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.
Penelitian ini bertujuan untuk mengestimasikan performa pompa air yang terletak pada tambang bawah tanah Tunnel Gudang Bahan Peledak PT ANTAM UBPE Pongkor, Jawa Barat. Kajian ini dilakukan untuk meningkatkan sistem dewatering akibat adanya overflow air bawah tanah di Jalan akses cross-cut 450. Penelitian ini berhasil dilakukan menggunakan metode terpenuhinya neraca air, dimana air yang masuk dan air yang keluar sama, yaitu debit air 7,521 m3 per menit ditangani oleh 4 buah pompa Tsurumi LH 875, 4 buah pompa Tsurumi 637 dan 1 buah pompa Warman 4/3 EEHH. Estimasi penghematan biaya telah selesai dilakukan. Sebagai hasilnya, sistem dewatering bekerja sangat baik dengan penghematan biaya sebesar 33%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.