The objective of the study was to examine the levels of mercury concentrations in plants due to the traditional gold mining of Buladu, Sumalata District, Gorontalo Regency. Buladu gold mining was located in Sumalata District, North Gorontalo Regency, Gorontalo Province. Plant samples were taken in 3 locations, namely plants living along the Hulawa River, living near to the tailings and those in residential areas. The number of plants that became the samples along the Hulawa River were 13 samples, 5 samples in the tailings, and 16 samples in residential areas. The total number of plants were as many as 34 samples. The samplings were taken from the roots and leaves so that there were a total of 68 samples. Plant analysis was carried out using mercury analyzer at UGM Integrated Research and Testing Laboratory. The quality standard used as a reference for plants employed the Decree of the Director General of National Agency of Drug and Food Control No: 03725 / B / SK / VII / 89, where mercury levels could not exceed 0.5 mg / kg. Data analysis used tables and graphs and was subsequently interpreted. The results showed that the concentration of mercury in the leaves of plants living along the Hulawa River ranged from 0.00142 mg / kg to 0.41617 mg / l and that in the root ranged from <0.00014 - 14.890 mg / kg. Mercury concentrations in plants living around the tailings in leaves ranged between <0.00014 - 1.30822 and at roots ranging from 0.01058 - 12.59366. In residential areas, the concentration of mercury in leaves ranged from <0.00014-1.44368 mg / kg and in the root ranged from <0.00014-1.94505. Based on these results, the concentration of mercury in plants along the river, around the tailings and in the people’s resident area tended to be above the quality standards set by the Decree of the Director General of National Agency of Drug and Food Control No: 03725 / B / SK / VII / 89.

Penelitian ini bertujuan untuk mengetahui konsentrasi merkuri pada ikan di perairan Laut Sulawesi akibat Penambangan Emas Tradisional Buladu. Lokasi penelitian  dilakukan di perairan laut di Desa Buladu Kecamatan Sumalata Kabupaten Gorontalo Utara. Jenis ikan yang dijadikan sampel yakni   jenis-jenis ikan kakap dan kerapu. Pengambilan sampel pada ikan dilakukan secara acak sebanyak 18 sampel. Analisis sampel merkuri pada ikan dilakukan pada laboratorium pembinaan dan pengujian mutu hasil perikanan provinsi Gorontalo dengan menggunakan AAS tanpa nyala. Baku mutu yang dijadikan acuan untuk konsentrasi merkuri pada ikan menggunakan Sk Dirjen POM No: 03725/B/SK/VII/89 sebesar 0,5 mg/kg.  Hasil analisis konsentrasi merkuri pada ikan berkisar 0,3154 – 2,2977 mg/kg. Konsentrasi rata-rata sebesar 1,1882 mg/kg. Hasil analisis ini sudah berada diatas baku mutu yang ditetapkan sebesar 0,5 mg/kg (SK Dirjen POM No: 03725/B/SK/VII/89). Salah satu faktor penyebab tingginya konsentrasi merkuri pada ikan yaitu akibat penambang yang membuang limbah ke sungai dan bermuara ke Laut Sulawesi. Hal ini dapat membahayakan kesehatan masyarakat di Kecamatan Sumalata dan Kabupaten Gorontalo Utara  pada umumnya.

This study aims to identify mercury concentrations in head hair and its effect on public health at the traditional gold mining. The study was conducted at the gold mining, Buladu Village, North Gorontalo Regency. Samples were taken randomly from human head hair. Samples of public health condition were taken from respondents who served as the samples of mercury concentrations in the head hair. The number of respondents was 20 people. The samples of mercury in the head hair were analyzed at the Integrated Research and Testing Laboratory of UGM by using mercury analyzer. The quality standard used as a reference to the mercury concentrations in the head hair was the recommendation of the National Research Council (NCR), i.e. 12 ppm. The results of the analysis of the public health were tabulated and then interpreted. The results of the analysis indicated that the highest mercury concentration in the head hair was 952.85 mg/kg and the lowest was 0.03 mg/kg with an average mercury concentration of 55.09 mg/kg. This result was above the threshold quality standards established by NCR, i.e. 12 ppm. Many factors affect the mercury concentrations in humans, including education, income, environmental sanitation and food consumption. Waste dumped directly into the river will affect river water and marine aquatic animals. The consumption of food taken from the waters of Sulawesi Sea affects influence the mercury concentrations in the head hair.

No abstract

Time management is an attempt to complete a project. This is supposed to improve priorities, and effort to increase the efficiency and effectiveness of project management in order to achieve maximum results from available resources. All of that is to achieve the goals of a construction project, specifically success that satisfy the criteria of time (schedule), cost (budget) and quality. The aspects of time management consist of scheduling, monitoring, comparing progress in the field with scheduling, determining the effects caused at the end of completion, planning treatment to control the effects, updating project scheduling. Analysis of the calculations proves that in the late jobs, the crash program can be done by increasing the number of workers to minimize the duration that is too late. The monitoring can reduce the deviation between progress against the schedule. The monitoring includes measurement and work results (progress) of each activity, then the measurement results are recorded (Report) into a report form. The monitoring includes measuring and recording the results of work, recording resource usage, checking the quality of resources, recording performance and productivity, checking the possibility of emergence of new critical paths, corrective action and update schedules. From this study the results obtained by the completion of work using time management work in construction of auditorium building of the Bone Bolango regents office can be accelerated by 40 %.