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Biochar is a low-cost material that has found wide applications as an adsorbent for the removal of various pollutants. The aim of this study is to evaluate the porosity of biochar derived from agricultural solid wastes such as date stones. For this reason, this research focused on the optimization of the factors influencing the preparation of biochar by pyrolysis using experimental designs. The two factors were taken into account in the two-level complete factorial plan used for optimization. The experimental responses studied were the yield of biochar, the iodine adsorption (I2), and the methylene blue (MB) adsorption indexes.&nbsp

The management of municipal solid waste (MSW) is a major obstacle for the majority of municipalities in developing countries because of the impacts related to the landfilling of waste. Garbage is an energy-rich material. As a result, energy recovery is considered to be a sustainable waste management method. In Morocco, 7.4 million tons are produced annually; most of the waste is landfilled without any recovery despite the impacts related to this method of disposal. The objective of this chapter is to characterize combustible fractions (RDF) from household waste in Morocco and to study the economic and environmental benefits of their use as alternative fuels in cement kilns. The results of this research show that the combustible fractions contained in household waste in Morocco constitute a potential sustainable energy source with a high lower calorific value (4454 kcal/kg). The study of the advantages of co-incineration shows that the substitution of pet coke by 15% RDF reduces the pollution linked to gaseous emissions. In addition, the cement plant can make financial savings 389 USD/h by minimizing the use of fossil fuels.