Judul: Estimation of the Value of Externalities from the Existence of Landfills (Case Study: Maju Hamlet, Durian Village, Aceh Tamiang District)
Abstrak: Salah satu kota di Indonesia yang juga tidak lepas terkait masalah persampahan adalah Aceh Tamiang. Bertambahnya jumlah penduduk diiringi dengan pengelolaan yang belum memadai membuat volume sampah di Kabupaten Aceh Tamiang terus meningkat. Tempat Pembuangan Akhir (TPA) memiliki manfaat sebagai tempat pembuangan akhir sampah masyarakat. Pengelolaan sampah di Kabupaten Aceh Tamiang saat ini dinilai masih kurang ramah lingkungan yang menimbulkan dampak bagi masyarakat sekitar. Dampak yang ditimbulkan berupa eksternalitas positif maupun eksternalitas negatif. Eksternalitas positif dari keberadaan TPA Desa Durian yaitu adanya pendapatan masyarakat yang bersumber dari TPA, sedangkan Eksternalitas negatifnya yaitu adanya bau tidak sedap di sekitaran jalanan tempat tinggal masyarakat, air sampah yang jatuh dari truk pengangkutan, dan lalat yang berada di rumah masyarakat. Berdasarkan hal tersebut tujuan dari penelitian ini yaitu (1) Menganalisis persepsi masyarakat mengenai kondisi lingkungan sekitar TPA. (2) Mengestimasi nilai eksternalitas dari keberadaan TPA. Metode yang yang digunakan dalam penelitian ini adalah analisis pendapatan, rating scale, cost of illness, dan preverentif cost. Hasil penelitian menunjukan bahwa masyarakat menilai keberadaan TPA Desa Durian berdampak terhadap kualitas lingkungan. Estimasi nilai eksternalitas positif dari keberadaan TPA Desa Durian lebih besar dibandingkan dengan nilai eksternalitas negatif yang dirasakan masyarakat sekitar TPA Desa Durian., One of the cities in Indonesia that is also related to waste problems is Aceh Tamiang. The increase in population accompanied by inadequate management makes the volume of waste in Aceh Tamiang Regency continue to increase. Landfills have the benefit og being the final disposal site for community waste. Waste management in Aceh Tamiang Regency is currently considered less environmentally friendly which has an impact on the surrounding community. The impacts can be in the form of positive externalities and negative externalities. The postivie externality of the existence of the Durian Village Landfill is the community income that comes from the landfill, while the negative externality is the unpleasant odor around the streets where people live, garbage water that falls from the transportation truck, and flies in people’s homes. Based on this, the objectives of this study are (1) Analyzing community perceptions of environmental conditions around the landfill. (2) To estimate the ecternality value of the landfill. The methods used in this research are income analysis, rating scale, cost of illness, and preventive cost. The result showed that the community considered the presence of the Durian Village landfill to have an impact on environmental quality. The estimated value of positive externalities from the existence of the Durian Village Landfill is greater than the value of negative externalities felt by the community around the Durian Village Landfill.
Keyword: Kerugian ekonomi, persepsi masyarakat, cost of illness, Manfaat Ekonomi, Rating Scale

Judul: Value of Community Economic Benefits and Losses from the Existence of Gampong Jawa Landfills in Banda Aceh City
Abstrak: Pertumbuhan penduduk dan peningkatan perekonomian menyebabkan perubahan pola konsumsi masyarakat yang akan menambah jumlah sampah, khususnya sampah plastik. Kota Banda Aceh memiliki TPA Gampong Jawa sebagai satu-satunya TPA di Kota Banda Aceh. Banyaknya sampah yang diangkut ke TPA memberikan dampak positif maupun negatif bagi masyarakat sekita TPA. Dampak positif berupa penambahan penghasilan bagi masyarakat dan dampak negatif berupa terganggunya kesehatan masyarakat serta perlu adanya pengganti air bersih. Penelitian ini bertujuan untuk (1) Menganalisis persepsi masyarakat Gampong Jawa terhadap keberadaan TPA Gampong Jawa, (2) Mengestimasi nilai manfaat ekonomi dari keberadaan TPA Gampong Jawa, dan (3) Mengestimasi nilai kerugian ekonomi masyarakat akibat keberadaan TPA Gampong Jawa. Metode yang digunakan adalah analisis deskriptif skala likert, analisis pendapatan, cost of illness, dan replacement cost. Hasil dari penelitian ini menunjukkan persepsi masyarakat Gampong Jawa terhadap keberadaan TPA Gampong Jawa adalah baik. Estimasi nilai manfaat ekonomi dari keberadaan TPA Gampong Jawa adalah sebesar Rp382.592.000 per tahun. Total nilai kerugian ekonomi akibat keberadaan TPA Gampong Jawa sebesar Rp216.451.361 per tahun., Population growth and an increase in the economy have led to changes in people's consumption patterns which will increase the amount of waste, especially plastic waste. The city of Banda Aceh has the Gampong Jawa Landfill as the only landfill in Banda Aceh City. The amount of waste that is transported to the landfill has both positive and negative impacts on the community around the landfill. The positive impact is in the form of additional income for the community and the negative impact is the disruption of public health and the need for a replacement for clean water. This study aims to (1) analyze the perception of the Gampong Jawa community on the existence of the Gampong Jawa Landfill, (2) estimate the value of the economic benefits from the existence of the Gampong Jawa Landfill, and (3) estimate the value of the community's economic losses due to the existence of the Gampong Jawa Landfill. The method used is descriptive analysis likert scale, income analysis, cost of illness, and replacement cost. Based on the results that perception of the Gampong Jawa community towards the existence of the Gampong Jawa Landfill is good. The estimated value of the economic benefits from the existence of the Gampong Jawa Landfill is 382,592,000 IDR per year. The total value of economic losses due to the existence of the Gampong Jawa Landfill is 216,451,361 IDR per year.
Keyword: cost of illness, income analysis, likert scale, replacement cost

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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