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SYNERGISTIC INTERFACIAL CHEMISTRY OF HUMIC ACID AND ACTIVATED FLY ASH FOR HIGH-PERFORMANCE Mn²⁺ ADSORPTION
Susparini, Ninik Triayu
; Ramadhan, Alamsyah Sultan
; Aferta, Lusi
; Benu, Marlon Jusak Renaldy
; Wijayanti, Sri
; Tantowi, Ali
Jurnal Inovasi Teknik Kimia
Vol 11
, No 1
(2025)
This study developed a hybrid adsorbent derived from activated fly ash (FA) and humic acid (HA) for effective Mn²⁺ removal from aqueous solutions. Fly ash was activated using 1 M NaOH to increase its surface hydroxyl groups (≡Si–OH and ≡Al–OH) and enhance reactivity. The activated FA was then composited with HA, which contains abundant –COOH and –OH groups, forming an inorganic–organic hybrid with improved adsorption capability. The HA–FA composite with a 1:3 mass ratio exhibited the highest Mn²...
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KONDISI EKSISTING USAHA MIKRO DAN KECIL KERAJINAN BAHAN ALAM DI KOTA SEMARANG DALAM BERTAHAN MENGHADAPI KRISIS AKIBAT PANDEMI
Fokus Ekonomi : Jurnal Ilmiah Ekonomi
Vol 15
, No 2
(2020)
The existing condition due to the crisis during the pandemic period requires micro and small enterprises, including natural handicrafts to survive. This research seeks to portray the situation in the field of adaptive efforts of micro and small enterprises crafting natural raw materials both before a pandemic, during a pandemic and new normal effort in an effort to survive this difficult situation. Research on 20 business actors using convenience sampling method. Micro and small enterprises that...
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