Chemical denitrification of water by zero-valent magnesium powder

Kumar, Manish; Chakraborty, Saswati

doi:10.1016/j.jhazmat.2005.11.031

Cited by 130 publications

(108 citation statements)

References 34 publications

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“…Penggunaan serbuk Zn > 100,0 mg dapat mengakibatkan reaksi 1 tidak optimal karena serbuk Zn mendonorkan elektron lebih banyak sehingga menghasilkan amonia. Hal ini sesuai dengan hasil penelitian Kumar dan Chakraborty (2006), di mana amonia lebih banyak dihasilkan daripada nitrit saat Mg yang digunakan lebih banyak.…”

Section: Optimasi Kondisi Analisis Nitrat Menggunakan Serbuk Znunclassified

MONITORING KADAR NITRIT DAN NITRAT PADA AIR SUMUR DI DAERAH CATUR TUNGGAL YOGYAKARTA DENGAN METODE SPEKTROFOTOMETRI UV-VIS (Monitoring of Nitrite and Nitrate Content in Ground Water of Catur Tunggal Region of Yogyakarta by UV-VIS Spectrophotometry)

Setiowati¹,

Roto²,

Wahyuni³

2016

J. Man & Ling.

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AbstrakMetode analisis nitrit dan nitrat perlu dikembangkan untuk memonitor kualitas air minum. Kualitas air sumur untuk parameter nitrit dan nitrat dipengaruhi oleh kondisi lingkungan dan kedalaman air sumur. Penelitian ini bertujuan menganalisis nitrit dan nitrat menggunakan asam p-aminobenzoat (PABA) pada air sumur di daerah perkotaan Yogyakarta. Analisis nitrit didasarkan pada reaksi antara ion nitrit dengan PABA yang membentuk senyawa azo dengan panjang gelombang maksimum 546 nm. Kedalaman air sumur di daerah Catur Tunggal rata-rata > 10 m. Kadar nitrit dan nitrat pada air sumur adalah 0,05-0,09 dan 8,22-36,58 mg/L. Kadar nitrit dan nitrat tersebut memenuhi baku mutu dan aman untuk dikonsumsi. Konsentrasi nitrit dan nitrat pada air RO adalah 0,05 dan 2,72-59,57 mg/L. Kadar nitrit pada air RO tidak memenuhi baku mutu sedangkan kadar nitrat memenuhi baku mutu kecuali RO 5.Kata kunci: air sumur, asam p-aminobenzoat, kualitas air minum, nitrat, nitrit. AbstractThe method for analysis nitrite and nitrate had to developed to monitor the drinking water quality. PENDAHULUANPeningkatan jumlah penduduk perkotaan akan meningkatkan kebutuhan air bersih. Salah satu sumber air bersih adalah air tanah. Peranan air tanah semakin lama semakin penting karena air tanah menjadi sumber utama air untuk memenuhi kebutuhan pokok hajat hidup orang banyak seperti air minum, rumah tangga, industri, irigasi, perkotaan, dan lain-lain (Zeffitni, 2012). Salah satu pemanfaatan air tanah sebagai sumber air minum adalah penggunaan air sumur. Oleh karena itu, air sumur harus memenuhi parameter kualitas air minum seperti kandungan nitrit dan nitrat.Senyawa nitrogen (nitrit, nitrat dan amonia) di perairan secara alami berasal dari metabolisme organisme perairan dan dekomposisi bahan-bahan organik oleh bakteri (Indrayani dkk., 2015). Selain itu, nitrit dan nitrat di alam dapat dihasilkan secara alami maupun dari aktivitas manusia. Sumber alami nitrit dan nitrat adalah siklus nitrogen sedangkan sumber dari aktivitas manusia berasal dari penggunaan pupuk nitrogen, limbah industri dan limbah organik manusia. Pembentukan nitrit dan nitrat pada siklus nitrogen terjadi melalui proses fiksasi nitrogen oleh bakteri Rhizobium, nitrifikasi dan dinitrifikasi oleh bakteri Pseudomonas denitrifican. Nitritifikasi melibatkan dua proses yaitu nitritasi oleh bakteri Nitrosomonas dan nitratasi oleh bakteri Nitrobacter. Pada kondisi anaerob, nitrat adalah bentuk nitrogen yang cukup stabil tetapi dapat direduksi menjadi nitrit melalui proses nitratasi (Rosca dkk., 2009).

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Section: Optimasi Kondisi Analisis Nitrat Menggunakan Serbuk Znunclassified

MONITORING KADAR NITRIT DAN NITRAT PADA AIR SUMUR DI DAERAH CATUR TUNGGAL YOGYAKARTA DENGAN METODE SPEKTROFOTOMETRI UV-VIS (Monitoring of Nitrite and Nitrate Content in Ground Water of Catur Tunggal Region of Yogyakarta by UV-VIS Spectrophotometry)

Setiowati¹,

Roto²,

Wahyuni³

2016

J. Man & Ling.

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“…NZVI supplemented with the secondary metal is a new technique for nitrate removal, which enhances the catalytic reactivity through hydrogenation [21,22]. Secondary metal also enhances reaction rate [23].…”

Section: Introductionmentioning

confidence: 99%

Comparing and Optimizing Nitrate Adsorption from Aqueous Solution Using Fe/Pt Bimetallic Nanoparticles and Anion Exchange Resins

Daud

Khan

Ashgar

et al. 2015

Journal of Nanotechnology

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This research work was carried out for the removal of nitrate from raw water for a drinking water supply. Nitrate is a widespread ground water contaminant. Methodology employed in this study included adsorption on metal based nanoparticles and ion exchange using anionic resins. Fe/Pt bimetallic nanoparticles were prepared in the laboratory, by the reduction of their respective salts using sodium borohydride. Scanning electron microscope, X-ray diffraction, energy dispersive spectrometry, and X-ray florescence techniques were utilized for characterization of bimetallic Fe/Pt nanoparticles. Optimum dose, pH, temperature, and contact time were determined for NO 3 − removal through batch tests, both for metal based nanoparticles and anionic exchange resin. Adsorption data fitted well the Langmuir isotherm and conformed to the pseudofirst-order kinetic model. Results indicated 97% reduction in nitrate by 0.25 mg/L of Fe/Pt nanoparticles at pH 7 and 83% reduction in nitrate was observed using 0.50 mg/L anionic exchange resins at pH 4 and contact time of one hour. Overall, Fe/Pt bimetallic nanoparticles demonstrated greater NO 3 − removal efficiency due to the small particle size, extremely large surface area (627 m 2 /g), and high adsorption capacity.

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“…However, maintaining biological processes at their optimum conditions is very difficult. In recent years chemical methods of nitrate removal using zero-valent metals like iron (Fe 0 ), aluminum (Al 0 ) and magnesium (Mg 0 ) has been studied intensively (Huang and Zhang, 2004;Huang and Zhang, 2002;Chen et al, 2005;Kielemoes et al, 2000;Fanning, 2000;Kumar and Chakraborty, 2006). In aqueous system at acidic pH, Fe 0 is oxidized to ferrous ion (Fe 2þ ) and nitrate ion is reduced to ammonia or nitrogen gas (Yang and Lee, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…At pH above 10.5, Al 0 also reduces nitrate to ammonium ion and itself is oxidized to Al 3þ ion (Huang and Zhang, 2002). In acidic medium, Mg 0 is oxidized to Mg 2þ ion and nitrate ion is reduced to nitrogen gas or ammonium ion (Kumar and Chakraborty, 2006). However, challenges like high dose requirement, long reaction time and rapid deactivation of metal surfaces due to hydroxide precipitation were observed.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical characterization of hydroxyapatite and its application towards removal of nitrate from water

Islam¹,

Mishra²,

Patel

2010

Journal of Environmental Management

103

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Chemical denitrification of water by zero-valent magnesium powder

Cited by 130 publications

References 34 publications

MONITORING KADAR NITRIT DAN NITRAT PADA AIR SUMUR DI DAERAH CATUR TUNGGAL YOGYAKARTA DENGAN METODE SPEKTROFOTOMETRI UV-VIS (Monitoring of Nitrite and Nitrate Content in Ground Water of Catur Tunggal Region of Yogyakarta by UV-VIS Spectrophotometry)

MONITORING KADAR NITRIT DAN NITRAT PADA AIR SUMUR DI DAERAH CATUR TUNGGAL YOGYAKARTA DENGAN METODE SPEKTROFOTOMETRI UV-VIS (Monitoring of Nitrite and Nitrate Content in Ground Water of Catur Tunggal Region of Yogyakarta by UV-VIS Spectrophotometry)

Comparing and Optimizing Nitrate Adsorption from Aqueous Solution Using Fe/Pt Bimetallic Nanoparticles and Anion Exchange Resins

Physicochemical characterization of hydroxyapatite and its application towards removal of nitrate from water

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