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Effective immobilisation of chromium in a polluted calcareous soil using modified biochar and bacterial inoculation
Chemistry and Ecology ( IF 2.5 ) Pub Date : 2020-07-06 , DOI: 10.1080/02757540.2020.1789117
Zahra Zibaei 1 , Reza Ghasemi-Fasaei 1 , Abdolmajid Ronaghi 1 , Mehdi Zarei 1 , Sedigheh Zeinali 2
Affiliation  

ABSTRACT Immobilisation is among efficient strategies in the remediation of heavy metals, including chromium (Cr)-polluted soils. A greenhouse trial was conducted to investigate the effectiveness of chitosan- and hematite-modified biochar and bacterial inoculations on the immobilisation of Cr in polluted soil under maize cultivation. Application of modified biochars and inoculation with Pseudomonas putida significantly increased both maize root and shoot dry matter yields but decreased Cr phytoextraction efficiency. Root and shoot concentration and uptake as well as mean translocation factor of Cr drastically decreased following the application of unmodified or modified biochars. Bacterial inoculation significantly decreased mean translocation factor and also root and shoot concentration and shoot uptake of Cr. Chitosan-modified biochar was the most influential treatment in decreasing Cr uptake by maize followed by pseudomonas putida inoculation treatment. Results reported herein demonstrated satisfied impacts of chitosan-modified biochar and inoculation with pseudomonas putida in increasing dry matter yield and decreasing Cr uptake in maize grown on Cr-polluted soil. According to the results of present study, modified biochars application and bacterial inoculation are influential treatments which prevent Cr toxicity probably through the transformation of mobile and mobilisable Cr forms to unavailable form in soil.

中文翻译:

使用改性生物炭和细菌接种有效固定污染钙质土壤中的铬

摘要 固定化是修复包括铬 (Cr) 污染土壤在内的重金属的有效策略之一。进行了一项温室试验,以研究壳聚糖和赤铁矿改性的生物炭和细菌接种对玉米种植污染土壤中铬固定的有效性。改性生物炭的应用和恶臭假单胞菌接种显着增加了玉米根和芽干物质产量,但降低了 Cr 植物提取效率。在施用未改性或改性的生物炭后,根和芽的浓度和吸收以及 Cr 的平均易位因子急剧下降。细菌接种显着降低了平均易位因子以及根和枝条浓度以及枝条对 Cr 的吸收。壳聚糖改性生物炭是降低玉米 Cr 吸收的最有影响的处理,其次是恶臭假单胞菌接种处理。本文报告的结果表明,壳聚糖改性生物炭和接种恶臭假单胞菌在增加干物质产量和减少铬污染土壤上生长的玉米的铬吸收方面的影响令人满意。根据目前的研究结果,改性生物炭的应用和细菌接种是预防 Cr 毒性的有影响的处理方法,可能是通过将可移动和可移动的 Cr 形式转化为土壤中的不可利用形式。本文报告的结果表明,壳聚糖改性生物炭和接种恶臭假单胞菌在增加干物质产量和减少铬污染土壤上生长的玉米的铬吸收方面的影响令人满意。根据目前的研究结果,改性生物炭的应用和细菌接种是预防 Cr 毒性的有影响的处理方法,可能是通过将可移动和可移动的 Cr 形式转化为土壤中的不可利用形式。本文报告的结果表明,壳聚糖改性生物炭和接种恶臭假单胞菌在增加干物质产量和减少铬污染土壤上生长的玉米的铬吸收方面的影响令人满意。根据目前的研究结果,改性生物炭的应用和细菌接种是预防 Cr 毒性的有影响的处理方法,可能是通过将可移动和可移动的 Cr 形式转化为土壤中的不可利用形式。
更新日期:2020-07-06
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