temperature on heavy metal release from river sediments... 29

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“…Zhou et al [16] found that glyphosate can decreased the adsorption of Cd in soils and increase the movement of Cd in the soil-water system. Yuan et al [17] recorded that organic acids could promote Cd desorption from soils. Li et al [18] also addressed the idea that the application of EDTA combined with a low dosage of ethyl lactate significantly enhanced the efficiency of willow in removing Cd (promoting bioavailability) from soil.…”

Section: Effects Of Butachlor On CD Availability In Soilmentioning

confidence: 99%

Effects of Hybrid Giant Napier Biochar on Cadmium Migration in a Cabbage-Soil System Contaminated with Cadmium and Butachlor

He¹,

Pan²,

Yu³

et al. 2017

Pol. J. Environ. Stud.

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Butachlor is an important chloroacetanilide herbicide applied in agriculture all over the world. In China, butachlor is now one of the three most widely utilized herbicides, with a yield of 1×10 4 t per year [1]. The application of butachlor in large quantities IES may cause the contamination of underground water, surfacewater, and paddy soil in China, leading to disruption of the environment and ecosystems [2]. At the same time, anthropogenic activities result in increasing pollution of heavy metals that cannot be degraded and hence accumulate in the environment. Heavy metals threaten soil quality, plant survival, and human health, and their mobility are of global concern [3]. Cadmium (Cd) is a non-essential metal element that may cause damage even at very low levels. Cd in croplands can result in enhanced dietary exposure through Pol. J. Environ. Stud. Vol. 26, No. 2 (2017), 619-625 AbstractWe investigated the effects of high-productivity plant hybrid giant Napier (HGN)-derived biochars prepared at different pyrolysis temperatures on Cd migration in a soil-cabbage system contaminated with Cd and butachlor. The results showed that with the enhancement amount of biochar applied, soil pH and electrical conductivity (EC) increased, whereas the available Cd content dropped significantly (P<0.05). The maximum decreasing value (66.08%) of the available Cd content was observed, while with 5% biochar prepared at 400ºC. Further application of this biochar caused a significant biomass increase and a Cd content decrease of cabbage (P<0.05). Notably, the cabbage biomass even increased to 573.58%. The application inhibited Cd migrations from the soil to the underground part and, successively, the overground part of the cabbage, leading to reduced bioaccumulation of Cd. With 5% biochar prepared at 400ºC, the maximum decrease of the Cd content reached up to 90% in the aboveground part and 70% in the underground part of cabbage, respectively. Hence, the investigation demonstrates that high-productivity HGN-derived biochar can be a good candidate for immobilizing Cd and reducing its bioaccumulation.

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Desorption of copper and cadmium from soils enhanced by organic acids

Cited by 137 publications

References 34 publications

Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Sorption, Desorption, Remediation and Fertility Characteristics of a Clay Soil

Effect of overlying water pH, dissolved oxygen and temperature on heavy metal release from river sediments under laboratory conditions

Effects of Hybrid Giant Napier Biochar on Cadmium Migration in a Cabbage-Soil System Contaminated with Cadmium and Butachlor

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