scholarly journals Analisis Kelimpahan Mikroplastik Pada Air Permukaan di Sungai Metro, Malang

2021 ◽  
Vol 8 (2) ◽  
pp. 74-84
Author(s):  
Alexander Tunggul Sutanhaji ◽  
◽  
Bambang Rahadi ◽  
Nazarina Tiftah Firdausi ◽  
◽  
...  

Mikroplastik merupakan plastik dengan ukuran kecil yaitu <5mm. Berdasarkan sumbernya, mikroplastik primer yaitu di produksi dalam ukuran yang kecil untuk kepentingan tertentu dan rnikroplastik sekunder berasal dari penguraian plastik yang lebih besar sebelumnya. Penelitian dilakukan di Sungai Metro Malang yang mengalir melalui Kota Malang dan berakhir di Kecamatan Kepanjen Kabupaten Malang. Tujuan dari penelitian ini yaitu mengetahui jenis, kelimpahan dan sumber mikroplastik di Sungai Metro Malang. Sampel air diambil pada tiga titik lokasi yaitu hulu, tengah dan hilir. Tahapan penelitian yaitu penyaringan sampel, pengeringan sampel, pemurnian dengan Wet Peroxide Oxidation (WPO) yaitu dengan 20 mL larutan Fe (II) 0.05 M, larutan H202 20 mL dan NaCl 6 gram per 20 mL sampel, pemisahan partikel dengan density separator dan pengamatan dengan mikroskop Olympus SZX 16. Jenis mikroplastik yang ditemukan yaitu fiber, film dan fragmen dengan jumlah yang paling banyak yaitu pada titik 3 (hilir). Warna mikroplastik yang didapatkan yaitu bening, biru, merah, dll. Ukuran mikroplastik paling banyak yaitu pada saringan 177 μm. Kelimpahan dan beban pencemar mikroplastik didapatkan paling tinggi yaitu jenis fiber pada titik 3 (hilir). Mikroplastik diketahui bersumber dari adanya penggunaan plastik pada lahan pertanian dan pemukiman yang menjadi tata guna lahan di Daerah Aliran Sungai (DAS) Metro Malang.

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 40450-40460
Author(s):  
Carlos Andrés Vallejo ◽  
Luis Alejandro Galeano ◽  
Raquel Trujillano ◽  
Miguel Ángel Vicente ◽  
Antonio Gil

Significantly intensified preparation of Al/Fe-hydrolysed-pillaring solutions and solvent-free intercalation of bentonites yielding Al/Fe-PILCs highly active in catalytic wet peroxide oxidation.


RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41867-41876 ◽  
Author(s):  
Yang Yu ◽  
Huangzhao Wei ◽  
Li Yu ◽  
Tong Zhang ◽  
Sen Wang ◽  
...  

Organic synthesis is used to investigate the degradation of m-cresol and the intermediates are identified by in situ NMR.


2005 ◽  
Vol 31 (6) ◽  
pp. 481-484
Author(s):  
Kazuyoshi Suzuki ◽  
Kiyokazu Okawa ◽  
Toshihiro Takeshita ◽  
Katsuyuki Nakano ◽  
Toyokazu Yokomaku

2016 ◽  
Vol 199 ◽  
pp. 170-186 ◽  
Author(s):  
Rui S. Ribeiro ◽  
Zacharias Frontistis ◽  
Dionissios Mantzavinos ◽  
Danae Venieri ◽  
Maria Antonopoulou ◽  
...  

2017 ◽  
Vol 16 ◽  
pp. 21-27 ◽  
Author(s):  
Nady A. Fathy ◽  
Sahar M. El-Khouly ◽  
Neveen A. Hassan ◽  
Reham M.S. Awad

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 673 ◽  
Author(s):  
Juan Rueda Márquez ◽  
Irina Levchuk ◽  
Mika Sillanpää

Catalytic wet peroxide oxidation (CWPO) is emerging as an advanced oxidation process (AOP) of significant promise, which is mainly due to its efficiency for the decomposition of recalcitrant organic compounds in industrial and urban wastewaters and relatively low operating costs. In current study, we have systemised and critically discussed the feasibility of CWPO for industrial and urban wastewater treatment. More specifically, types of catalysts the effect of pH, temperature, and hydrogen peroxide concentrations on the efficiency of CWPO were taken into consideration. The operating and maintenance costs of CWPO applied to wastewater treatment and toxicity assessment were also discussed. Knowledge gaps were identified and summarised. The main conclusions of this work are: (i) catalyst leaching and deactivation is one of the main problematic issues; (ii) majority of studies were performed in semi-batch and batch reactors, while continuous fixed bed reactors were not extensively studied for treatment of real wastewaters; (iii) toxicity of wastewaters treated by CWPO is of key importance for possible application, however it was not studied thoroughly; and, (iv) CWPO can be regarded as economically viable for wastewater treatment, especially when conducted at ambient temperature and natural pH of wastewater.


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