CHARACTERISTIC OF XONOTLITE SYNTHESIZED BY HYDROTHERMAL REACTION USING RICE HUSK ASH AND ITS APPLICATION TO ABSORB CHROME (III) SOLUTION | Zendy

Trung Kien Pham | Zendy; Tran Ngo Quan | Zendy

Open Access

CHARACTERISTIC OF XONOTLITE SYNTHESIZED BY HYDROTHERMAL REACTION USING RICE HUSK ASH AND ITS APPLICATION TO ABSORB CHROME (III) SOLUTION

Author(s) -

Trung Kien Pham,

Tran Ngo Quan

Publication year - 2021

Publication title -

materiali in tehnologije

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.27

H-Index - 25

eISSN - 1580-3414

pISSN - 1580-2949

DOI - 10.17222/mit.2021.233

Subject(s) - husk , materials science , hydrothermal circulation , scanning electron microscope , nuclear chemistry , chromium , adsorption , chemical engineering , mineralogy , metallurgy , chemistry , composite material , botany , organic chemistry , engineering , biology

In this paper, we report on synthesizing xonotlite, calcium silicate hydrate (CSH), via a hydrothermal reaction using rice husk from the Mekong Delta, Vietnam. The rice husks were burnt at 1000 °C for 3 h. Grey rice husk ash was collected, then mixed with Ca(OH)2 at a Ca/Si molar ratio of 1 : 1. This was followed by a hydrothermal reaction at 180 °C for 24 h and 48 h to obtain the xonotlite mineral. Before and after adsorption, 3-mm xonotlite pellets were thoroughly characterized using X-ray diffractometry (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and ultraviolet-visible (UV-VIS) spectroscopy. This material has potential application in chromium(III) removal during a chrome-plating process. The adsorption efficiency of the 3-mm pellet samples reached more than 76 % after 12 h.

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