Abstract
-FeOOH and -FeOOH nanoparticle adsorbents for As(V) and As(III) removal were evident from the XRD diagrams, where the oxides appeared in the form -FeOOH and -FeOOH. The SEM image of the prepared samples revealed that the nanoparticles diameter was about 30 nm. The maximum adsorption capacities of -FeOOH for As(V) and As(III) were 77.28 and 78.65 mg/g; and -FeOOH were 63.75 and 88.99 mg/g, respectively. After 15 min, about 97–98% of initial As (III) and As(V) concentration (0.05mg/L) was removed from the solution using 1000 mg/L adsorbent. -FeOOH and -FeOOH nano particles became a promising adsorbent for the removal of As(V) and As(III) from groundwater.
Highlights
Nguy n ình TrungTóm t t— -FeOOH và -FeOOH d ng nano dùng làm v t li u h p ph và lo i b As(V) và As(III) kh i dung d ch n c, t ph XRD và nh ch p SEM ã xác nh c các d ng -FeOOH và
removal were evident from the XRD diagrams
where the oxides appeared in the form -FeOOH
Summary
Tóm t t— -FeOOH và -FeOOH d ng nano dùng làm v t li u h p ph và lo i b As(V) và As(III) kh i dung d ch n c, t ph XRD và nh ch p SEM ã xác nh c các d ng -FeOOH và. I u ch –FeOOH: Hòa tan 3g FeCl2 4H2O trong 300ml n c c t (l c qua gi ylcnu có k t t a) sau ó thêm vào bình ph n ng 33ml dung d ch NaHCO3 1N, pH 7,5 trong h ph n ng c duy trì trong su t quá trình v a s c khí v i t c dòng 2L /phút, v a khu y t c 1200 vòng/phút nhi t ph n ng 25 , ph n ng k t thúc sau 30 phút k t t a màu xanh en chuy n thành màu vàng l t, ly tâm 10 phút t c 10000 vòng/phút, rasysn ph m –FeOOH) dùng cho nghiên c u ti p theo. Cs cho vào bình nh m c 10ml sau ó cho thêm vào 1ml dung d ch chu n v i n ng 0,01 mg/L, l c u, ti n hành o theo TCVN 6626:2000
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