Abu vulkanik dari letusan gunung yang terbawa oleh angin dan
tersebar sebenarnya tidak berbahaya, khususnya bagi tanah dan tumbuhan.
Abu vulkanik itu nyatanya juga memiliki dampak positif dan manfaat pada
sisi lain.
Bukan hanya bermanfaat sebagai pupuk tanaman, tapi ia juga bisa
memperbaiki sifat fisika tanah dan mempunyai kemampuan mengikat air.
Bahkan, abu vulkanik ini juga bisa dijadikan bahan campuran adonan semen
sebagai bahan konstruksi yang cukup bagus, karena bisa menghasilkan
kekuatan sampai 150 kilogram per satuan beban. Dan hal ini, kemungkinan
juga akan berlaku pada abu vulkanik dari letusan Gunung Kelud.
Demikian disampaikan Gunawan Budiyanto, Wakil Rektor I Universitas
Muhammadiyah Yogyakarta (UMY), saat menyampaikan penelitiannya mengenai
manfaat abu Gunung Kelud, di laboratorium Tanah, Fakultas Pertanian
Kampus Terpadu UMY. Penelitian yang dilakukannya ini juga merupakan
kegiatan dari serangkaian acara UMY Peduli Bencana Abu Gunung Kelud,
yang dilaksanakan sejak Selasa 18 Februari 2014.
Menurut Gunawan, manfaat atau dampak positif dari abu vulkanik itu
diketahui setelah dirinya serta timnya melakukan penelitian terhadap abu
vulkanik dari letusan Gunung Merapi pada tahun 2010. Sehingga, histori
dari hasil penelitian Gunung Merapi itu akan diulangi lagi pada abu
vulkanik dari letusan Gunung Kelud.
"Perbedaannya hanya satu, abu Gunung Kelud itu lebih halus
ukurannya dibanding abu Merapi. Abu Gunung Kelud itu ukuran halusnya
seperti lempung atau clay dengan diameter di bawah 0,002 milimeter," katanya, Senin 24 Februari 2014
Gunawan juga mengatakan bahwa abu gunung Kelud itu menjadi lebih
halus karena ia menempuh jarak yang lebih jauh, yaitu sekitar 200
kilometer lebih. Selain itu, karena ia lebih halus, kandungan pasirnya
tidak ikut terbawa angin. Sehingga dari hal itu, abu Gunung Kelud sudah
memiliki kelebihan dibanding abu Gunung Merapi dalam pemanfaatannya.
"Abu yang lebih halus itu lebih mudah untuk mengikat air. Dengan
begitu juga, waktu yang dibutuhkan untuk pengolahannya menjadi pupuk
tanaman, dan bahan untuk memperbaiki sifat tanah akan lebih singkat.
Karena ia sudah berpisah dengan material lain, seperti pasir itu,"
ujarnya.
Dosen Pertanian UMY ini kemudian melanjutkan secara lebih rinci
hasil penelitian yang didapatnya dari abu gunung Merapi. Menurutnya,
pengaruh positif dari abu letusan gunung itu bisa dilihat dari tiga
sisi, yakni dari sisi kimia, fisika, dan teknik sipil. Dari segi kimiawi
dapat diketahui bahwa abu vulkanik mengandung cadangan mineral yang
cukup banyak.
"Bahkan kemungkinan juga mengandung magnesium dan serum yang bisa
menjadi sumber nutrien bagi pertanian. Namun sebelumnya, abu itu sudah
mengalami lapukan, yaitu proses pelepasan unsur-unsur yang terkandung
dalam abu letusan gunung, sehingga terlepas dari unsur primernya. Maka
unsur yang baru itu bisa digunakan untuk pertanian," jelasnya.
Kemudian dari segi fisika, abu vulkanik ini memiliki kelebihan bisa
memperbaiki sifat tanah dan mengikat air, atau bisa meningkatkan daya
adhesi tanah. Sehingga, jika digunakan pada tanah berpasir akan mudah
menyerap air.
"Sementara dari teknik sipil bisa digunakan untuk bahan konstruksi,
juga untuk bahan campuran membuat adonan semen. Campuran adonan semen
dengan abu vulkanik ini bisa mengurangi bahan dari semennya sendiri
sampai 10 persen. Dan hasil campurannya juga cukup bagus," katanya.
Adapun untuk penelitian abu vulkanik dari letusan gunung Kelud
sendiri, menurut Gunawan terlebih dahulu akan diteliti mengenai sebaran
abunya, sifat-sifat fisika tentang teksturnya atau distribusi diameter
partikel tanahnya, kemampuannya untuk menyimpan air, dan mengukur pH
atau tingkat keasamannya.
"Apakah pH-nya sekitar 7 atau tidak. Sebab kemarin kita ukur pH-nya
sekitar 5 setengah, dan artinya itu tidak mengganggu tanaman. Jadi kami
juga berharap, abu dari Kelud ini juga bisa digunakan untuk hal-hal
yang berguna," katanya.
Hal lain yang juga menjadi kelebihan dari abu Kelud ini yaitu abu
vulkanik dari Kelud lebih lembab, karena dia bersifat higroskopis atau
mudah menyerap kelembaban lingkungan. Selain itu, kandungan mineralnya
juga banyak besinya, dan kadar air yang dikandungnya dalam kondisi
kering bisa mencapai 8 hingga 10 persen.
"Ini artinya, abu Kelud bisa dimanfaatkan untuk menyuburkan tanah
dan pertanian. Abu Kelud ini juga memiliki kandungan Fe (besi), Mn
(mangan), Si (silikat), Al (aluminium), Ca (kalsium), K (kalium), dan P
(fosfor). Jadi abu ini kalau sudah menjadi pupuk, bisa menjadi cadangan
jangka panjang. Dan rencananya, kami juga akan menjadikan abu Kelud ini
sebagai bahan penelitian untuk pembuatan pupuk pelet," kata dia. (eh)
Volcanic ash from the eruption that carried by the wind and spread quite harmless , especially for soil and plants . Volcanic ash was in fact also have a positive impact and benefits on the other side .Not only useful as a plant fertilizer , but it can also improve soil physical properties and has the ability to bind water . In fact , volcanic ash can also be used as a grout mixture of construction materials are quite good , because it can produce up to 150 pounds of force per unit load . And this , is also likely to apply to the volcanic ash from the eruption of Mount Kelud .This was conveyed Budiyanto Gunawan , Vice Rector of Muhammadiyah University of Yogyakarta ( St. Louis ) , when presenting his research on the benefits of Kelud ash , soil laboratory , Faculty of Agriculture, Integrated Campus in St. Louis . Her research is also an activity of a series of events in St. Louis Disasters Abu Kelud , conducted since Tuesday, February 18, 2014 .According to Gunawan , benefits or positive effects of the volcanic ash known after he and his team conducted a study of volcanic ash from the eruption of Mount Merapi in 2010 . Thus, the history of Mount Merapi research results that will be repeated again in the volcanic ash from the eruption of Mount Kelud ." The difference is only one , it Kelud ash finer size than Merapi ash . Abu Kelud the size of the fine as clay or clay with a diameter below 0.002 millimeter , " he said , Monday, February 24, 2014Gunawan also said that the ash Kelud it becomes more subtle because it further distances , which is about 200 kilometers more . In addition , because it is more subtle , the content of the sand is not carried on the wind . So from that , ash Kelud already has advantages over Mount Merapi ash utilization." Abu finer it easier to bind water . With so too , the time required for processing into fertilizer plants , and materials to improve soil properties will be shorter . Because he had split with other materials , such as sand ," he said .Lecturer Agriculture UMY then continued in more detail the results of research that he got from the ashes of Mount Merapi . According to him , the positive influence of ash eruptions can be seen from three sides , namely in terms of chemistry , physics , and civil engineering . In terms of chemistry can be seen that the volcanic ash contains considerable mineral reserves ." Even the possibility also contains magnesium and serum that could be a source of nutrients for agriculture . Yet before the ashes had been experiencing lapukan , namely the release of elements contained in the ash eruptions , so regardless of the primary element . Then the new elements that could used for agriculture , " he explained .Then in terms of physics , it has the advantages of volcanic ash can improve the binding properties of the soil and water , or soil can improve adhesion . So that , if used on sandy soil will absorb water easily ." While the civil engineering can be used for construction materials , as well as to make dough cement mixture . Mixed grout with this volcanic ash can reduce the material of the cement itself to 10 percent . Thereof and the results are pretty good too , " he said .As for the study of volcanic ash from the eruption of Mount Kelud alone , according to Gunawan will first be asked to spread his ashes , physical properties of texture or particle diameter distribution of the soil , its ability to store water , and measuring the pH or acidity level ." Is the pH around 7 or not . Because yesterday we measure its pH about 5 and a half , and that means it does not interfere with the plant . So we also hope , ashes of Kelud can also be used for things that are useful , " he said .It is also the strengths of this Kelud ash from the volcanic ash that is more moist Kelud , because he is hygroscopic or easily absorb moisture environment . In addition , too much iron mineral content , and water content in dry conditions it contains can reach 8 to 10 percent .
" It means , Kelud ash can be used to fertilize the soil and agriculture . Abu Kelud also contains Fe ( iron ) , Mn ( manganese ) , Si ( silicate ) , Al ( aluminum ) , Ca ( calcium ) , K ( potassium ) , and P ( phosphorus ) . So this ash when it becomes fertilizer , could be a long- term backup . and the plan , we will also make this Kelud ash as research material for the manufacture of fertilizer pellets , " he said . ( eh )
sources : http://nasional.news.viva.co.id/news/read/483805-abu-vulkanik-kelud-bisa-dijadikan-campuran-adonan-semen
Volcanic ash from the eruption that carried by the wind and spread quite harmless , especially for soil and plants . Volcanic ash was in fact also have a positive impact and benefits on the other side .Not only useful as a plant fertilizer , but it can also improve soil physical properties and has the ability to bind water . In fact , volcanic ash can also be used as a grout mixture of construction materials are quite good , because it can produce up to 150 pounds of force per unit load . And this , is also likely to apply to the volcanic ash from the eruption of Mount Kelud .This was conveyed Budiyanto Gunawan , Vice Rector of Muhammadiyah University of Yogyakarta ( St. Louis ) , when presenting his research on the benefits of Kelud ash , soil laboratory , Faculty of Agriculture, Integrated Campus in St. Louis . Her research is also an activity of a series of events in St. Louis Disasters Abu Kelud , conducted since Tuesday, February 18, 2014 .According to Gunawan , benefits or positive effects of the volcanic ash known after he and his team conducted a study of volcanic ash from the eruption of Mount Merapi in 2010 . Thus, the history of Mount Merapi research results that will be repeated again in the volcanic ash from the eruption of Mount Kelud ." The difference is only one , it Kelud ash finer size than Merapi ash . Abu Kelud the size of the fine as clay or clay with a diameter below 0.002 millimeter , " he said , Monday, February 24, 2014Gunawan also said that the ash Kelud it becomes more subtle because it further distances , which is about 200 kilometers more . In addition , because it is more subtle , the content of the sand is not carried on the wind . So from that , ash Kelud already has advantages over Mount Merapi ash utilization." Abu finer it easier to bind water . With so too , the time required for processing into fertilizer plants , and materials to improve soil properties will be shorter . Because he had split with other materials , such as sand ," he said .Lecturer Agriculture UMY then continued in more detail the results of research that he got from the ashes of Mount Merapi . According to him , the positive influence of ash eruptions can be seen from three sides , namely in terms of chemistry , physics , and civil engineering . In terms of chemistry can be seen that the volcanic ash contains considerable mineral reserves ." Even the possibility also contains magnesium and serum that could be a source of nutrients for agriculture . Yet before the ashes had been experiencing lapukan , namely the release of elements contained in the ash eruptions , so regardless of the primary element . Then the new elements that could used for agriculture , " he explained .Then in terms of physics , it has the advantages of volcanic ash can improve the binding properties of the soil and water , or soil can improve adhesion . So that , if used on sandy soil will absorb water easily ." While the civil engineering can be used for construction materials , as well as to make dough cement mixture . Mixed grout with this volcanic ash can reduce the material of the cement itself to 10 percent . Thereof and the results are pretty good too , " he said .As for the study of volcanic ash from the eruption of Mount Kelud alone , according to Gunawan will first be asked to spread his ashes , physical properties of texture or particle diameter distribution of the soil , its ability to store water , and measuring the pH or acidity level ." Is the pH around 7 or not . Because yesterday we measure its pH about 5 and a half , and that means it does not interfere with the plant . So we also hope , ashes of Kelud can also be used for things that are useful , " he said .It is also the strengths of this Kelud ash from the volcanic ash that is more moist Kelud , because he is hygroscopic or easily absorb moisture environment . In addition , too much iron mineral content , and water content in dry conditions it contains can reach 8 to 10 percent .
" It means , Kelud ash can be used to fertilize the soil and agriculture . Abu Kelud also contains Fe ( iron ) , Mn ( manganese ) , Si ( silicate ) , Al ( aluminum ) , Ca ( calcium ) , K ( potassium ) , and P ( phosphorus ) . So this ash when it becomes fertilizer , could be a long- term backup . and the plan , we will also make this Kelud ash as research material for the manufacture of fertilizer pellets , " he said . ( eh )
sources : http://nasional.news.viva.co.id/news/read/483805-abu-vulkanik-kelud-bisa-dijadikan-campuran-adonan-semen
Sumber : http://nasional.news.viva.co.id/news/read/483805-abu-vulkanik-kelud-bisa-dijadikan-campuran-adonan-semen
