Effect of Cr(VI) anions on adsorption and desorption behavior of Cu(II) in the colloidal systems of two authentic variable charge soils

Xu, Runsheng; Xiao, Shuangcheng; Zhao, Aiwu; Ji, Guoliang

doi:10.1016/j.jcis.2004.09.053

Cited by 36 publications

(8 citation statements)

References 23 publications

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“…Electrostatic adsorption, specific adsorption and surface precipitation were main mechanisms for the adsorption of heavy metals by soils89. Neutral salt such as KNO 3 was used to extract the heavy metals adsorbed by soils electrostatically through cation exchange reaction10. Neutral salt extractants were also used to estimate the phytoavailable trace metals in soils11.…”

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confidence: 99%

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Relative abundance of chemical forms of Cu(II) and Cd(II) on soybean roots as influenced by pH, cations and organic acids

Zhou

Liu

et al. 2016

Sci Rep

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Little information is available on chemical forms of heavy metals on integrate plant roots. KNO3 (1 M), 0.05M EDTA at pH6 and 0.01 M HCl were used sequentially to extract the exchangeable, complexed and precipitated forms of Cu(II) and Cd(II) from soybean roots and then to investigate chemical form distribution of Cu(II) and Cd(II) on soybean roots. Cu(II) and Cd(II) adsorbed on soybean roots were mainly exchangeable form, followed by complexed form, while their precipitated forms were very low under acidic conditions. Soybean roots had a higher adsorption affinity to Cu(II) than Cd(II), leading to higher toxic of Cu(II) than Cd(II). An increase in solution pH increased negative charge on soybean and thus increased exchangeable Cu(II) and Cd(II) on the roots. Ca2+, Mg2+ and NH4+ reduced exchangeable Cu(II) and Cd(II) levels on soybean roots and these cations showed greater effects on Cd(II) than Cu(II) due to greater adsorption affinity of the roots to Cu(II) than Cd(II). L-malic and citric acids decreased exchangeable and complexed Cu(II) on soybean roots. In conclusion, Cu(II) and Cd(II) mainly existed as exchangeable and complexed forms on soybean roots. Ca2+ and Mg2+ cations and citric and L-malic acids can potentially alleviate Cu(II) and Cd(II) toxicity to plants.

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confidence: 99%

“…Neutral salts were previously used to extract exchangeable heavy metals adsorbed on soils and exchangeable Al from plant roots1033. EDTA was used to extract heavy metal cations adsorbed specifically by soil organic matter and crop straw biochars in previous studies1213.…”

mentioning

confidence: 99%

Relative abundance of chemical forms of Cu(II) and Cd(II) on soybean roots as influenced by pH, cations and organic acids

Zhou

Liu

et al. 2016

Sci Rep

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“…In soil chemistry the adsorbed ions are perhaps desorbed by un-buffered salts, such as KNO 3 . The desorption data inferred the possible electrostatic interactions between the metals and solid surface (Xu et al 2005). The desorption rate in Table 2 stands for the relative contribution of electrostatic adsorption to the total amount of Cu(II) adsorbed.…”

Section: Adsorption and Desorption Of Cu(ii) And Cd(ii)mentioning

confidence: 99%

Adsorption and desorption of Cu(II) and Cd(II) in the tropical soils during pedogenesis in the basalt from Hainan, China

Zhao

Jiang

et al. 2010

Carbonates Evaporites

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Adsorption and desorption of Cu(II) and Cd(II) in the soils derived from basalts aged 10, 1,330, and 2,290 kiloyears (ky) in the tropical regions of Hainan, China were investigated. X-ray diffraction analysis indicated that the clay minerals were dominated by smectite, halloysite, and kaolinite mixed with montmorillonite in the soil derived from 10 ky-basalt and by kaolinite, halloysite, and gibbsite in the soils derived from 1,330 and 2,290 ky-basalt. Soil cation exchange capacity (CEC) decreased with the increase in basalt age, while the content of soil-free iron oxides decreased for such increase in basalt age. The amount of Cu(II) and Cd(II) adsorbed by the soil derived from 10 ky-basalt was much higher than that adsorbed by the other two soils. A similar trend was observed for the desorption of Cu(II) and Cd(II) pre-adsorbed to these soils in 1 M KNO 3 . The desorption rate of Cu(II) decreased with the increase in age of basalts. This indicated that the electrostatic adsorption of Cu(II) decreased with the increase in degree of soil development. Similarly, the specific adsorption of Cu(II) increased with increase in degree of soil development. The desorption rate of Cd(II) showed much higher than the Cu(II), which ranged from 87.5% to 92.6%. This indicated that Cd(II) was adsorbed mainly through the electrostatic attraction. Removal of soil organic matter leads to the decrease in Cu(II) adsorption and the increase in Cu(II) desorption. The overall effect of organic matter removal on the adsorption and desorption of Cd(II) and desorption rate of Cd(II) was smaller compared to Cu(II).

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“…Therefore, the removal and recovery of Cr (VI) from industrial wastewaters has been a research hot point. The distinct promising process such as the biosorption with the biomass [2][3][4][5][6][7][8][9][10] and adsorption with oxide and other low cost materials [11][12][13][14][15][16][17] was reported. Among these methods, the magnetic particle is one alternative method used for the removal of chromium ions due to the easy separation by the extracting magnetic field in the recent papers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Despite, there has been extensive study of the sorption of multi-metal components onto various kinds of bio/adsorbents, such as in bi-system of Cr (VI)-Ni (II), Cr (VI)-Fe (III), Cr (VI)-Cu (II) and Cr-SO 4 2− oxides system [1,[5][6][7]11,16]. However, the selectivity for the chromium and reversibility of biomass were not very good because there are organic groups not only binding to hexavalent chromium only and but also absorbing to others heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

Selective adsorption and separation of chromium (VI) on the magnetic iron–nickel oxide from waste nickel liquid

Wei

Yang

Wang

et al. 2009

Journal of Hazardous Materials

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Effect of Cr(VI) anions on adsorption and desorption behavior of Cu(II) in the colloidal systems of two authentic variable charge soils

Cited by 36 publications

References 23 publications

Relative abundance of chemical forms of Cu(II) and Cd(II) on soybean roots as influenced by pH, cations and organic acids

Relative abundance of chemical forms of Cu(II) and Cd(II) on soybean roots as influenced by pH, cations and organic acids

Adsorption and desorption of Cu(II) and Cd(II) in the tropical soils during pedogenesis in the basalt from Hainan, China

Selective adsorption and separation of chromium (VI) on the magnetic iron–nickel oxide from waste nickel liquid

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