Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume

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24 -208C24 -231 61 -257 94 -257C124 -257 162 -243 209 -194C267 -134 303 -66 343 107C369 220 378 279 393 385L503 397L523 433H404C432 619 464 660 500 660C522 660 542 646 566 621C573 614 583 615 593 621C603 628 620 648 620 667Z" id="g50-103"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="644" vert-adv-y="644"></glyph.data></g></svg></span></td><td align="center"><span style="width: 13.7602ptpx;"><svg height="12.2911pt" id="M48" style="vertical-align:-0.2129993pt" version="1.1" viewbox="-0.0498162 -12.0781 13.7602 12.2911" width="13.7602pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M610 18C585 26 567 34 540 68C517 97 499 128 476 171C452 215 425 276 413 304C496 332 570 394 570 494C570 555 545 595 509 619S419 650 364 650H139L133 622C216 615 219 612 203 527L129 132C112 40 105 36 23 28L17 0H279L285 28C199 34 194 40 211 132L239 284H284C320 284 334 275 351 236C374 182 394 140 420 93C459 23 495 -1 592 -8H600L610 18ZM480 485C480 424 449 372 403 342C374 323 338 316 293 316H245L291 562C296 589 301 601 311 608S337 618 358 618C432 618 480 575 480 485Z" id="g113-83"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="627" vert-adv-y="627"></glyph.data></g><g transform="matrix(.0095,0,0,-0.0095,8.495,-5.984)"><path d="M414 144C384 79 371 75 317 75H135L276 221C367 316 408 376 408 465C408 570 327 635 237 635C179 635 131 609 100 575L42 494L67 471C94 510 138 565 205 565C277 565 321 517 321 435C321 348 258 270 195 195C146 137 88 81 33 26V0H411C423 44 433 88 446 135L414 144Z" id="g50-51"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="487" vert-adv-y="487"></glyph.data></g></svg></span></td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td align="left">25°C</td><td align="center">60.91</td><td align="center">0.069</td><td align="center">0.994</td><td align="center">1.927</td><td align="center">7.463</td><td align="center">0.910</td></tr><tr><td align="left">35°C</td><td align="center">80.06</td><td align="center">0.262</td><td align="center">0.980</td><td align="center">2.674</td><td align="center">14.04</td><td align="center">0.921</td></tr><tr><td align="left">45°C</td><td align="center">82.05</td><td align="center">0.443</td><td align="center">0.971</td><td align="center">3.115</td><td align="center">19.47</td><td align="center">0.874</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Langmuir and Frenudlich isotherm parameters for Cr(VI) adsorption on NH<sub>2</sub>-MCM-41 in different temperature.

Journal of Chemistry

tab3

Table 3

Table 3: Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume 