Synthesis of geopolymer-supported zeolites via robust one-step method and their adsorption potential

被引：96

作者：

Khalid, Hammad R. ^{[1
]}

Lee, N. K. ^{[2
]}

Park, S. M. ^{[1
]}

Abbas, N. ^{[3
]}

Lee, H. K. ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, 291 Daehak Ro, Daejeon 34141, South Korea

[2] Korea Inst Civil Engn & Bldg Technol, 283 Goyangdae Ro, Goyang Si 10223, South Korea

[3] Univ Hail, Dept Chem Engn, Hail, Saudi Arabia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2018年 / 353卷

基金：

新加坡国家研究基金会;

关键词：

Geopolymer-supported zeolite; Hydrothermal treatment; Mesoporous adsorbent; Zeolite Na-P1; Lead; ALKALI-ACTIVATED SLAG; BLAST-FURNACE SLAG; ASH-BASED GEOPOLYMER; COAL FLY-ASH; HEAVY-METAL ADSORPTION; PAPER SLUDGE ASH; MESOPOROUS GEOPOLYMERS; HYDROTHERMAL SYNTHESIS; CEMENTITIOUS MATERIALS; AQUEOUS-SOLUTIONS;

D O I：

10.1016/j.jhazmat.2018.04.049

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present study proposes a robust one-step hydrothermal treatment method for synthesis of high strength geopolymer-supported zeolites utilizing industrial by-products (fly ash and blast furnace slag), which can be potentially used as bulk-type solid adsorbents. The results revealed that the geopolymer-supported zeolites, possessing distinct strengths, zeolite phases (Na-P1, Na-chabazite, and analcime) and pore features depending on the mix design and synthesis conditions, can be easily synthesized employing the proposed one-step method. The geopolymer-supported zeolites exhibited the characteristics of mesoporous materials which are typically desired for commercial adsorbents. The maximum adsorption capacity for Pb2+ was found to be about 37.9 mg/g which is relatively higher than the other bulk-type adsorbents reported for Pb2+ to date. Since industrial by-products are used for synthesis of these materials, it will help in reducing the environmental hazards associated with the permanent disposal of such by-products, with an added advantage that these bulk-type solid adsorbents can be easily retrieved after use unlike granular adsorbents.

引用

页码：522 / 533

页数：12

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