AI Article Synopsis
- The study explores the use of waste paper sludge, primarily made up of cellulose fibers and inorganic materials, as an adsorbent for various ions.
- When heated at temperatures between 500-900 degrees C, the composition of the sludge changes, leading to the formation of new crystalline phases and optimal conditions for ion uptake.
- Specifically, sludge fired at 700 degrees C demonstrated the highest ability to absorb nickel, phosphate, and ammonium ions, highlighting its potential as a cost-effective solution for treating heavy metals and nutrients in wastewater.
Article Abstract
This study concerns with the utilization of waste paper sludge, which contains mainly cellulose fibers and inorganic fillers together with coating materials such as calcite, kaolinite and talc. Paper sludge was fired at 500-900 degrees C for 6 h. The crystalline phases originally present decomposed at increasing temperatures (up to 800 degrees C) in the order kaolinite < calcite < talc. Gehlenite was formed at 800 degrees C in increasing amounts above this temperature together with small amounts of magnesium aluminum silicate and anorthite. The uptake of these fired samples of Ni2+, PO3 and NH+ was investigated at room temperature. Paper sludge fired at 700 degrees C showed the highest uptake of Ni2+, PO4(3-) and NH4+ (3.93, 1.28 and 0.49 mmol/g, respectively). The main process responsible for the sorption of these ions is the ion change along with precipitation with higher solution pH. From an economic point of view, paper sludge is the cheapest raw material for preparing adsorbents with high uptake ability for heavy metal, phosphate and ammonium ions.
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| http://dx.doi.org/10.1080/10934520600575101 | DOI Listing |
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