Abstract
Urea is a primary nitrogen source for plant. Conventional urea fertilizer is made from reaction between ammonia and carbon dioxide. Wastewater of urea manufacture usually contains urea ammonia in a high concentration. They can be as high as 650-4000 ppm urea and 100 – 1300 ppm ammonia/m3 wastewater. High concentrated urea and ammonia disposal to environment may lead to eutrophication in aquatic ecosystem which cause adverse impact to aquatic organism. Therefore, treatment to take urea up from urea manufacture wastewater is of interest that give double benefits : reduce urea from wastewater to meet an environmentally safe condition and obtain a low cost urea fertilizer for plant. The purpose of this study is to determine urea adsorption capacity of porous carbon in aqueous solution contains ammonia. The porous carbon as adsorbent was made from coconut shell by pyrolisis. Oxidation treatment of carbon surface was performed using sulfuric acid (50%w) at 90oC temperature for 2 hours. The adsorption was conducted at room temperature with initial urea concentration in the range of 500-8000 ppm using urea-ammonia solution as simulation liquid. Results reveal that urea adsorption capacity increase significantly 41%.in urea-ammonia solution compare to urea solution, that is in the range of 27-444 mg/g carbon.
Highlights
Pupuk merupakan salah satu bahan vital dalam pertumbuhan tanaman dan nitrogen adalah nutrisi utama dalam agroekosistem (Manikandan, dkk, 2013)
The results showed that the urea adsorption capacity increased significantly in urea-ammonia solution compared to urea solution with an increase of 41%
Effect of Na+ Impregnated Activated Carbon on The Adsorption of NH+4-N From Aqueous Solution
Summary
Pupuk merupakan salah satu bahan vital dalam pertumbuhan tanaman dan nitrogen adalah nutrisi utama dalam agroekosistem (Manikandan, dkk, 2013). Beberapa penelitian mengenai adsorpsi urea pada cairan menggunakan adsorben karbon berpori antara lain penelitian yang dilakukan oleh Pillai dkk (2013) dalam me recovery urea dari urin menggunakan karbon berpori berbahan tempurung kelapa yang diaktivasi secara microwave. Penelitian lainnya yang dilakukan oleh Kameda dkk (2016) mengenai penjerapan urea dalam cairan menggunakan karbon berpori menunjukkan bahwa adsorpsi urea dalam karbon berpori merupakan adsorpsi fisika dan paling sesuai dengan isotherm adsorpsi Halsey. Skema mekanisme adsorpsi urea pada karbon berpori Dari penelusuran pustaka yang telah dilakukan, keaslian atau kebaruan penelitian ini terletak pada penggunaan larutan urea-amonia sebagai adsorbat dalam adsorpsi urea untuk menentukan pengaruh amonia dalam larutan terhadap kapasitas adsorpsi urea oleh karbon berpori. Tujuan dari penelitian ini adalah menentukan model kesetimbangan isothern adsorpsi urea dalam larutan urea- amonia oleh karbon berpori dan memperoleh perbandingan kapasitas adsorpsi urea antara larutan urea dan larutan urea- amonia. Pada tahapan ini dapat ditentukan isotherm adsorpsi urea oleh karbon berpori dan kapasitas adsorpsi karbon berpori dalam menjerap urea
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call