The effect of biochar and crop straws on heavy metal bioavailability and plant accumulation in a Cd and Pb polluted soil

Xu, Pei; Sun, Caixia; Ye, Xuezhu; Xiao, Wendan; Zhang, Qi; Wang, Qiang

doi:10.1016/j.ecoenv.2016.05.031

Cited by 242 publications

(73 citation statements)

References 32 publications

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“…12 . Total N and P were determined according to the Kjeldahl and molybdenum antimony blue colorimetry methods, respectively 6 . The total HMs in FC and TG soil, bamboo biochar and MSC were measured by ICP-AES 43 .…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The major sources of HMs are textile, energy and power, mining and smelting, coal combustion for energy purposes in large industries, agricultural practices (fertilizers and pesticides) and municipal wastes 4, 5 . The effects of HMs on plant and human health have been widely studied 6–8 . HMs enrichment affect soil enzymatic activities and the biosynthesis of chlorophyll, decrease respiration and limit antioxidant enzymatic activities, and even lipid peroxidation in plant cells 9 .…”

Section: Introductionmentioning

confidence: 99%

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Using bamboo biochar with compost for the stabilization and phytotoxicity reduction of heavy metals in mine-contaminated soils of China

Ali

Guo

Zhang

et al. 2017

Sci Rep

109

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Anthropogenic activities have transformed the global geochemical cycling of heavy metals (HMs). Many physical, chemical and biological methods are used to reduce the toxicity of HMs to humans, plants and environment. This study aimed to investigate the immobilization and phytotoxicity reduction of HMs after application of bamboo biochar (BB) in mine-polluted soil in Feng county (FC) and Tongguan (TG). The results showed that BB application to contaminated soil immobilized HMs (Zn, Pb, Cd and Cu). The soil pH and EC increased and the bioavailability of HMs decreased in FC and TG, whereas Pb and Cu increased in TG soil. The addition of BB reduced HMs uptake in the shoot/root of Brassica juncea. Physiological responses showed that BB application improved the shoot/root growth, dry biomass, and enhanced the chlorophyll (a and b) and carotenoid concentrations in Brassica. The incorporation of BB improved the soil health and accelerated enzymatic activities (β-glucosidase, alkaline phosphatase and urease) in HMs polluted soils. Antioxidant activities (POD, PPO, CAT and SOD) were also used as biomarkers to determine the negative effects of HMs on the growth of Brassica. Overall, the immobilization potential and phytotoxicity reduction of HMs were confirmed by BCF, TF and MEA for both soils.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using bamboo biochar with compost for the stabilization and phytotoxicity reduction of heavy metals in mine-contaminated soils of China

Ali

Guo

Zhang

et al. 2017

Sci Rep

109

View full text Add to dashboard Cite

show abstract

“…5) and found that the biochar application increased soil pH effectively, while the increase in soil pH by biochar could affect the supply of soil nutrients to plants indirectly (Liu et al 2016b). Xu et al (2016) indicated that biochar amendments may decrease the availability of nutrients other than metals, which could result in plant deficiency. Thus, we suggest that excessively high biochar application inhibited the growth of rice because of the high pH and adsorption capacity of biochar.…”

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

confidence: 99%

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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“…Previous studies showed that the transfer and accumulation characteristics of heavy metals in different soil-crop systems are different [55,56]. Therefore, the accumulation effects of heavy metals in crops should be considered when evaluating the pollution degree of heavy metals in farmland soils.…”

Section: Soil-crop Collaborative Risk Assessment Modelmentioning

confidence: 99%

“…This result suggests that the concentrations of the heavy metals in crops are similar to those in soil, albeit with some subtle differences. Given that different heavy metals have different transfer and accumulation characteristics in different crop varieties [55,56], the concentration of heavy metals in crops will also be different despite being in the same field soil growth. This condition implies that crop varieties that are resistant to heavy metals should be cultivated in areas that are slightly or moderately polluted by heavy metals.…”

Section: Risk Assessment Of Heavy Metal Pollution In Farmland Soilsmentioning

confidence: 99%

Risk Assessment System Based on WebGIS for Heavy Metal Pollution in Farmland Soils in China

Pan

Wang

et al. 2017

Sustainability

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Heavy metal pollution in farmlands is a serious threat to sustainable agricultural development and has become a major agro-ecological problem that has attracted public concern in China. This study proposes a soil-crop collaborative risk assessment model that aims to assess the potential safety risks of heavy metal pollution in farmland soils by considering the concentrations of heavy metals in soils and the accumulation effects of heavy metals in crops. Based on these effects, a decision support system for risk assessment of heavy metal pollution in farmland soil is established, in which technologies such as web-based geographic information system, quick response code, radio frequency identification, and web service are introduced as the bases. The proposed system is composed of a mobile data acquisition terminal (MDAT) and a web-based information system (WIS). The MDAT, which is a portable computerized device running on the Android platform, is used for data acquisition or query, and the WIS is used for risk assessment, data management, and information visualization. The system is employed in some county-level cities in China for risk assessment and supervision of heavy metal pollution in farmlands. The practical application results show that the system provides highly efficient decision support for risk assessment of heavy metal pollution in farmland soils.

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The effect of biochar and crop straws on heavy metal bioavailability and plant accumulation in a Cd and Pb polluted soil

Cited by 242 publications

References 32 publications

Using bamboo biochar with compost for the stabilization and phytotoxicity reduction of heavy metals in mine-contaminated soils of China

Using bamboo biochar with compost for the stabilization and phytotoxicity reduction of heavy metals in mine-contaminated soils of China

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

Risk Assessment System Based on WebGIS for Heavy Metal Pollution in Farmland Soils in China

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