Phosphate-assisted remediation of Pb(II) from Jarosite
Singh Suneeti, Singh Pushplata, Bohidar Himadri B.
Jarosite is an essential solid industrial waste material which is generated during the hydrometallurgical processing of zinc in smelters. Besides zinc and iron, Jarosite also contains toxic heavy metals like Pb, Cd, Al, Cr, Cu etc. due to which it is environmentally hazardous. Due to the presence of heavy metals, the useful Zn, Fe components cannot be utilized safely. Therefore, it is necessary to remove Pb(II), a major toxic element, to make it useful. In this report, a green process for immobilization of Pb(II) using phosphate materials (physiochemical adsorption) is discussed.
Effect of COVID-19 lockdown on heavy metal contamination in Yamuna river water of Delhi region
Lal Kanhaiya, Uttreja Mahima
An unprecedented twenty-one-day nationwide lockdown was imposed on March 24, 2020, at midnight by the Government of India as a preventive approach to contain the COVID-19 spread, which was further extended up to May 31, 2020, in three more phases. The total lockdown led to the complete closure of the industries, thus ceasing the economic activities in the nation. This hindered the speed of the flow of
Current understanding of the inhibition factors and their mechanism of action for the lignocellulosic biomass hydrolysis
Agrawal Ruchi, Verma Amit, Singhania Reeta Rani, Varjani Sunita, Di Dong Cheng, Patel Anil Kumar
Biorefining of lignocellulosic biomass is a relatively new concept but it has strong potential to develop and partially replace the fossil derived fuels and myriad of value products to subsequently reduce the greenhouse gas emissions. However, the energy and cost intensive process of releasing the entrapped fermentable sugars is a major challenge for its commercialization.
Next generation applications of lignin derived commodity products, their life cycle, techno-economics and societal analysis
Chauhan Prakram Singh, Agrawal Ruchi, Satlewal Alok, Kumar Ravindra, Gupta Ravi P., Ramakumar S.S.V.
The pulp and biorefining industries produce their waste as lignin, which is one of the most abundant renewable resources. So far, lignin has been remained severely underutilized and generally burnt in a boiler as a low-value fuel. To demonstrate lignin’s potential as a value-added product, we will review market opportunities for lignin related applications by utilizing the thermo-chemical/biological depolymerization strategies (with or without catalysts) and their comparative evaluation.