Soil acidification and the liming potential of biochar

Bolan, Nanthi; Sarmah, Ajit K.; Bordoloi, Sanandam; Bolan, Shankar; Padhye, Lokesh P.; Zwieten, Lukas Van; Sooriyakumar, Prasanthi; Khan, Basit Ahmed; Ahmad, Muzamil; Solaiman, Zakaria M.; Rinklebe, Jeorg; Wang, Hailong; Singh, Bhupinder; Siddique, Kadambot H.M.

doi:10.1016/j.envpol.2022.120632

Cited by 103 publications

(33 citation statements)

References 160 publications

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“…The effect of application of liming materials on leaf Cd concentration of cacao plants was studied at the greenhouse scale as shown in Figure . Leaf Cd concentration has been commonly used as a proxy to assess bean Cd concentration. ,, Liming is commonly considered as a viable strategy to reduce cadmium uptake by crops due to the increase in soil pH and the expected reduction in bioavailable Cd. , Herein, even though all the liming materials had a significant effect in increasing the surface soil pH, the uptake of Cd increased for all the Ca-containing liming materials (DL, CL, and SL), as seen in Figure . However, for MS, which does not contain Ca (see Table S1), the leaf Cd concentration decreased compared with the control.…”

Section: Resultsmentioning

confidence: 97%

“…Reduction of Cd migration to edible plants can be achieved through agronomic practices by either (i) decreasing soil Cd contamination or (ii) by reducing Cd bioavailability to plants . Since the latter is highly dependent on soil pH, liming is commonly used to reduce cadmium uptake by crops. , Although this is an agronomic practice primarily aimed to ameliorate soil acidity, it is increasingly used for remediation of soils contaminated with potentially toxic elements. , …”

Section: Introductionmentioning

confidence: 99%

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

López,

Builes,

Gil

et al. 2023

ACS Agric. Sci. Technol.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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

López,

Builes,

Gil

et al. 2023

ACS Agric. Sci. Technol.

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“…in the form of oxides, phosphates, carbonates and silicates [ 18 ]. Such properties facilitate its use in agriculture as a liming agent and an amendment abundant in some macro- and micronutrients, especially in the case of sludge and animal-derived biochars [ 20 , 21 , 22 , 23 ]. In contrast, high-temperature (>500 °C) plant-derived biochars are more commonly used to mitigate soil contamination via immobilization of heavy metals and organic pollutants [ 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Deashed Wheat-Straw Biochar as a Potential Superabsorbent for Pesticides

et al. 2023

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Biochar activation methods have attracted extensive attention due to their great role in improving sorptive properties of carbon-based materials. As a result, chemically modified biochars gained application potential in the purification of soil and water from xenobiotics. This paper describes changes in selected physicochemical properties of high-temperature wheat-straw biochar (BC) upon its deashing. On the pristine and chemically activated biochar (BCd) retention of five pesticides of endocrine disrupting activity (carbaryl, carbofuran, 2,4-D, MCPA and metolachlor) was studied. Deashing resulted in increased sorbent aromaticity and abundance in surface hydroxyl groups. BCd exhibited more developed meso- and microporosity and nearly triple the surface area of BC. Hydrophobic pesticides (metolachlor and carbamates) displayed comparably high (88–98%) and irreversible adsorption on both BCs, due to the pore filling, whereas the hydrophilic and ionic phenoxyacetic acids were weakly and reversibly sorbed on BC (7.3 and 39% of 2,4-D and MCPA dose introduced). Their removal from solution and hence retention on the deashed biochar was nearly total, due to the increased sorbent surface area and interactions of the agrochemicals with unclogged OH groups. The modified biochar has the potential to serve as a superabsorbent, immobilizing organic pollutant of diverse hydrophobicity from water and soil solution.

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“…Lime is used to clean exhaust gas and wastewater in the realm of environmental protection. 4 CaO is the primary ingredient of lime. In traditional industries, lime is primarily produced by calcining limestone at temperatures of 800-1100 °C.…”

Section: Introductionmentioning

confidence: 99%

“…In agriculture, lime is also used as a soil conditioner to neutralize soil acidity and improve soil structure. Lime is used to clean exhaust gas and wastewater in the realm of environmental protection 4 . CaO is the primary ingredient of lime.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on preparation of calcium oxide by coal reduction of calcium sulfate in carbon dioxide atmosphere

Wang

2023

J of Chemical Tech & Biotech

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BACKGROUND: Recent studies show that CaO is being produced from CaSO 4 by CO reduction using fixed-bed reactors. However, the product yield is low and the reaction time is long. Furthermore, the high cost of CO hinders its application in industrial processes. Therefore, a new process is proposed for preparing CaO by CaSO 4 decomposition using lignite under CO 2 . The influence of various process conditions on the production of CaO by CaSO 4 decomposition is investigated by combining kinetic and FactSage simulations. Finally, a typical industrial gypsumphosphogypsum (PG)is used for experimental verification.RESULTS: The study found that adding CO 2 during the coal reduction of CaSO 4 increases the CaO yield. The ideal conditions are 1.75 C/Ca molar ratio, 7.5% CO 2 concentration at 1100 °C with the maximum CaSO 4 decomposition rate and CaO yield of 99.63% and 99.28%, respectively. CaO generation is carried out using a two-step process. Initially, CaSO 4 is reduced to become CaS and CaO, and CaS interacts with CaSO 4 to produce CaO. Secondly, the reaction between CaS and CO 2 produces CaO. The nucleation and growth model with g(⊍) = −ln(1 − ⊍) is applicable to both processes. The experimental use of PG confirms the above conclusions, but SiO 2 in PG reacts with CaO to produce Ca 2 SiO 4 and affect the CaO yield.CONCLUSION: The addition of CO 2 promotes the conversion process of CaSO 4 to CaO. Increasing the temperature, C/Ca molar ratio and CO 2 concentration favor the decomposition of CaSO 4 into CaO. This study offers advice for using CaSO 4 products like PG as resources.

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Soil acidification and the liming potential of biochar

Cited by 103 publications

References 160 publications

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

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

Deashed Wheat-Straw Biochar as a Potential Superabsorbent for Pesticides

Experimental study on preparation of calcium oxide by coal reduction of calcium sulfate in carbon dioxide atmosphere

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