Claim Missing Document
Check
Articles

Found 26 Documents
Search

Adsorption and Regeneration of Indonesian Natural Pumice for Total Chromium Removal from Aqueous Solution Indah, Shinta; Helard, Denny; Marchelly, Fitria; Putri, Dean Eka
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 2 (2018): June
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.339 KB) | DOI: 10.26554/ijems.2018.2.2.30-37

Abstract

To investigate the potential of adsorption and regeneration of natural pumice from West Sumatera Indonesia for total chromium (Cr) removal from aqueous solution, batch experiments in multiple adsorption-desorption cycles were performed. The results indicated that the optimum condition of total Cr removal were 3 of pH solution, 0.3 g/L of adsorbent dose, 60 min of contact time of adsorption, <63 ?m of diameter of adsorbent, and 1 mg/L of total Cr initial concentration with 2.226 mg Cr/g pumice of total Cr uptake. The experimental data obtained were fitted with the Freundlich adsorption isotherm within the concentration range studied. Desorption efficiencies for total Cr ions by using 0.1 M HCl as desorbing agent were in the range of 31-32%. Although complete desorption were not attained, the natural pumice could be sufficiently reused up to 3 cycles of adsorption- desorption with increasing trend in total Cr uptake that may due to the surface modification of natural pumice caused by HCl. Overall results revealed that easy availability of natural pumice as local mineral in West Sumatra, Indonesia and its ability to adsorb and retain total Cr will create more interest to develop new natural adsorption method of pollutant removal from solution
The Adsorption and Regeneration of Natural Pumice as Low-Cost Adsorbent for Nitrate Removal From Water Helard, Denny; Indah, Shinta; Sari, Chintia Maya; Mariesta, Hestia
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 2 (2018): JGEET Vol 03 No 02 : June (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1044.886 KB) | DOI: 10.24273/jgeet.2018.3.2.1545

Abstract

The potential of adsorption and regeneration of Indonesian natural pumice to remove nitrate from aqueous solution was studied in multiple adsorption-desorption cycles. Batch experiments were performed to examine the effect of various experimental parameters on the removal of nitrate. The optimum condition of nitrate removal by natural pumice were obtained at 3 of pH solution, 0.3 g/L of adsorbent dose, 30 min of contact time, &lt;63 μm of particle size, and 90 mg/L of nitrate concentration with 54.79% of removal efficiency and 164.37 mg/g of nitrate uptake. The experimental data obtained were fitted with the Freundlich adsorption isotherm within the concentration range studied. Although complete desorption were not achieved, the result confirmed that HCl can be used as desorbing and recovery agent, which be desorbed 10-13% of nitrate ion. The used natural pumice also could be regenerated and reused up to three successive adsorption-desorption cycles. Overall results revealed that the ability of natural pumice to adsorb nitrate will create more interest to develop a new adsorbent from local mineral for pollutant removal from water
Penerapan Kolom Adsorpsi Seri dengan Adsorben Sekam Padi pada Penyisihan Logam Seng (Zn) dari Air Tanah Indah, Shinta; Helard, Denny; Ramadhan, Dian
Jurnal Riset Kimia Vol 12, No 1 (2021): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i1.389

Abstract

To increase the performance of continuous adsorption with rice husks as adsorbent in Zn removal from groundwater, a series of fixed bed column was applied. The experiments were carried out at the acrylic columns having diameter of 7 cm, column height of 19.5 cm, bed height of 13.5 cm and flow rate of 2 gpm/ft2 (310 mL/minute) for 540 minutes. The number of columns used were 3 columns arranged in series and the rice husk used were in their original size (1-2 mm). The influent concentration of Zn metal was 7.62 mg/L. The results showed that the use of column adsorption in series increased the removal efficiency of Zn by rice husks, from 33.21% using 1 column to 51.70% with 3 columns. The adsorption capacity of Zn obtained when using 3 columns in series was 3.542 mg/g. In addition, the use of adsorption columns in series can also prolong the saturation of the adsorbent, thereby extending its service life. The overall research results demonstrated that column the adsorption in series with rice husk as an adsorbent has the potential to be applied to remove heavy metals from groundwater.
The Adsorption and Regeneration of Natural Pumice as Low-Cost Adsorbent for Nitrate Removal From Water Denny Helard; Shinta Indah; Chintia Maya Sari; Hestia Mariesta
Journal of Geoscience, Engineering, Environment, and Technology Vol. 3 No. 2 (2018): JGEET Vol 03 No 02 : June (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1044.886 KB) | DOI: 10.24273/jgeet.2018.3.2.1545

Abstract

The potential of adsorption and regeneration of Indonesian natural pumice to remove nitrate from aqueous solution was studied in multiple adsorption-desorption cycles. Batch experiments were performed to examine the effect of various experimental parameters on the removal of nitrate. The optimum condition of nitrate removal by natural pumice were obtained at 3 of pH solution, 0.3 g/L of adsorbent dose, 30 min of contact time, <63 μm of particle size, and 90 mg/L of nitrate concentration with 54.79% of removal efficiency and 164.37 mg/g of nitrate uptake. The experimental data obtained were fitted with the Freundlich adsorption isotherm within the concentration range studied. Although complete desorption were not achieved, the result confirmed that HCl can be used as desorbing and recovery agent, which be desorbed 10-13% of nitrate ion. The used natural pumice also could be regenerated and reused up to three successive adsorption-desorption cycles. Overall results revealed that the ability of natural pumice to adsorb nitrate will create more interest to develop a new adsorbent from local mineral for pollutant removal from water
Kajian Kinerja Pengelolaan Sistem Penyediaan Air Minum (SPAM) di Kabupaten Solok dan Kota Solok Berbasis Buku Kinerja Badan Peningkatan Penyelenggaraan Sistem Penyediaan Air Minum Agustina Nasution; Denny Helard; Shinta Indah
CIVED Vol 8, No 3 (2021): September 2021
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v8i3.115792

Abstract

Kajian ini bertujuan untuk mendapatkan gambaran dan informasi yang lebih komprehensif mengenai kinerja Badan Usaha Milik Daerah (BUMD) penyelenggara Sistem Penyediaan Air Minum (SPAM) di Kabupaten Solok dan Kota Solok Sumatera Barat pada kurun waktu 2017-2019. Kajian dilakukan dengan mengidentifikasi dan evaluasi kondisi eksisting, menganalisis permasalahan teknis dan kinerja yang meliputi aspek keuangan, aspek pelayanan, aspek operasional dan aspek sumber daya manusia, serta melakukan penilaian kinerja. Hasil penelitian menunjukkan bahwa kinerja SPAM di wilayah studi menunjukkan nilai dan status kinerja PDAM Kabupaten Solok berada pada kisaran 2.270 – 2.340 dalam kategori tidak sehat, sedangkan PDAM di Kota Solok berada pada kisaran 2.920 – 3.100 untuk kategori tidak sehat hingga sehat. Indikator yang berhasil dipenuhi SPAM wilayah studi pada tahun 2019 adalah indikator solvabilitas, tingkat penyelesaian keluhan, rasio jumlah karyawan per 1.000 nasabah. Rekomendasi yang diusulkan secara umum meliputi upaya peningkatan minat pelanggan dalam mengkonsumsi air PDAM; mengefektifkan operasional produksi dan distribusi; meningkatkan kualitas pelayanan; serta meningkatkan kualitas sumber daya manusia melalui pengalokasian anggaran.
EVALUASI SISTEM JARINGAN DISTRIBUSI DAN PERENCANAAN PENGENDALIAN TEKANAN PADA ZONA SPAM JAWA GADUT, KECAMATAN PAUH, PDAM KOTA PADANG Tomi Wirawan; Denny Helard; Puti Sri Komala
JURNAL REKAYASA Vol 10 No 1 (2020): Jurnal REKAYASA
Publisher : Fakultas Teknik Sipil dan Perencanaan. Universitas Bung Hatta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37037/jrftsp.v10i1.51

Abstract

Penelitian ini dilatarbelakangi oleh indikasi tingginya tingkat Non Revenue Water (NRW) melalui yang ditandai tingkat komplain dan tingkat kebocoran yang cukup tinggi pada kawasan Sistem Penyediaan Air Minum (SPAM) Jawa Gadut, Kelurahan Limau Manis Selatan Kecamatan Pauh, Kota Padang. Penelitian dimulai dari mengevaluasi SPAM eksisting dan merencanakan kembali zona SPAM menggunakan plugin QWater v.3.1.7 dari QGIS v.3.4.9 yang mengintegrasikan Epanet dengan QGIS. Simulasi hidrolis per periode waktu atau Extended Period Simulation (EPS) untuk mengevaluasi kondisi hidrolis, tekanan dan kecepatan aliran terutama pada saat aliran maksimum (jam 06.00 WIB) dan pada saat aliran minimum (jam 03.00 WIB). Dari hasil simulasi diperoleh sisa tekanan melebihi 100 mka pada 51 node dari 146 node atau 35% pelayanan. Selanjutnya dilakukan optimalisasi dan pengendalian tekanan menggunakan 2 unit Pressure Reducing Valve (PRV), agar atau sehingga diperoleh sisa tekanan sesuai dengan kriteria teknis minimal yaitu rata-rata diatas 10 mka pada saat jam puncak dan tidak melebihi 100 mka pada saat jam aliran minimum. Dengan pengendalian tekanan, maka diharapkan NRW fisik pada zona SPAM Jawa Gadut dapat diturunkan sesuai dengan target yang diinginkan.
Penerapan Kolom Adsorpsi Seri dengan Adsorben Sekam Padi pada Penyisihan Logam Seng (Zn) dari Air Tanah Shinta Indah; Denny Helard; Dian Ramadhan
Jurnal Riset Kimia Vol. 12 No. 1 (2021): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i1.389

Abstract

To increase the performance of continuous adsorption with rice husks as adsorbent in Zn removal from groundwater, a series of fixed bed column was applied. The experiments were carried out at the acrylic columns having diameter of 7 cm, column height of 19.5 cm, bed height of 13.5 cm and flow rate of 2 gpm/ft2 (310 mL/minute) for 540 minutes. The number of columns used were 3 columns arranged in series and the rice husk used were in their original size (1-2 mm). The influent concentration of Zn metal was 7.62 mg/L. The results showed that the use of column adsorption in series increased the removal efficiency of Zn by rice husks, from 33.21% using 1 column to 51.70% with 3 columns. The adsorption capacity of Zn obtained when using 3 columns in series was 3.542 mg/g. In addition, the use of adsorption columns in series can also prolong the saturation of the adsorbent, thereby extending its service life. The overall research results demonstrated that column the adsorption in series with rice husk as an adsorbent has the potential to be applied to remove heavy metals from groundwater.
EFISIENSI METODE MULTI SOIL LAYERING (MSL) DALAM PENYISIHAN COD DARI LIMBAH CAIR HOTEL (Studi Kasus: Hotel X Padang) Shinta Elystia; Shinta Indah; Denny Helard
Jurnal Dampak Vol 9, No 2 (2012)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.9.2.98-105.2012

Abstract

ABSTRAKDalam penelitian dilakukan pengolahan limbah cair Hotel yang bersumber dari dapur dan laundri dengan metode Multi Soil Layering (MSL). Tujuan penelitian ini untuk menentukan efisiensi penyisihan COD dan mempelajari pengaruh faktor variasi material organik dalam campuran tanah pada lapisan anaerob dan variasi Hydraulic Loading Rate (HLR) terhadap efisiensi pengolahan limbah cair hotel dengan metode MSL. Dua buah reaktor MSL berdimensi 50 x 15 x 100 cm dengan lapisan batuan yang sama pada kedua reaktor berupa kerikil berukuran 35 mm serta lapisan anaerob berupa campuran tanah dengan arang (reaktor 1) dan campuran tanah dengan serbuk gergaji (reaktor 2) dengan rasio komposisi 2 : 1. Limbah dialirkan pada masing-masing reaktor dengan variasi HLR 500, 750, dan 1.000 l/m2hari. Konsentrasi COD sebelum diolah adalah 132,600201,240 mg/l, setelah diolah dengan MSL konsentrasi berubah menjadi 12,48088,920 mg/l. Secara umum, variasi material organik dalam campuran tanah tidak begitu berpengaruh pada penyisihan COD. Variasi HLR cukup berpengaruh, dimana HLR 500 l/m2hari memberikan efisiensi penyisihan COD yang lebih tinggi. Efisiensi penyisihan COD yang diperoleh pada penelitian ini berturut-turut pada reactor 1 berkisar antara 55 -90 % dan pada reactor 2 berkisar antara 56-89%. Hasil menunjukkan bahwa kedua reaktor mampu menyisihkan COD pada limbah cair hotel.Kata Kunci: COD, limbah cair hotel, multi soil layering (MSL)ABSTRACTResearch COD removal from hotel wastewater stemmed from laundry and kitchen with Multi Soil Layering method (MSL) was conducted. The aim were to observe COD removal efficiency and to study the effect of organic material variation in soil as the anaerob layer as well as the effect of various hydraulic loading rate (HLR). In this research, there were two MSL reactors with dimension of 50 x 15 x 100 cm. Aerob layers of both reactors in the form of gravel 3-5 mm sized while anaerob layers are composed from soil mixed with charcoal (reactor 1) and soil mixed with sawdust (reactor 2) with ratio 2:1. HLR of wastewater for each reactor are 500, 750, and 1.000 l/m2day. Concentration of COD was 132,600-201,240 mg/l. COD concentration successively reduced to 12,480-88,920 mg/l.This result indicated both reactors can cast aside COD and also neutralize hotel liquid waste pH. In general, organic material variation of in soil mixture, that is sawdust and charcoal did not show any significant influence. HLR of 500 l / m2/day allowed the best removal efficiency at each contaminant parameters. As a whole efficiency removal of COD at this research successively at reactor 1 ranged from 55-90%, and 56-89%.Key Words:COD, hotel wastewater, multi soil layering (MSL)
PENGARUH VARIASI KONSENTRASI LOGAM MANGAN (Mn) TERHADAP EFISIENSI PENYISIHAN LOGAM BESI (Fe) PADA ADSORPSI MENGGUNAKAN SERBUK KULIT JAGUNG SEBAGAI ADSORBEN Shinta Indah; Denny Helard; Rika Yedriana
Jurnal Dampak Vol 13, No 2 (2016)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.13.2.100-106.2016

Abstract

This research aims to analyze the effect of Mn concentration on the removal efficiency of Fe from aqueous solution by maize husk as adsorbent. Batch experiments were carried out at ambient temperature with the optimum condition for Fe removal i.e. 4 of pH solution, 0,075-0,250 mm of adsorbent diameter and 20 g/L of adsorbent dose with 60 min of contact time and 100 rpm of agitation speed. The variation of Mn concentration in the aqueous solutions were Fe>Mn, Fe=Mn, and Fe<Mn. The results showed that the removal efficiencies of Fe in those variation of concentration were 98,55%; 95,64%; 94,19%, while the removal efficiencies of Mn were 80,29%; 87,30%; 89,71%, respectively. The results indicated that the competitive adsorption of Fe and Mn occurred in maize husk as adsorbent and affected the diffusion properties of those metal ions for the adsorption sites on the adsorbent. The removal efficiency of Fe decreased as the Mn concentration increased in the solution. However, the removal efficiencies of Fe were still higher than Mn in all variations of concentration. This may due to the condition that used in the adsorption process was the optimum condition of Fe adsorption onto maize husk and also to the ionic radii of Fe that is smaller than Mn, thus Fe ions reached the adsorption site faster than Mn. Keywords: adsorption, competition, Fe, Mn, maize huskABSTRAKPenelitian ini bertujuan untuk menganalisis pengaruh konsentrasi logam Mn dalam air terhadap efisiensi penyisihan logam Fe pada proses adsorpsi menggunakan adsorben kulit jagung. Penelitian dilakukan dengan sistem batch pada temperatur kamar dan kondisi optimum adsorpsi Fe yaitu pH adsorbat 4, diameter adsorben 0,075-0,250 mm dan dosis adsorben 20 g/L dengan waktu pengamatan sampai 60 menit dan kecepatan pengadukan 100 rpm. Larutan yang digunakan berupa larutan artifisial dengan variasi konsentrasi Fe>Mn, Fe=Mn, dan Fe<Mn. Dari hasil penelitian didapatkan efisiensi penyisihan Fe pada variasi konsentrasi Fe>Mn, Fe=Mn, dan Fe<Mn berturut-turut adalah 98,55%; 95,64%; 94,19% dan penyisihan Mn sebesar 80,29%; 87,30%; 89,71%. Hasil ini menunjukkan bahwa terjadi kompetisi adsorpsi antara Fe dan Mn pada adsorben kulit jagung, sehingga mempengaruhi proses difusi ion-ion logam tersebut untuk mencapai sisi aktif dari adsorben. Efisiensi penyisihan Fe semakin menurun dengan semakin meningkatnya konsentrasi Mn dalam larutann, namun efisiensi penyisihan Fe tetap lebih tinggi dari Mn pada semua variasi konsentrasi. Hal ini disebabkan selain karena proses adsorpsi dilakukan pada kondisi optimum penyisihan Fe dengan adsorben kulit jagung, juga karena jari-jari ion Fe yang lebih kecil dari Mn sehingga ion Fe cenderung lebih cepat teradsorpsi pada sisi aktif adsorben.Kata kunci: adsorpsi, Fe, kompetisi, Mn, kulit jagung
PENYISIHAN KALIUM DARI LIMBAH CAIR PERSAWAHAN DENGAN METODE MULTI SOIL LAYERING (MSL) Taufiq Ihsan; Shinta Indah; Denny Helard
Jurnal Dampak Vol 10, No 2 (2013)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.10.2.133-141.2013

Abstract

Metode Multi Soil Layering (MSL) telah diujicobakan untuk menyisihkan kalium pada limbah cair persawahan.Lokasi pengambilan sampel berada di daerah Tunggang, Kelurahan Pasar Ambacang, Kecamatan Pauh, KotaPadang. Hasil analisis karakteristik limbah cair tersebut menunjukkan bahwa konsentrasi melebihi standarkonsentrasi kalium pada air. Penelitian ini menggunakan 2 buah reaktor berbahan fiberglass, berbentuktrapesium untuk sisi tegaknya, dengan dimensi panjang dan lebar alas 37 cm, panjang dan lebar sisi atas 44 cmdan tinggi 60 cm, serta lapisan aerob berupa batuan kerikil berdiameter 3-5 mm. Kedua reaktor dibedakan atasmaterial organik dalam campuran tanah pada lapisan anaerob, dimana reaktor 1 terdiri dari campuran tanahandisol dan arang, sedangkan reaktor 2 terdiri dari campuran tanah andisol dengan serbuk gergaji. Limbahcair ini dialirkan pada variasi konsentrasi antara 1,048 6,237 mg/l, serta pada Hydraulic Loading Rate (HLR)dengan variasi 1.000, 2.000, dan 4.000 l/m2hari. Hasil penelitian menunjukkan bahwa kedua reaktor mampumenyisihkan kalium mencapai 100% baik pada reaktor 1, maupun pada reaktor 2. Variasi material organikdalam campuran tanah pada lapisan anaerob, variasi konsentrasi influen, dan variasi HLR berpengaruh padapenyisihan kalium. Efisiensi penyisihan kalium didapatkan lebih tinggi pada reaktor 2 pada variasi konsentrasiinfluen terkecil, dengan pengaliran limbah cair pada HLR 1000 l/m2hari. Secara umum MSL dapatdiaplikasikan pada pengolahan limbah cair persawahan.Kata Kunci : Limbah cair persawahan, MSL, kalium