Biochar soil amendment as a solution to prevent Cd-tainted rice from China: Results from a cross-site field experiment

Bian, Rongjun; De, Chen; Liu, Xiaoyu; Cui, Liqiang; Li, Lianqing; Pan, Genxing; Xie, Dan; Zhang, Xuhui; Zheng, Jufeng; Chang, Andrew C.

doi:10.1016/j.ecoleng.2013.07.031

Cited by 216 publications

(82 citation statements)

References 29 publications

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“…The rice Cd uptake decreased gradually with increasing biochar application. This result is similar to that of Bian et al (2013), who indicated that biochar effectively immobilized Cd and greatly reduced rice Cd uptake in long-term contaminated rice paddies; biochar amendment at 40 t ha −1 could even allow rice Cd levels to meet the guideline limit of 0.4 mg/kg suggested by the CAC (Codex Alimentarius Commission), FAO (Food and Agriculture Organization of the United Nations), and WHO (World Health Organization) (2005).…”

Section: Changes In Dry Matter Accumulation In Rice CD Uptake By Ricsupporting

confidence: 73%

Effects of Biochar on Cadmium Accumulation in Rice and Cadmium Fractions of Soil: A Three-Year Pot Experiment

Meng

Chen

et al. 2016

BioResources

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Section: Changes In Dry Matter Accumulation In Rice CD Uptake By Ricsupporting

confidence: 73%

Effects of Biochar on Cadmium Accumulation in Rice and Cadmium Fractions of Soil: A Three-Year Pot Experiment

Meng

Chen

et al. 2016

BioResources

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“…Compared to the bulk soil, the MBB was found to contain much higher levels of organic carbon, HWEC, N, P, K, and even heavy metals (Cd, Pb, Cu, Zn, and Ni). Due to the high pyrolysis temperature, the ash content in MBB was much higher than the wheat straw biochar (ash 20.8%) previously reported in the works by Zhang et al (2013) and Bian et al (2013). However, it was much similar to some other biochars reported by Chen et al (2011), Bird et al (2012, and Méndez et al (2012).…”

Section: Properties and Crop Growth Changes With Mbbmentioning

confidence: 42%

“…Compared to the control, the pH of MBBtreated soil was significantly increased by 0.8 and 0.7 during the rice and wheat seasons, respectively. Bian et al (2013) reported a negative correlation between soil available Cd and pH in a cross-site field experiment with wheat straw biochar treatment in China. Thus, the increase in soil pH after MBB application could immobilize soil metals to insoluble forms by precipitation or formation of hydroxide complexes, carbonates, or Bian et al (2014).…”

Section: Changes In Metal Bioaccumulation By Plantmentioning

confidence: 99%

Effect of Municipal Biowaste Biochar on Greenhouse Gas Emissions and Metal Bioaccumulation in a Slightly Acidic Clay Rice Paddy

Bian¹,

Zhang²,

Li³

et al. 2013

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A field trial was performed to investigate the effect of municipal biowaste biochar (MBB) on rice and wheat growth, metal bioaccumulation, and greenhouse gas emissions in a rice paddy in eastern China. MBB was amended in 2010 before rice transplanting at rates of 0 and 40 t ha -1 in a field experiment lasting one cropping year. MBB soil amendment significantly increased soil pH, total soil organic carbon, and total nitrogen. The growth and grain yield of rice and wheat was not affected with MBB application at 40 t ha -1 . MBB amendment did not influence the soil availability of Pb, Cu, and Ni, but significantly increased the soil availability of Zn and decreased the soil availability of Cd during both rice and wheat seasons. While MBB did not change the bioaccumulation of Pb, Cu, and Ni, the rice and wheat Cd accumulation was significantly reduced, and wheat Zn accumulation slightly increased with MBB amendment. Furthermore, total N 2 O emission during both rice and wheat seasons was greatly decreased, though total seasonal CH 4 emission was significantly increased in the rice season. On the other hand, soil CO 2 emission remained unaffected across crop seasons. Thus, MBB can be used in rice paddy for low carbon and low-Cd grain production, but the long-term effects remain unknown.

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“…Further to these studies, large decreases in Cd, Zn, and Pb accumulation in rice plant grown in a historically contaminated soil after biochar additions were observed in our previous pot study . Biochar amendment to soil has recently been reported to reduce Cd accumulation in rice plant from Cdcontaminated rice paddies (Cui et al 2011;Bian et al 2013). However, not all metal(loid)s have shown such positive response to biochar amendment to soil.…”

Section: Introductionmentioning

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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Biochar soil amendment as a solution to prevent Cd-tainted rice from China: Results from a cross-site field experiment

Cited by 216 publications

References 29 publications

Effects of Biochar on Cadmium Accumulation in Rice and Cadmium Fractions of Soil: A Three-Year Pot Experiment

Effects of Biochar on Cadmium Accumulation in Rice and Cadmium Fractions of Soil: A Three-Year Pot Experiment

Effect of Municipal Biowaste Biochar on Greenhouse Gas Emissions and Metal Bioaccumulation in a Slightly Acidic Clay Rice Paddy

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

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