Hierarchically Structured Calcium Silicate Hydrate-Based Nanocomposites Derived from Steel Slag for Highly Efficient Heavy Metal Removal from Wastewater

Shao, Ningning1; Tang, Siqi1; Liu, Ze2; Li, Li2; Yan, Feng3; Liu, Fei1; Li, Shun1; Zhang, Zuotai1,4

2018-11-05

10.1021/acssuschemeng.8b03428

ACS Sustainable Chemistry & Engineering   影响因子和分区

2168-0485

Calcium silicate hydrate (CSH) is a potential new material for effective heavy metal adsorption, but the high manufacturing costs and difficult reusability have restricted its large-scale application. Herein, we report a green and facile strategy to prepare amorphous and hierarchically structured CSH-based nanocomposites from steel slag for heavy metal removal. The obtained flowerlike CSH-based materials showed fast adsorption rates and superior adsorption capacities for all employed heavy metal ions (Cu(II), Pb(II), and Zn(II)), with maximum adsorption capacities of approximately 244, 273, and 508 mg/g, respectively. The adsorption kinetics were all well fitted to the pseudo-second order model, and the adsorption equilibrium fitted the Langmuir model. The excellent adsorption performance could be attributed to the release of Ca2+ and OH- from the CSH nanosheets. Moreover, as a case study, the obtained CSH-Cu(II) after absorption can be converted and reused as an photocatalyst by simply heating at 300 degrees C, which shows an excellent degradation efficiency of similar to 90% for methylene blue within 150 min under simulated sunlight irradiation. This work lays the foundation for the development of an environmentally friendly route of "solid waste -> adsorbent -> catalyst", which will be of great significance for solid waste utilization as well as water purification.

Calcium silicate hydrate Steel slag Heavy metal adsorption Reusability Photocatalyst

SCI ; EI

英语

第一 ; 通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Chemistry ; Science & Technology - Other Topics ; Engineering

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical

WOS:000449577200143

AMER CHEMICAL SOC

20183905857628

Adsorption ; Aromatic compounds ; Calcium silicate ; Copper compounds ; Degradation ; Dyes ; Heavy metals ; Hydrates ; Hydration ; Irradiation ; Lead compounds ; Metal ions ; Nanocomposites ; Photocatalysts ; Purification ; Reusability ; Silicate minerals ; Slags ; Solid wastes ; Zinc compounds

Minerals:482.2 ; Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Heat Treatment Processes:537.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Solid State Physics:933

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China
2.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Ding 11,Xueyuan Rd, Beijing 100083, Peoples R China
3.Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China
4.Key Lab Municipal Solid Waste Recycling Technol &, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Shao, Ningning,Tang, Siqi,Liu, Ze,et al. Hierarchically Structured Calcium Silicate Hydrate-Based Nanocomposites Derived from Steel Slag for Highly Efficient Heavy Metal Removal from Wastewater[J]. ACS Sustainable Chemistry & Engineering,2018,6(11):14926-14935.

Shao, Ningning.,Tang, Siqi.,Liu, Ze.,Li, Li.,Yan, Feng.,...&Zhang, Zuotai.(2018).Hierarchically Structured Calcium Silicate Hydrate-Based Nanocomposites Derived from Steel Slag for Highly Efficient Heavy Metal Removal from Wastewater.ACS Sustainable Chemistry & Engineering,6(11),14926-14935.

Shao, Ningning,et al."Hierarchically Structured Calcium Silicate Hydrate-Based Nanocomposites Derived from Steel Slag for Highly Efficient Heavy Metal Removal from Wastewater".ACS Sustainable Chemistry & Engineering 6.11(2018):14926-14935.