Abstract：
:As (III) is widely distributed in groundwater which is relatively harder to be removed comparing to As (V). Co-grinding Ca(OH)2 with Al(OH)3 was conducted to manufacture katoite (Ca3Al2(OH)12) for the complete removal of As(III) (concentration below drinking water standard of WHO (<10 ppb)) during one-step agitation operation. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), and X-ray photoelectron spectroscopy (XPS) were applied for the illustration of adsorption mechanism. Katoite could intercalate As(III) into the layered space forming arsenite pillared Ca-Al layered double hydroxide (LDH). The coexisting anions such as Cl-, SO42-, and NO3- had minor effects on As (III) removal performance using katoite. Techno-economic analysis demonstrated the feasibility of large-scale katoite production and its practical application for As(III) polluted groundwater purification, especially in the undeveloped areas where groundwater was used as irrigation and drinking water.
journal_name
Chemospherejournal_title
Chemosphereauthors
Sha L,Zou Z,Qu J,Li X,Huang Y,Wu C,Xu Zdoi
10.1016/j.chemosphere.2020.127555subject
Has Abstractpub_date
2020-12-01 00:00:00pages
127555eissn
0045-6535issn
1879-1298pii
S0045-6535(20)31750-1journal_volume
260pub_type
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