In the current study, MIL-101(Cr)-SO3H[HCl] as metal-organic frameworks (MOFs) was fabricated via a hydrothermal method. The physicochemical properties of the synthesized material were characterized using XRD, FT-IR, FE-SEM, TEM, and BET surface area analysis. The XRD diffraction pattern of the prepared MIL-101(Cr)-SO3H[HCl] was similar to previously reported patterns of MIL-101(Cr) type materials, indicating successful synthesis of MIL-101(Cr)-SO3H[HCl]. The FT-IR spectrum revealed the molecular structure and functional groups of the synthesized MIL-101(Cr)-SO3H[HCl]. FE-SEM and TEM images indicated the formation of rectangular parallelopiped structures in the prepared MIL-101(Cr)-SO3H[HCl]. Furthermore, the EDS spectrum showed that the synthesized material consisted of the elements of Cr, O, S, and C. The fabricated MIL-101(Cr)-SO3H[HCl] was then employed as an adsorbent for the removal of Sr2+ and Cs+ from aqueous solutions. The adsorption kinetics and adsorption isotherm models were studied in detail. The maximum adsorption capacities of MIL-101(Cr)-SO3H[HCl] for Sr2+ and Cs+ according to pH (3, 5.3∼5.8, 10) were 35.05, 43.35, and 79.72 mg/g and 78.58, 74.58, and 169.74 mg/g, respectively. These results demonstrate the potential of the synthesized MOFs, which can be effectively applied as an adsorbent for the removal of Sr2+ and Cs+ ions from aqueous solutions and other diverse applications.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. MOFs 소재 합성
    2.2. 합성소재 물성 분석
    2.3. 스트론튬(Sr2+) 및 세슘(Cs+) 이온 흡착
3. 결과 및 고찰
    3.1. 합성소재 물성
    3.2. 시간에 따른 흡착능 및 흡착속도
    3.3. pH 변화에 따른 등온흡착 결과
    3.4. 흡착 후 소재 물성
4. 결 론
REFERENCES

• 이준엽((주)시드파트원) | Joon Yeob Lee (SEEDPARTONE Inc.)
• 최정학(부산가톨릭대학교 환경공학과) | Jeong-Hak Choi (Department of Environmental Engineering, Catholic University of Pusan) Corresponding author