Assessment of the application of two amendments (lime and biochar) on the acidification and bioavailability of Ni in a Ni-contaminated agricultural soils of northern Colombia

Response of Soil Microbial Community (Bacteria and Fungi) to Organic and Inorganic Amendments Using Tomato as a Test Crop

“…The application of amendments significantly reduced the exchangeable acidity of the soil. This result is in line with the findings of Becerra-Agudelo et al (2022), and Onwuka et al (2016). An increase in soil phosphorus content was supported by the reports of Adeleye et al (2010), and Adekiya et al (2020).…”

Effects of Different Liming Materials on the Uptake of Cadmium and Mineral Nutrients in Cacao Plants

“…29 Total N was determined using a Kjeldahl method (UDK 139, VELP Scientifica) according to Colombian standard NTC 370, 30 and P was extracted using a Bray II method and estimated using a spectrophotometer (Genesys 10S, Thermo Scientific) according to Colombian standard NTC 234. 31 Exchangeable acidity was measured using extraction with KCl 1 M and titration with NaOH 0.1 N. 32 The CEC was quantified using the 1 N NH 4 OAc method at pH 7.0 according to Colombian standard NTC 5268. 33 Exchangeable Ca 2+ , Mg 2+ , K + , and Na + were extracted with a 1 M NH 4 OAc solution and subsequently quantified using atomic absorption spectroscopy (AA) (Sens AA, GBC scientific equipment, Australia).…”

Phosphorus-Loaded Biochar-Assisted Phytoremediation to Immobilize Cadmium, Chromium, and Lead in Soils

“…The waste produced in the coffee industry is 5 million tons/year between pulp, husks, and stalks, , while the waste generated in the sugar cane industry in the case of leaves is estimated at 9 million tons/year . Utilizing this waste via pyrolysis to produce biochar with suitable physical and chemical attributes for enhancing and rehabilitating soils, including the HM containment, significantly bolsters the circular economy and environmental sustainability. ,, …”

“…44 Utilizing this waste via pyrolysis to produce biochar with suitable physical and chemical attributes for enhancing and rehabilitating soils, including the HM containment, significantly bolsters the circular economy and environmental sustainability. 25,32,33 In order to better understand the behavior of the combination of amendments in phytoremediation processes involving L. perenne for metals, such as Cr, Cd, and Pb, the removal efficiencies of two types of biochar from two different biomasses (coffee and sugar cane leaves) have been assessed. The aim was to evaluate, on a laboratory scale, the phytoremediation of different soils contaminated with Cd, Cr, and Pb using L. perenne assisted with a slow-release amendment of P-loaded biochar.…”

“…Biochar has unique chemical and physical properties such as being pH neutral or alkaline, great surface area for the sorption of most metals, the presence of ash, a higher carbon content, and the ability to immobilize toxic heavy metals. Therefore, it can be successfully used as an immobilizer for various HMs. − The high alkalinity and pH of biochar could be the cause of the reduced bioavailability of metals and is associated with the increased rate of precipitation in the soil when modified by the biochar process. , Previously, it was used to improve the physical, chemical, and biological properties of soil to enhance crop production . Combining biochar with a phytoremediation method can significantly increase the effectiveness of HM remediation by improving biomass production and plant growth by 10%.…”