Trong nghiên cứu này, vật liệu tổ hợp giữa các hydroxit kép phân lớp Mg/Al và zeolit tự nhiên (Mg/Al LDH-zeolit) đã được tổng hợp bằng phương pháp đồng kết tủa nhằm loại bỏ chất nhuộm màu Direct Black 22 (DB22) khỏi dung dịch nước. | TNU Journal of Science and Technology 226 11 259 - 267 ADSORPTION OF DIRECT BLACK 22 FROM AQUEOUS SOLUTION USING Mg Al LDH- ZEOLITE Nguyen The Duyen1 Van Huu Tap2 Do Thuy Tien1 Hoang Trung Kien2 Nguyen Dinh Vinh2 Nguyen Van Quang1 1Hanoi Pedagogical University 2 2TNU - University of Sciences ARTICLE INFO ABSTRACT Received 30 6 2021 In this study composite materials between Mg Al Layered Double Hydroxide and natural zeolite Mg Al LDH-zeolite were synthesized by co-precipitation Revised 27 8 2021 method to remove Direct Black 22 DB22 in aqueous solution. The Published 27 8 2021 characteristics of Mg Al LDH-zeolite were evaluated by scanning electron microscopy SEM energy dispersive X-ray spectrometry EDX Fourier KEYWORDS transform infrared spectra FTIR and Brunauer Emmett Teller BET surface area. The adsorption process of Mg Al LDH-zeolite for DB22 was evaluated Absorption through batch experiments to examine various parameters including solution Direct Black 22 pH contact time and initial DB22 concentration. The DB22 adsorption isotherm and kinetic data on Mg AlLDH-zeolite were analyzed. The results Layered Double show that DB22 could be removed well by using Mg Al LDH-zeolite due to its Hydroxide large surface area m g and functional groups. The DB22 adsorption Mg Al LDH-zeolite capacities of Mg Al LDH-zeolite reached mg g at an initial DB22 Zeolite concentration of 150 mg L pH 4 and contact time of 120 min. The adsorption isotherms of DB22 on Mg Al LDH-zeolite were described well by Langmuir models with high R2 values R2 gt . The obtained data also well matched the pseudo-second-order models with R2 values . Physisorption through electrostatic attraction and pore filling as the main adsorption mechanism. NGHIÊN CỨU XỬ LÝ CHẤT NHUỘM MÀU DIRECT BLACK 22 BẰNG VẬT LIỆU Mg Al LDH- ZEOLIT Nguyễn Thế Duyến1 Văn Hữu Tập2 Đỗ Thủy Tiên1 Hoàng Trung Kiên2 Nguyễn Đình Vinh2 Nguyễn Văn Quang1 1Trường Đại học Sư phạm Hà Nội 2 2Trường Đại học Khoa học - ĐH
