This work investigates the removal of phenol from aqueous solution using Araucaria Columnaris bark (ACB) as biochar. Five different types of biochars were developed through pyrolysis at different temp from 300 to 500°C. The effects of initial concentration, contact time, pH and temperature on adsorption behavior were studied in batch mode for each biochar. The optimum contact time observed for equilibrium condition was 60 mins for every biochar. And, the maximum adsorption followed the order 298 K > 308 K > 318 K. Adsorption equilibrium data were fitted to Langmuir and Freundlich isotherms by non-linear regression method and kinetic data by linear regression method, and fitted to pseudo-first order, pseudo-second order and Intraparticle diffusion models. Adsorption kinetics was reasonably described by pseudo-second order model with R 2 value 0.99. Thermodynamic parameters were also estimated that implied, the adsorption process was spontaneous and exothermic in nature. Study further showed that the acidic pH increased adsorption capacity of biochar but decreases continuously towards basic side. The removal of phenol with prepared biochar was achieved as high as 100 % for ACB-500. The maximum iodine adsorption value of prepared biochar was found to be 453.3 mg/g.
Plants can be used in the cleanup and prevention of environmental pollution. This relatively new and green technology that uses natural processes to break down, stabilize, or accumulate pollutants. Phytoremediation-related processes might amend the situation or chemical makeup of contaminants. Multidisciplinary studies will help to develop a better understanding of the ecological interactions that contribute to phytoremediation, the effects of phytoremediation on ecological relationships, and the movement of pollutants through ecosystems. Phytoremediation, requires careful choice of plant species and management practices are key to promoting ecological restoration and preventing pollutant dispersal. Native/local plant species with effective remediation properties should be used that provide natural hydraulic control and soil stabilization should be selected.
Aims: To elucidate the impacts of fluorine contamination in soil at various levels on soil enzymatic activities, as well as the effects of adding biochar made from sugarcane bagasse and modified with alum and phosphoric acid to the substrate to reduce the deleterious effects of fluorine. Study Design: The pot experiment was carried under factorial CRD (complete randomized design). Place and Duration of Study: The pot experiment followed by laboratory analysis was conducted in the Net house of Centre for Environment Assessment & Climate Change, G.B. Pant National Institute of Himalayan environment, Kosi-Katarmal, Almora (UK), India during Rabi season (January to March) 2022. Methodology: The present study was undertaken with 2 levels of fluoride (Factor A) and 3 levels of each three types of biochar viz. non activated biochar, phosphoric acid activated biochar and alum treated biochar with a control (no biochar) i.e. 10 treatments of biochar (Factor B). The combination of Factor A and Factor B comprises 20 treatment combinations with three replicates. The soil enzymes such as urease, dehydrogenase, acid phosphatase and alkaline phosphatase, were examined in the postharvest soil sample. Results: The outcomes demonstrated that the soil enzymatic activity of post-harvest soil under spinach crop was greatly improved with the application of fluoride in case of soil dehydrogenase, acid phosphatase and alkaline phosphatase except soil urease. Application of alum modified biochar and phosphoric acid modified biochars at different application rates significantly all the 4 studied soil enzymatic activities. Compared to the control, PAMB40 increases the urease, dehydrogenase, acid phosphatase and alkaline phosphatase by 32.71, 58.83, 142.60 and 31.10%, respectively. Conclusion: This study suggested that biochar treated with phosphoric acid and alum might be utilised as a long term improvement to enhance quality of soil, the importance of which would be vital for agriculture.
The environment is deteriorating rapidly, and it is essential to restore it as soon as possible. Biochar is a carbon-rich pyrolysis result of various organic waste feedstocks that has generated widespread attention due to its wide range of applications for removing pollutants and restoring the environment. Biochar is a recalcitrant, stable organic carbon molecule formed when biomass is heated to temperatures ranging from 300°C to 1000°C under low (ideally zero) oxygen concentrations. The raw organic feedstocks include agricultural waste, forestry waste, sewage sludge, wood chips, manure, and municipal solid waste, etc. Pyrolysis, gasification, and hydrothermal carbonization are the most frequent processes for producing biochar due to their moderate operating conditions. Slow pyrolysis is the most often used method among them. Biochar has been utilised for soil remediation and enhancement, carbon sequestration, organic solid waste composting, water and wastewater decontamination, catalyst and activator, electrode materials, and electrode modification and has significant potential in a range of engineering applications, some of which are still unclear and under investigation due to its highly varied and adjustable surface chemistry. The goal of this chapter is to look into the prospective applications of biochar as a material for environmental remediation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.