A novel green substrate made by sludge digestate and its biochar: Plant growth and greenhouse emission

Zhang, Xinying; Xie, Huanhuan; Liu, Xiaoyan; Kong, Dewen; Zhang, Shenyu; Wang, Chuanhua

doi:10.1016/j.scitotenv.2021.149194

Cited by 10 publications

(5 citation statements)

References 57 publications

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“…The transformation of sewage sludge to biochar via pyrolysis provides a feasible approach for the safe disposal of the sludge (Buss 2021;Zhang et al 2021f ). The sewage sludge-derived biochar had a much lower leaching potential of heavy metals than the sewage sludge itself (Wang et al 2021d;Xiong et al 2021).…”

Section: Biochar For Toxic Metal Immobilizationmentioning

confidence: 99%

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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As a bioproduct from the thermal decomposition of biomass, biochar has various applications in diversified field. In this study, a bibliometric analysis was conducted to visualize the current research status and trends of biochar research. A total of 5535 documents were collected from the Web of Science Core Collection and subjected to visualization analysis for the biochar field's development in 2021 with CiteSpace software. The visual analysis results demonstrate that the number of publications expanded dramatically in 2021, and the growth trend would continue. China and USA were the most contributing countries in biochar research in terms of the number of publications. Based on the keyword co-occurrence analyses, “Biochar for toxic metal immobilization”, “Biochar-based catalyst for biofuel production”, “Biochar for global climate change mitigation”, “Biochar for salinity and drought stress amelioration”, “Biochar amendment in composting”, and “Biochar as additives in anaerobic digestion” were the main research trends and hotspots in this field in 2021. This indicates that the biochar research was multidisciplinary. Regarding the research hotspots, the employment of biochar as heterogeneous catalysts for biofuel production gained great attention in 2021. On the contrary, bioremediation using functional bacteria immobilized on biochar and biochar-assisted advanced oxidation process were well-studied but with less frequency than other topics in 2021. Furthermore, the future research was proposed for green and sustainable applications of biochar. This review provides a comprehensive overview of the research frontiers, the evolution of research hotspots, and potential future research directions in the biochar field. Graphical Abstract

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Section: Biochar For Toxic Metal Immobilizationmentioning

confidence: 99%

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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“…However, the potential ecological risks that come with its use are still unclear and a cause for concern. Conversion of sludge to biochar through pyrolysis can be an effective way to achieve solidification of heavy metals [83,85], and other studies have found that biochar reduces the risk of heavy metal uptake by plants but decreases over time, and its effectiveness is yet to be fully explored [79].…”

Section: Discussionmentioning

confidence: 99%

Global Bibliometric Analysis of Research on the Application of Biochar in Forest Soils

Chen,

Gao,

Chen

et al. 2023

Forests

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Considering the impacts of global climate change, paths for sustainable development are of particular importance. Biochar has multiple advantages, including but not limited to climate change mitigation, waste management, soil fertility improvement, and pollution remediation. Forest soils play a significant role in terrestrial ecosystems. The application of biochar in forest soils (ABFS) is therefore considered an essential tool for improving soil quality, capturing carbon, and reducing greenhouse gas emissions. The Web of Science Core Collection database was utilized for the bibliometric analysis of ABFS publications published between 2002 and 2022. Three bibliometric software were used to analyze bibliometrics, networks, and research directions for ABFS: Bibliometrix, VOSviewer, and CiteSpace. The analysis shows that research on ABFS is always rapidly developing. Research on ABFS is engaged globally in a complex network of collaborations, and the main research has occurred in China and the United States. Collaboration among authors is relatively diffuse. Research on ABFS involves interdisciplinary integration. In the early stages of research, the origin of biochar (history and boreal forests) and its characteristics (dynamics, nitrogen content, and chemical composition) were the focus of attention. As research progressed, more attention was given to ABFS (carbon, organic matter, vegetation, and heavy metals). Our research shows that while ABFS research has a certain history, its development trend has been consistently upward and shows no signs of declining. Thus, future research will likely concentrate on ABFS. Due to the complexity of biochar functions, ample research opportunities exist in ABFS.

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“…The results showed that the seedling survival rate and individual biomass of ryegrass in substrate were 100% and 100.02 mg, which were 14.4% and 231.4% higher than those in only SSAD, but were 1.3% and 19.6% higher than those in soil. (Zhang et al, 2021) Pot experiments with maize plants grown with SS, SS and additional mineral fertilizers and mineral fertilizers as control showed that SS alone and in combination with potassium fertilizers does not provide maize plants with mineral nutrients in appropriate amounts. However the combination of SS with mineral fertilizers significantly improves plant growth and promotes their development.…”

Section: економічні інноваціїmentioning

confidence: 99%

“…Both sole application of SS and their respective biochars provided enough P for the plants to achieve biomass higher than conventional P-fertilizer. Properties of sewage sludge-derived biochar depend on the properties of sewage sludge and also the temperature of pyrolysis (Zielińska et al, 2015).…”

Section: економічні інноваціїmentioning

confidence: 99%

Ensuring Sustainable Development of Agriculture Based on the Use of Sewage Sludge

Alsiņa¹,

Dubova²,

Kassien³

et al. 2022

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Topicality. The events of recent years (the Covid-19 pandemic, hostilities in Ukraine) have led to a significant increase in world food prices. Thus, the FAO price index in February 2022 reached a historic high of 140.7 percentage points. One of the significant factors in this situation is a significant increase in prices for fertilizers for agriculture, which leads to their shortage. This actualizes the search for a solution to the problem of using sewage sludge as biological resource for sustainable agriculture and ensuring the implementation of sustainable development goals, including goals 2, 6, 11, 12, 15.Aim and tasks. The purpose of the article is to analyze various aspects of the use of sewage sludge in agricultural production as one of the promising ways to achieve sustainable development goals.Research results. The content of organic matter in the sludge can improve the physical, chemical, and biological properties of the soil by ensuring better soil cultivation and water retention capacity, especially when dehydrated sewage sludge is used. Biosolids reduce runoff and increase surface water retention. Organic nitrogen in sludge is much less likely to cause groundwater pollution than chemical nitrogen fertilizers. The use of sewage sludge on agricultural land is the best way to recycle the nutrients it contains. Sewage sludge can therefore be considered an important biological resource for sustainable agriculture. Physico-chemical characteristics of sewage sludge of different origin were compared. The concentration of carbon, nitrogen, and phosphorus were similar. Nevertheless, there are some site-specific factors that make each sewage sludge unique and must be taken into account to predict the outcome of sewage sludge treatment. To achieve the goal, an analysis was made of the effect of sewage sludge on the physico-chemical and microbial properties of the soil; its impact on plants and their productivity; the problems of using soil sludge in agriculture, taking into account its contamination with various substances (heavy metals, microplastics and pharmaceuticals), have been studied.Conclusions. Sewage sludge is a promising fertilizer for sustainable agriculture, taking into account the need for an effective technology for its purification from hazardous substances.

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A novel green substrate made by sludge digestate and its biochar: Plant growth and greenhouse emission

Cited by 10 publications

References 57 publications

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Global Bibliometric Analysis of Research on the Application of Biochar in Forest Soils

Ensuring Sustainable Development of Agriculture Based on the Use of Sewage Sludge

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