Adsorption of heavy metal ions on soils and soils constituents

Bradl, H.

doi:10.1016/j.jcis.2004.04.005

Cited by 1,654 publications

(977 citation statements)

References 152 publications

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“…Soil pH is considered an important factor affecting the migration and transformation of heavy metals (Bradl 2004). Soil pH is one of the most important factors causing high levels of Cd accumulation in rice (Kögel-Knabner et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale

Liu

Tian

Jiang

et al. 2016

Environ Sci Pollut Res

149

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Rice is a staple food by an increasing number of people in China. As more issues have arisen in China due to rice contaminated by cadmium (Cd), Cd contamination in arable soils has become a severe problem. In China, many studies have examined Cd contamination in arable soils on a national scale, but little studies have focused on the distribution of Cd in paddy fields. This study explored the spatial pattern of Cd in paddy soils in China, made a preliminary evaluation of the potential risk, and identified the most critically contaminated regions based on the domestic rough rice trade flow. The results showed that Cd concentrations in paddy soils in China ranged from 0.01 to 5.50 mg/kg, with a median value of 0.23 mg/kg. On average, the highest Cd concentrations were in Hunan (0.73 mg/kg), Guangxi (0.70 mg/kg), and Sichuan (0.46 mg/ kg) provinces. Cd concentrations in paddy soils in central and western regions were higher than those in eastern regions, especially the southeastern coastal regions. Of the administrative regions, Cd standard exceedance rate was 33.2 %, and the heavy pollution rate was 8.6 %. Regarding to Cd of paddy soil, soil environmental quality was better in Northeast China Plain than in Yangtze River Basin and southeastern coastal region. Mining activities were the main anthropogenic pollution source of Cd in Chinese paddy soil. Based on rice trade, more of the Chinese population would be exposed to Cd through intake of rice produced in Hunan province. Certain regions that output rice, especially Hunan province, should be given priority in the management and control of Cd contamination in paddy soil.

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Section: Discussionmentioning

confidence: 99%

Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale

Liu

Tian

Jiang

et al. 2016

Environ Sci Pollut Res

149

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“…4). Because the number of negatively charged surface sites in soil increases with increasing pH, and the sorption capacity of soil to cationic metals correspondingly increases (Bradl 2004). The pH increase subsequent to the application of biochar can also reduce metal extractability through promoting metal (co)precipitation as well as metal adsorption on specific biochar mineral phases (Houben et al 2013;Rees et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

Zheng

Chen

Cai

et al. 2015

Environ Sci Pollut Res

135

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A field experiment was conducted to investigate the effect of bean stalk (BBC) and rice straw (RBC) biochars on the bioavailability of metal(loid)s in soil and their accumulation into rice plants. Phytoavailability of Cd was most dramatically influenced by biochars addition. Both biochars significantly decreased Cd concentrations in iron plaque (35-81 %), roots (30-75 %), shoots (43-79 %) and rice grain (26-71 %). Following biochars addition, Zinc concentrations in roots and shoots decreased by 25.0-44.1 and 19.9-44.2 %, respectively, although no significant decreases were observed in iron plaque and rice grain. Only RBC significantly reduced Pb concentrations in iron plaque (65.0 %) and roots (40.7 %). However, neither biochar significantly changed Pb concentrations in rice shoots and grain. Arsenic phytoavailability was not significantly altered by biochars addition. Calculation of hazard quotients (HQ) associated with rice consumption revealed RBC to represent a promising candidate to mitigate hazards associated with metal(loid) bioaccumulation. RBC reduced Cd HQ from a 5.5 to 1.6. A dynamic factor's way was also used to evaluate the changes in metal(loid) plant uptake process after the soil amendment with two types of biochar. In conclusion, these results highlight the potential for biochar to mitigate the phytoaccumulation of metal(loid)s and to thereby reduce metal(loid) exposure associated with rice consumption.

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“…(6) and (7)). Inner-sphere complexes were with coordinate-covalent bonding as the primary force and stable than the outer-sphere complexes in which electrostatic bonding was the main bonding force [59].…”

Section: Pb(ii) Adsorptionmentioning

confidence: 96%

“…It was mainly through the complexation between the Pb 2+ and deprotonated surface hydroxyl group [58]. Pb 2+ acted as a Lewis while the functional surface hydroxyl group ("MAOH) acted as Lewis basis in deprotonated form [59]. The mono and binuclear inner-sphere complexes were formed (Eqs.…”

Section: Pb(ii) Adsorptionmentioning

confidence: 99%

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

Liang

Zhu

Wei

et al. 2014

Journal of Colloid and Interface Science

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Adsorption of heavy metal ions on soils and soils constituents

Cited by 1,654 publications

References 152 publications

Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale

Cadmium (Cd) distribution and contamination in Chinese paddy soils on national scale

Mitigating heavy metal accumulation into rice (Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

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