Removal of perchlorate using either acid-washed zero-valent aluminum or aluminum hydroxide was studied in batch reactors under ambient temperature and pressure. Approximately 90-95% of perchlorate was removed within 24h in the presence of 35 g L(-1) aluminum at acidic pH (4.5+/-0.2). Although aluminum is a strong reductant, this study indicated no explicit evidence to support perchlorate reduct...

-The influence of different ions in the formation of AI(OH)3 polymorphs has been studied experimentally by promoting stoichiometric reactions between the aluminum salts (A1C13, Al(NO3)3, A12(504)3) and bases (NaOH, KOH, NH4OH). In all cases the polymorphs obtained were a mixture of gibbsite, bayerite and nordstrandite or pseudoboehmite with the exception of the reaction between KOH, or NH4OH an...

Combination of electrodes, such as aluminum and iron in a single electrochemical cell provide an alternative method for removal of arsenic from water by electrocoagulation. The removal process has been studied with a wide range of arsenic concentration (1-1000 ppm) at different pH (4-10). Analysis of the electrochemically generated by-products by XRD, XPS, SEM/EDAX, FT-IR, and Mössbauer Spectro...

The addition of active seed for increasing the precipitation rate leads to formation fine Al(OH)3 particles that complicates separation solid from mother liquor. In this study, enhanced coarse sodium aluminate solution using agglomerated was investigated. Aluminum salt (Al2(SO4)3) were used at initial process. About 50% obtained when these agglomerates as a in amount 20 g L−1 25 °C within 10 h....

Background: Aluminium dross is a valuable resource that is often redirected to landfill as there are no real viable solutions for the utilisation of this industrial waste. A study has been conducted to provide a recycling process where the dross is reacted with an alkaline solution in order to generate hydrogen with bayerite and gibbsite products. Methods: Samples of aluminium dross were obtain...

考古学分野において，土器の内面に白色物質が付着した報告が散見される．これまでに土器内面付着白色物を対象に行った蛍光X線分析，FTIR（Fourier Transform Infrared Spectroscopy）分析及びX線回折によって，白色物は水酸化アルミニウムの結晶と同定した報告がある．ただし，その起源については明らかにはなっていない．今般，平城京跡出土の奈良時代須恵器内面に白色付着物が見られた事例があった．そこで土器の用途について解明することを目的に，土器内面の白色物について蛍光X線分析，FTIR分析，X線回折を行ったところ，水酸化アルミニウムの結晶の一種であるバイヤライトと同定した．土器付着白色物質の同定例としてバイヤライトが同定されることは珍しい．バイヤライトの成因は土器の使用用途に関連していると考えられるが，そこに外部環境が関与した可能性がある．これまでの知見と考え合わ...