A critical review on bioremediation technologies for Cr(VI)-contaminated soils and wastewater

Xia, Shaopan; Song, Zhaoliang; Jeyakumar, Paramsothy; Shaheen, Sabry M.; Rinklebe, Jörg; Ok, Yong Sik; Bolan, Nanthi; Wang, Hailong

doi:10.1080/10643389.2018.1564526

Cited by 355 publications

(147 citation statements)

References 251 publications

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“…Stimulation of the soil microbial community with the addition of biochar assisted the conversion of Cr(VI) into less toxic Cr(III). This was mainly due to the provision of C and protons to support microbial activities in the soil (Ahmad et al 2014;Choppala et al 2012;Herath et al 2017;Mandal et al 2017;Xia et al 2019). Moreover, chicken manure-derived biochar was used in a Cu-contaminated soil to reduce Cu bioavailability successfully and increase microbial activity in the soil because of the storage of Cu in metal-tolerant structures of the soil microbes (Meier et al 2017a).…”

Section: Response Of Soil Microbes To Biochar Amendment In Contaminatmentioning

confidence: 99%

Response of microbial communities to biochar-amended soils: a critical review

Palansooriya

Wong

Hashimoto

et al. 2019

Biochar

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Application of biochar to soils changes soil physicochemical properties and stimulates the activities of soil microorganisms that influence soil quality and plant performance. Studying the response of soil microbial communities to biochar amendments is important for better understanding interactions of biochar with soil, as well as plants. However, the effect of biochar on soil microorganisms has received less attention than its influences on soil physicochemical properties. In this review, the following key questions are discussed: (i) how does biochar affect soil microbial activities, in particular soil carbon (C) mineralization, nutrient cycling, and enzyme activities? (ii) how do microorganisms respond to biochar amendment in contaminated soils? and (iii) what is the role of biochar as a growth promoter for soil microorganisms? Many studies have demonstrated that biochar-soil application enhances the soil microbial biomass with substantial changes in microbial community composition. Biochar amendment changes microbial habitats, directly or indirectly affects microbial metabolic activities, and modifies the soil microbial community in terms of their diversity and abundance. However, chemical properties of biochar, (especially pH and nutrient content), and physical properties such as pore size, pore volume, and specific surface area play significant roles in determining the efficacy of biochar on microbial performance as biochar provides suitable habitats for microorganisms. The mode of action of biochar leading to stimulation of microbial activities is complex and is influenced by the nature of biochar as well as soil conditions.

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Section: Response Of Soil Microbes To Biochar Amendment In Contaminatmentioning

confidence: 99%

Response of microbial communities to biochar-amended soils: a critical review

Palansooriya

Wong

Hashimoto

et al. 2019

Biochar

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510

160

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“…When heavy metal ions are close to the benzene ring, the electron cloud of benzene ring can be polarized and produce a weak electrostatic effect, which leads to physisorption (Gomez-Eyles and Ghosh 2018). Biochar accomplishes chemisorption of heavy metals by surface functional groups (Xia et al 2019). Besides, biochar is more alkaline and can significantly increase soil pH, which indirectly reduces the bioavailability of heavy metals (Huang et al 2018a, b).…”

Section: Contamination Controlmentioning

confidence: 99%

Past, present, and future of biochar

Chen

Meng

Han

et al. 2019

Biochar

343

141

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After entering the twenty-first century, biochar has become a focal point of multidisciplinary research because of its special characteristics, broad application, and promising development prospects. Basic and applied research on the application of biochar in the areas of agriculture, environment, and energy have increased dramatically in the face of food security, environmental pollution, and energy shortage. Although there are some disputes about biochar research, many studies have demonstrated the importance of biochar research from the perspective of scientific advancement and practical application. This paper briefly recalls the history of biochar application; introduces research progress on the basic characteristics of biochar and its associated production technologies; summarizes the research status and existing problems of biochar application in the areas of agriculture, environment, and energy; and analyzes the potential problems and development trends of biochar research in the future.

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“…Thus, the application of steelmaking slags as low-cost adsorbents is constrained by the potential concomitant dissolution and speciation of these toxic metal elements under different environmental conditions. The environmental impact of steelmaking slags is further exacerbated by the high toxicity and potential mobility of these elements, particularly chromium, in environmental ecosystems [22][23][24]159,[179][180][181][182][183][184][185].…”

Section: Environmental Challenges Of Steelmaking-slag-based Adsorbentsmentioning

confidence: 99%

Ironmaking and Steelmaking Slags as Sustainable Adsorbents for Industrial Effluents and Wastewater Treatment: A Critical Review of Properties, Performance, Challenges and Opportunities

et al. 2020

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This paper critically discusses the structure, properties and applications of ironmaking and steelmaking slags and their silicate-based variants as low-cost adsorbents for removing cations and anions from industrial effluents and wastewater. Undoubtedly, the performance of slag-based adsorbents depends on their physical, chemical and phase chemical properties. The presence of crystalline phases, for example, has a significant effect on the adsorption capacity. However, despite their low cost and ubiquity, their chemical and geometric heterogeneity significantly affects the performance and applications of slag-based adsorbents. These challenges notwithstanding, the efficacy of slag-based adsorbents can be significantly enhanced through purposeful activation to increase the specific surface area and density of adsorption sites on the surfaces of adsorbent particles. The synthesis of functionalised adsorbents such as geopolymers, zeolites and layered double hydroxides from silicate and aluminosilicate precursors can also significantly increase the performance of slag-based adsorbents. In addition, the ability to stabilise the dissolved and/or entrained toxic metal species in stable phases in slags, either through controlled post-process fluxing or crystallisation, can significantly enhance the environmental performance of slag-based adsorbents. Most critical in the design of future slag-based adsorbents is the integration of the engineered properties of molten and solidified slags to the recovery and stabilisation of dissolved and/or entrained metals.

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A critical review on bioremediation technologies for Cr(VI)-contaminated soils and wastewater

Cited by 355 publications

References 251 publications

Response of microbial communities to biochar-amended soils: a critical review

Response of microbial communities to biochar-amended soils: a critical review

Past, present, and future of biochar

Ironmaking and Steelmaking Slags as Sustainable Adsorbents for Industrial Effluents and Wastewater Treatment: A Critical Review of Properties, Performance, Challenges and Opportunities

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