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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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Valuasi Ekonomi Wisata Pantai di Kabupaten Timor Tengah Selatan
Populer: Jurnal Penelitian Mahasiswa
Vol 4
, No 1
(2025)
Oetune Beach and Kolbano Beach are types of natural tourism in South Central Timor Regency that have potential resources in the form of uniqueness and natural beauty. This study aims to identify factors that influence visitor demand using linear regression analysis and determine the economic value of the two attractions based on individual travel cost analysis (Individual Travel Cost Method/ITCM). Sampling was done using non probability sampling method form of accidental sampling technique on 12...
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Valuasi Ekologi dan Ekonomi Sumber Air Bonleu Kabupaten Timor Tengah Selatan dengan Metode Willingness to Accept
Populer: Jurnal Penelitian Mahasiswa
Vol 3
, No 4
(2024)
This study is a quantitative research that aims to analyze and determine the ecological and economic valuation value of Bonleu water resources in South Central Timor district using the willingnes to accept method. This study is located in a place that uses primary data and secondary data collected using questionnaire methods, observation interviews and focus discussion groups and this study uses data analysis techniques in the form of descriptive statistical analysis methods and continuous valua...
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