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논문 기본 정보

자료유형
학술저널
저자정보
John Kabuba (Vaal University of Technology)
저널정보
한국분석과학회 분석과학 분석과학 제35권 제2호
발행연도
2022.4
수록면
41 - 52 (12page)

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초록· 키워드

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The leaching of nitrate from soil increases the concentration of elements, such as nitrogen, phosphorus, and potassium, in water, causing eutrophication. In this study, the feasibility of using clinoptilolite as an ion-exchange material to reduce nitrate leaching in soil was investigated. Soil samples were collected from three soil depths (0 - 30, 30 - 90, and 90 - 120 cm), and their sorption capacity was determined using batch experiments. The effects of contact time, initial concentration, adsorbent dosage, pH, and temperature on the removal of NO₃− were investigated. The results showed that an initial concentration of 25 mg L<SUP>−1</SUP>, a contact time of 120 min, an adsorbent dosage of 5.0 g/100 mL, a pH of 3, and a temperature of 30℃ are favorable conditions. The kinetic results corresponded well with a pseudo-second-order rate equation. Intra-particle diffusion also played a significant role in the initial stage of the adsorption process. Thermodynamic studies revealed that the adsorption process is spontaneous, random, and endothermic. The results suggest that a modification of clinoptilolite effectively reduces the leaching of nitrate in soil.

목차

Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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