Biochar had effects on phosphorus sorption and desorption in three soils with differing acidity

Using Magnetized (Fe3O4 / Biochar Nanocomposites) and Activated Biochar as Adsorbents to Remove Two Neuro-Active Pesticides from Waters

“…The supernatants were removed and filtered using 0.45 μm syringe filters, and then analyzed to determine the amounts of the pesticides adsorbed by the biochars. Using a method adapted from Xu et al, 23 the pesticides were desorbed from the biochars in two different ways. In the first procedure, 10 mL aliquots of 1:10 (v/v) acetonitrile/water mixture were added to the tubes containing the biochar residues, while the second method employed 10 mL aliquots of water heated at 50 °C.…”

Phosphorus uptake and availability and short-term seedling growth in three Ontario soils amended with ash and biochar

“…Biochar and ash effects on P availability can also vary widely depending on the soil texture and the dominant plant species. Acidic soils typically have stronger responses to biochar than alkaline soils (Cui et al 2011;Biederman and Harpole 2013;Xu et al 2014) and ash amendment effects on P availability are strongest in P-limited soils (Wallander et al 2005). However, despite this variability, few studies have systematically compared effects in different soils planted with different species under the same amendment and growth conditions.…”

“…Biochar and wood ash are soil amendments that have the potential to increase plant-available P, both by raising the pH of acidic soils and by directly supplying P in the biochar or ash particles themselves (Augusto et al 2008;DeLuca et al 2009;Saarsalmi et al 2012;Biederman and Harpole 2013 , and Ca 2+ that complex with P in the soil solution, increasing P availability (Xu et al 2014). Biochar and ash can also affect the soil microbial community, which may indirectly increase soil P availability.…”

“…However, despite this variability, few studies have systematically compared effects in different soils planted with different species under the same amendment and growth conditions. For example, Xu et al (2014) compared P effects in three soils with varying rates of biochar addition, but did not incorporate a plant aspect and Erich and Ohno (1992) compared ash effects on P availability in eight different soils, but all were planted with corn seedlings. In addition, most previous biochar studies have occurred in agricultural soils; the nature of biochar in forest soils is relatively understudied, especially in terms of P provision.…”

Recovery of nutrients from biogas digestate with biochar and clinoptilolite

“…Biochar has been suggested as a sorbent for ammonium (TaghizadehToosi et al, 2012a;Hale et al, 2013;Gai et al, 2014;Carey et al, 2015;Cui et al, 2016), orthophosphate (Hollister et al, 2013;Sarkhot et al, 2013;Xu et al, 2014) and organic contaminants (Ahmad et al, 2014;Mohan et al, 2014;Wang et al, 2015b) removal from various wastewaters. Chemical activation of biochar has been shown to increase the oxygen-containing functional groups (Xue et al, 2012;Wang et al, 2015a) which affects the cation sorption on biochar, and orthophosphate removal due to cation bridge bonding (Lin et al, 2012;Qian et al, 2013).…”