跳至主要内容

博文

目前显示的是标签为“Equilibrium”的博文

Cost Effective Adsorption of Aluminium and Iron from Synthetic and Real Wastewater by Rice Hull Activated Carbon (RHAC)

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53266#.VLiDt8nQrzE Author(s)    Nour T. Abdel-Ghani 1 , Ghadir A. El-Chaghaby 2* , Enas Mohamed Zahran 3   Affiliation(s) 1 Chemistry Department, Faculty of science, Cairo University, Cairo, Egypt . 2 RCFF, Agricultural Research Center, Giza, Egypt . 3 Holding Company for Water and Wastewater, Greater Cairo Water Company, Cairo, Egypt . ABSTRACT The adsorption of aluminium(III) and iron(III) ions from their single and binary systems, by RHAC was investigated in a batch system. The activated carbon prepared from rice hulls was characterized by scanning electron microscopy and Fourier transformation infrared techniques. Batch adsorption experiments were performed under different operating conditions including pH (2 - 5), adsorbent dosage (0.5 - 2.0 g/l), initial ion concentration (5 - 100 mg/l), and contact time (30 - 240 min). The equilibrium time f...

Common-Value Procurement Auctions with Renegotiation

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50303#.VDXaWVfHRK0 Author(s)    Rimvydas Baltaduonis 1 , Lucas Rentschler 2 Affiliation(s) 1 Gettysburg College, Gettysburg, USA . 2 Universidad Fransisco Marroquín, Guatemala City, Guatemala . ABSTRACT This note contains the equilibrium bid functions for two types of common-value procurement auctions: 1) a procurement auction in which bids represent an enforceable contract; 2) a procurement auction in which, upon learning the true cost of supplying the good, the winning bidder can renegotiate the contract with the buyer, and each bidder must submit a bond with their bid, which is returned at the end of the auction unless they are the low bidder and renegotiat...