Enhancing cation and anion exchange capacity of rice straw biochar by chemical modification for increased plant nutrient retention.

Autor: Dey S; Division of Soil Science and Agricultural Chemistry, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India., Purakayastha TJ; Division of Soil Science and Agricultural Chemistry, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India. Electronic address: tpurakayastha@gmail.com., Sarkar B; Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia., Rinklebe J; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany., Kumar S; Division of Soil Science and Agricultural Chemistry, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India., Chakraborty R; Division of Soil Science and Agricultural Chemistry, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India., Datta A; Division of Design of Experiments, Indian Council of Agricultural Research-Indian Agricultural Statistics Research Institute, New Delhi 110012, India., Lal K; Division of Water Technology Center, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India., Shivay YS; Division of Agronomy, Indian Council of Agricultural Research-Indian Agricultural Research Institute, New Delhi 110012, India.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Aug 15; Vol. 886, pp. 163681. Date of Electronic Publication: 2023 Apr 25.
DOI: 10.1016/j.scitotenv.2023.163681
Abstrakt: Biochar, a potential alternative of infield crop residue burning, can prevent nutrient leaching from soil and augment soil fertility. However, pristine biochar contains low cation (CEC) and anion (AEC) exchange capacity. This study developed fourteen engineered biochar by treating a rice straw biochar (RBC-W) first separately with different CEC and AEC enhancing chemicals, and then with their combined treatments to increase CEC and AEC in the novel biochar composites. Following a screening experiment, promising engineered biochar, namely RBC-W treated with O 3 -HCl-FeCl 3 (RBC-O-Cl), H 2 SO 4 -HNO 3 -HCl-FeCl 3 (RBC-A-Cl), and NaOH-Fe(NO 3 ) 3 (RBC-OH-Fe), underwent physicochemical characterization and soil leaching-cum nutrient retention studies. RBC-O-Cl, RBC-A-Cl, and RBC-OH-Fe recorded a spectacular rise in CEC and AEC over RBC-W. All the engineered biochar remarkably reduced the leaching of NH 4 + -N, NO 3 - -N, PO 4 3- -P and K + from a sandy loam soil and increased retention of these nutrients. RBC-O-Cl at 4.46 g kg -1 dosage emerged as the most effective soil amendment increasing the retention of above ions by 33.7, 27.8, 15.0, and 5.74 % over a comparable dose of RBC-W. The engineered biochar could thus enhance plants' nutrient use efficiency and reduce the use of costly chemical fertilizers that are harmful to environmental quality.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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