Investigation of the kinetics and mechanisms of nickel and copper ions adsorption from aqueous solutions by date seed derived biochar

Abstract

Highlights:  Date seed biochars adsorption capacity Cu 2+ and Ni 2+ were investigated  Biochar with particle size 0.6-1.4 mm and prepared at 550 o C and 3 h was best  Ion exchange mechanism accounted for 70% of the ion removal  Cu 2+ and Ni 2+ adsorption was spontaneous an endothermic process

Biochar-augmented biofilters to improve pollutant removal from stormwater – can they improve receiving water quality?

“…Biochar particle size also appears to play an important role in media performance with respect to contaminant removal. Several studies have found that including smaller biochar particle sizes can achieve improved contaminant removal, including bacteria (i.e., E. coli), 63 as well as dissolved contaminants such as heavy metals 90,91 and organics. 92,93 The particle size dependence of dissolved contaminant removal can be attributed to reduced intraparticle kinetic diffusion limitations, 61,91 as diffusion paths to internal sorption sites are shorter for smaller particle sizes.…”

Adsorption in a binary system of Pb (II) and Ni (II) using lemon peels

“…In the same way, the formation of micro-complexes and micro-precipitations on the surface of the lemon peel could take place [30]. The increase in the atomic percentage of Ca and K after Ni (II) adsorption shows that these elements precipitate in calcium and potassium phosphate and phosphate forms on the surface of the biomaterial, which is seen in the white particles in SEM micrographs [33], [34].…”

Assessing the capacity of biochar to stabilize copper and lead in contaminated sediments using chemical and extraction methods

“…The results demonstrate that the Langmuir model is suitable to explain the sorption behaviour of Cu and Pb onto SBIO, and the adsorption capacity (Q max , Langmuir model) for Pb (635.7 mg/g) is much higher than for Cu (52.8 mg/g) at a given temperature. Sludge 31 Shell 45 (Elaigwu et al, 2014) Cow manure 230 (Kołodyńska et al, 2012) Dairy manure 140 (Cao et al, 2009) Sugar cane 87 (Abdelhafez and Li, 2016) Orange peel 28 (Abdelhafez and Li, 2016) Pinewood 4 (Liu and Zhang, 2009) Begass 135 (Inyang et al, 2011) Peanut shells 350 (Guocheng, 2014) Rraditional Chinese medicine waste 400 (Guocheng, 2014) Peanut straw 50 (Tong et al, 2011b) Soybean straw 33 (Tong et al, 2011b) Seed 27 (Mahdi et al, 2018) Spartina alterniflora 48 (Li et al, 2013) Cow manure 54 (Xu et al, 2013) Pinewood 4 (Liu et al, 2010) Pinewood 3 (Liu et al, 2010) Raw farmyard manure 39 (Batool et al, 2017) poultry manure 43 (Batool et al, 2017) Sawdust 655 55 In this study The C DGT can be measured from the following equation:…”