Narsito Narsito
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO BOX BLS 21 Yogyakarta 55281

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Journal : Jurnal Manusia dan Lingkungan

PROSES SOL-GEL DALAM PEMBUATAN HIBRIDA MERKAPTO-SILIKA UNTUK ADSORPSI ION CU (II) DALAM LARUTAN Buhani, Buhani; Narsito, Narsito; Nuryono, Nuryono; Kunarti, Eko Sri
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 19, No 3 (2012)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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INTEGRATED WATER MONITORING TO SUPPORT THE MANAGEMENT OF HEALTHY SEGARA ANAKAN ESTUARY Noegrahati, Sri; Narsito, Narsito
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 14, No 1 (2007)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Estuaries provide vital nesting and feeding habitats for many aquatic plants and animals, therefore suitable methods are needed for monitoring the changes in estuarine waters to keep the health of coastal habitats. Limitations in understanding the relationship between discrete physicochemical measurements and cause of the alteration in the quality and functioning of an ecosystem, has lead to the integration of physicochemical and biological monitoring. In this work, spatial time series integrated monitoring of Southern part of Segara Anakan Estuary, Central Java, Indonesia, was carried out from August 2003 to May 2004. The parameters were measured at the lowest water depth. Dramatic changes in physicochemical parameters of salinity, total suspended solids, turbidity and biological parameters of phytoplankton diversity, density was observed during dry season (August-September 2003) and wet season (December 2003-March 2004), while the changes in parameters of organics (DO, BOD and COD) and nutrients (N-NH3 N-NO and P) were not significant. The difference of freshwater influx into the estuary caused higher salinity in dry season (25 to 2 ppt) and faster water velocity in wet season (0,4 to 0,2 m/detik). The higher rainfall and faster water velocity in wet season caused more re-aeration via the water surface, therefore, photosynthetic production, measured as increase rate of DO in day time, could be assessed only in dry season. Limitation of phytoplankton ability to carry out photosynthesis in wet season, as observed by the decrease of the daytime CO consumption rate, were due to the drastic increase of turbidity (0,8 to 14,1 NTU) caused by total suspended solids transported with the freshwater influx. In other turn, this limitation caused the decrease of phytoplankton diversity and density. Considering that healthy estuaries are critical for the continued survival of many species of fish and other aquatic life, and phytoplankton forms the base of the aquatic food web, it is recommended to prevent excessive solids entrance into Segara Anakan estuary from the surrounding water catchments area.
ADSORPSI ION LOGAM Zn (II) DAN Cu(II) PADA KITOSAN NANO BEAD DARI CANGKANG UDANG WINDU(Penaus monodon) Cahyaningrum, Sari Edi; Narsito, Narsito; Santoso, Sri Juari; Agustini, Rudiana
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 18, No 3 (2011)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Telah dibuat dua macam adsorben kitosan serbuk dan kitosan bead dari cangkang udang windu (Penaus monodon) sebagai bahan dasar, untuk adsorpsi ion logam Zn(II) dan Cu(II). Beberapa parameter adsorpsi seperti pH, laju adsorpsi, dan kapasitas adsorpsi dipelajari. Model kinetika adsorpsi orde satu dan orde 2 digunakan sebagai dasar untuk mengestimasi laju adsorpsi, sedangkan model isoterm adsorpsi Langmuir dan Freundlich digunakan untuk menetapkan kapasitas adsorpsi. Hasil penelitian menunjukkan bahwa adsorpsi ion logam Zn(II) dan Cu(II) pada kitosan serbuk dan kitosan bead mempunyai pH optimum yang sama. Laju adsorpsi ion logam Zn(II) dan Cu(II) pada kitosan bead secara signifikan lebih cepat dibanding pada kitosan serbuk. Modifikasi adsorben dengan proses swelling dapat meningkatkan kapasitas adsorpsi ion logam Zn(II) dan Cu(II) pada kitosan.
ADSORPTION OF ZrNK(rr) METAL ION ON CHITOSAN BEAD FROM SHELL SHRIMP (Penaus monodon) Cahyaningrum, Sari Edi; Narsito, Narsito; Santoso, Sri Juari; Agustini, Rudiana
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 15, No 2 (2008)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Telah dibuat dua macam adsorben kitosan dan bead kitosan dari cangkang udang windu (Penaus monodon) sebagai bahan dasar untuk adsorpsi ion logam Zn(Il). Adsorben kitosan dibuat melalui deproteinasi, demineralisasi diikuti deasetilasi, sedangkan bead kitosan merupakan hasil penggembungan terhadap kitosan. Beberapa parameter adsorpsi seperti pH, laju adsorpsi, dan kapasitas adsorpsi ion logam Zn(ll) dipelajari. Penelitian ini diawali dengan identifikasi secara spektroskopi infra merah terhadap gugus fungsional adsorben yang diperkirakan berfungsi sebagai situs aktif adsorpsi. Model kinetika adsorpsi orde satu yang mendekati kesetimbangan digunakan sebagai dasar untuk mengestimasi laju adsorpsi, sedangkan model isoterm adsorpsi Langmuir digunakan untuk menetapkan kapasitas adsorpsi. Hasil penelitian menunjukkan bahwa adsorpsi ion logam Zn(ll) pada kitosan serbuk dan bead kitosan mempunyai pH optimum yang sama. Laju adsorpsi ion logam Zn(II) pada bead kitosan secara signifikan lebih cepat dibanding pada kitosan. Proses swelling meningkatkan kapasitas adsorpsi ion logam Zn(ll) pada kitosan.