China
Africa
Explore chapters and articles related to this topic
Potential of Biochar to Immobilize Vanadium in Contaminated Soils
Published in Jörg Rinklebe, Vanadium in Soils and Plants, 2023
Ali El-Naggar, Ahmed Mosa, Avanthi D. Igalavithana, Xiao Yang, Ahmed H. El-Naggar, Sabry Shaheen, Scott X. Chang, Jörg Rinklebe
Biochar has also been proven as an efficient tool for remediation of soils contaminated with several toxic elements. The potential for biochar to adsorb toxic elements in soil depends on the physicochemical characteristics and the surface functionality of biochar (El-Naggar, Lee et al., 2019; Shaheen et al., 2018). Immobilization of toxic elements in biochar-treated soils also depends on the behavior of the toxic element, other co-existing toxic elements, and soil properties (Shaheen et al., 2018).
Biowaste-Based Microbial Fuel Cells
Published in Ram K. Gupta, Tuan Anh Nguyen, Energy from Waste, 2022
Nidhi Chauhan, Utkarsh Jain, Kirti Saxena
Biochar is a carbon-rich material developed through thermal decomposition of biomass in anaerobic conditions of low-temperature pyrolysis. Biochar is extensively used in soil amendment which enhances the availability of nutrients and improves soil quality. Biowaste such as seagrass residues, vineyard prunings, olive kernels, and sewage sludge was utilized for biochar production by pyrolysis method at two different temperatures, i.e., 250 °C and 500 °C. Biochar is used to enhance biofuel production and biomass recycling. S. cerevisiae and K. marxianus were used as microbial catalysts for bioethanol production by biochar (Kyriakou et al. 2019).
Effects of Biochars on Sorption and Desorption of Herbicides in Soil
Published in Kassio Ferreira Mendes, Interactions of Biochar and Herbicides in the Environment, 2022
Kamila Cabral Mielke, Kassio Ferreira Mendes, Tiago Guimarães
Biochars have different physicochemical properties depending on the feedstock used (Janus et al. 2015), production conditions, and nutrient content of the charred materials (Yuan et al. 2019). Biochar can be produced from various carbonaceous materials, including wood, coal, fruit peels, manure, fermentation, agricultural waste, and food processing waste (Table 5.1). Biochar produced from non-woody feedstocks, such as compost and plant residues, has high moisture, high ash content, lower calorific value, low bulk density, nutrient rich, higher pH, and less stable carbon than biochar produced from lignocellulosic feedstocks, such as wood (Mukherjee et al. 2014; Sigua et al. 2015; Jafri et al. 2018). Lignin-based feedstock can be used to produce biochar, being a widely available resource generated by pulp industries (Hu et al. 2018). However, studies using this biochar to immobilize herbicides are still scarce. The quality of biochar produced from lignin-rich waste can be very high, although the costs are also higher compared to other feedstock sources (Gul et al. 2021).
Co-carbonization of waste biomass with expanded polystyrene for enhanced biochar production
Published in Biofuels, 2023
Adewale George Adeniyi, Victor Temitope Amusa, Ebuka Chizitere Emenike, Kingsley O. Iwuozor
Through thermochemical processes, biomass can be converted into fuel alternative known as biofuel, which can be solid (char), liquid (bio-oil), or gaseous (syngas). Biochar, which is the interest of this study, is a carbon-rich product obtained by the pyrolysis of biomass in an oxygen-limited environment [17, 18]. Apart from its use as solid fuel, biochar has several other applications, including in the synthesis of bio-composites [19, 20], as an adsorbent in the removal of pollutants from solution [21, 22], and as a pozzolan in building technology [23]. In agriculture, biochar is used in soil fertility to increase cation exchange capacity, improve the populations of soil microorganisms, and reduce soil compaction [24]. The properties of biochar, which largely depend on the biomass feedstock, can generally be improved when the biomass is integrated with synthetic polymers, such as plastics, which contain a high amount of carbon and hydrogen and could act as a hydrogen donor to the biomass in the thermochemical process [25].
Global perspectives for biochar application in the remediation of heavy metal-contaminated soil: a bibliometric analysis over the past three decades
Published in International Journal of Phytoremediation, 2023
Kehui Liu, Jiayi Liang, Ningning Zhang, Guangluan Li, Jieyi Xue, Keyi Zhao, Yi Li, Fangming Yu
Under normal conditions, HMs and organic pollutants coexist in soil, and these two types of pollutants may interact in the environment, increasing the ecological risk. Biochar can potentially be used to reduce the bioavailability and leachability of HMs and organic pollutants in soil simultaneously through adsorption and other physicochemical reactions (Zhang et al.2013). Changes in the bioavailability and leachability of pollutants are more complex than expected. For example, a 60-day field exposure study conducted by Beesley et al. (2010) showed that Cu and As concentrations in soil pore water increased more than 30-fold with biochar amendment, which was associated with significant increases in dissolved organic carbon and pH, whereas Zn and Cd decreased significantly.
Decaffeination of wastewater using activated carbon produced from velvet tamarind-pericarp (Dialium Guineense)
Published in International Journal of Phytoremediation, 2022
Babalola Aisosa Oni, Samuel Eshorame Sanni, Samuel Olatunde Dahunsi, Bisike Chidiebere Egere
Some of the benefits of the adsorbent described in this study include (a) it is eco-friendly and an economically viable/alternative treatment technology for wastewater, soil, air and water; this technology can be used for the elimination of heavy metals from wastewaters with high efficiency and specificity, less sludge or chemical formation. It may require additional constituents/activators for improved performance and can be easily regenerated. It also entails a cheap production process for the treatment of large volumes of wastewaters, and can be tested for its capacity to remove some heavy metals from wastewaters; it can also function over a wide range of conditions including temperature, pH, metal ion concentrations etc. Biosorption reduces a large volume of harmful substances (Pereira et al.2016; Samuel et al.2017; Yamamoto et al.2019). Biochar has agricultural benefits which makes for improved soil fertility and its capacity to withstand droughts and flooding. Biochar has the capacity for removing heavy metals and other contaminants from contaminated streams/wastewaters and soils. Biochar can also sequester the equivalence of 29 billion tons of CO2 if applied within 10% of the global cropland (Fazal-Ur-Rehman 2018).