Executive Summary : | Unsafe drinking water and poor sanitation are two main culprits for affecting human health (e.g. water-borne diseases). Continuous addition of heavy metals and inorganic anions (e.g. lead, arsenic, fluoride, nitrate, phosphate etc) into the water from varying sources can make it unfit for drinking purpose (Dewage et al., 2018). Leachate generated from the Open solid waste land fill sites is major sources of toxic elements addition in the water and soil as well (CPCB, 2015; Paul et al., 2019). Further, this problem is observed more in the developing countries as their waste management practices are not sufficient (Abdel-Shafy and Mansour, 2018). Population explosion and unplanned fast urbanization are the major contributors of generating huge quantity of municipal solid wastes (MSW) especially in the towns and cities (Kurakalva et al., 2016; Yousefloo and Babazadeh, 2019). Many human health problems can occur due to the exposure of toxic elements (for e.g. As, Cd, Cr, Pb, Hg, Se etc) which may generally present in the leachate generated from the solid waste dumping sites (Xiong et al., 2019). Adsorption is considered a better water treatment option because of convenience, ease of operation and simplicity of design. Biochar is a renewable, sustainable, recyclable, cost effective and potent adsorbent to remove various types of contaminants including dyes, heavy metals from the aqueous solutions (Peiris et al., 2017, Vikrant et al., 2017) which also regarded as "green carbon" as it is produced by thermal treatment of naturally available ample biomass such as wood, plant residues etc (Ghaffar et al., 2017). During present works, a biochar-based-bricks wall will be developed which can adsorb the toxic metals present in the leachate. |