Central Chemical Laboratory of Integrated Lab UIN Syarif Hidayatullah is one of the largest wastewater containing hazardous materials is high enough, one of which is metal Cu 2+. The most effective method for reducing heavy metal pollutants are adsorption, adsorbent consists of two types namely cationic and anionic adsorbent. The advantages of the adsorbent aniok is easily synthesized, so it is more effective than the cationic absorbent. Type of anionic adsorbent is hydrotalcite. Material hydrotalcite synthesized using methods kopresitipasi with the basic materials for the Mg / Al hydrotalcite is MgCl2.6H2O with AlCl3.6H2O and for Zn-Al hydrotalcite is ZnSO4.7H2O and AlCl3.6H2O. The results of this research to know the characteristics of the adsorbent of Mg / Al hydrotalcite and Zn / Al hydrotalcite in which the Cu 2+ metal mengadsorb characterization of Mg / Al hydrotalcite had basal spacing d003 Ǻ = 7.57, d006= 3.80 Ǻ, d009 = 2.57Ǻ and Zn / Al hydrotalcite had basal spacing d003 Ǻ = 7.54, d006 = 3.78 Ǻ, d009 = 2.59Ǻ. In addition, the structure of Zn / Al hydrotalcite has a relative content or purity is as high as 91.74% when compared with Mg / Al hydrotalcite that only contain relative or purity of the sample is only about 81.3%. The higher the relative content of a substance, the greater the absorption in a metal adsorbing Cu2+ so that optimization of the adsorption capacity of Zn / Al hydrotalcite to metal Cu 2+ is greater when compared with Mg / Al hydrotalcite. Cu metal ion adsorption by hydrotalcite satisfy the equation Langmuir and Freundlich adsorption isotherm. Determination of adsorption capacity of the zeolite to the most appropriate waste Cu is using Freundlich adsorption equation compared with the Langmuir adsorption equation. The maximum adsorption capacity of Mg / Al hydrotalcite and Zn / Al hydrotalcite against waste adsorption Cu is 2.114 mg / g and 1.284 mg / gram.
Kualitas udara dalam ruagan merupakan faktor resiko bahaya yang dapat mempengaruhi kesehatan pekerja. Penurunan kualitas udara dalam ruangan dapat menyebabkan sick building syndrome. Tujuan penelitian ini untuk mengetahui kualitas udara dalam ruangan perkantoran dengan parameter SO2, CO, NO2, DAN TSP. Penelitian ini merupakan penelitian observasional yang dilakukan pada perusahaan PT Karyatara Cemara Indah yang bergerak dibidang sector kegiatan bongkar muat curah cair propylene di Kawasan Pelindo II, Panjunan Lemahwungkuk Kota Cirebon, Jawa Barat. Sampel yang digunakan dalam penelitian ini adalah sebanyak 3 ruangan dengan parameter SO2, CO, NO2, DAN TSP. Metode yang digunakan untuk parameter NO2 dan SO2 yaitu dengan menggunakan spektrofotometri, CO menggunakan metode CO analyzer dan debu total menggunakan metode Gravimetri. Hasil yang didapatkan dari penelitian ini adalah konsentrasi SO2 tertinggi berada di bagian maintenance sebesar 0,1130 mg/m3 dengan nilai RQ 0,3594. Dalam hal ini konsentrasi tersebut masih di bawah NAB dan untuk nilai RQ juga dalam tingkat risiko aman. Konsentrasi CO tertinggi terdapat di bagian maintenance dengan nilai 1,9235 mg/m3 dengan nilai RQ 0,0208. Konsentrasi NO2 tertinggi terdapat di bagian maintenance dengan nilai 0,0510 mg/m3 dengan nilai RQ 0,3967 dan Konsentrasi TSP tertinggi terdapat di bagian maintenance dengan nilai 2,3040 mg/m3 dengan nilai RQ 0,0787. Nilai konsentrasi SO2, CO, NO2 dan TSP berada jauh di bawah NAB dan nilai RQ juga masih dalam tingkat risiko aman. Upaya untuk meminimalisir gangguan yang disebabkan oleh keempat risk agent tersebut bisa dilakukan pengaturan lingkungan kerja, pengaturan jam kerja, dan selalu melakukan pemantauan konsentrasi risk agent
Particulate matter (PM) is an air pollutant that has an impact on public health, especially in an urban area. The objective of this study was to analyze the personal concentration of PM2.5 and its composition among police working in the roadside area in Jakarta. PM measurement has done to the policeman that controlled traffic on four near highway locations in Jakarta. Sioutas impactor, Leland Legacy personal pump, and quartz fiber filter were chosen to measure the fine particles. Each PM was measured for 8-hour period. PM concentration was analyzed by the gravimetric method while tracing element and black carbon in PM0.25 by energy dispersive X-ray fluorescence (EDXRF) and EEL Smoke Stain Reflectometer. As a result, near highway PM2.5 concentration in Jakarta during weekdays and weekends measurement are 92.18 ± 10.66 μg/m3, and 78.09 ± 11.61 μg/m3. S, K, Fe, Ca, Zn, and Pb are major elements found in all locations. The black carbon concentration in all location was 17 ± 5.7 μg/m3. A high concentration of fine particles, a traffic-related trace element in PM0.25, and black carbon are showed that traffic-related source is the major contributor to a high level of fine particulate matter at near highway locations in Jakarta. The weekday's concentration of PM2.5 and PM0.25 among Jakarta Policemen was higher than in the weekend concentration. A particle with size of less than 0.25 µm dominated the fine particles concentration. Further researcher is expected to see the difference in the effects of traffic-related particulate matter exposure between traffic policeman and police who work at office.
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