Adsorption of Cr(VI) in Aqueous Solution Using a Surfactant-Modified Bentonite

<div>Response surface plot for Cr(VI) removal using organobentonite. Conditions: <svg height="11.927pt" id="M48" style="vertical-align:-3.291101pt" version="1.1" viewbox="-0.0498162 -8.6359 13.9819 11.927" width="13.9819pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M645 631C614 643 545 666 457 666C215 666 23 519 23 283C23 90 158 -16 337 -16C412 -16 489 2 522 10C543 39 590 127 606 167L580 181C519 89 459 18 348 18C201 18 122 136 122 287C122 464 244 632 435 632C544 632 602 595 608 472L639 475C643 526 645 581 645 631Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,8.619,3.132)"><path d="M250 606C250 634 233 656 203 656C168 656 146 618 146 593C146 564 169 545 192 545C227 545 250 573 250 606ZM227 95L212 119C187 98 152 71 135 71C129 71 128 78 134 102L207 373C219 418 217 451 194 451C165 451 92 411 30 351L44 326C77 353 106 371 114 371C124 371 121 357 117 341L55 97C32 5 46 -12 70 -12C108 -12 191 51 227 95Z"></path></g></svg> = 50 mg/L, <i>V</i> = 50 mL, <i>T</i> = 20°C, stirring speed = 230 rpm, and contact time = 150 min.</div>

The Scientific World Journal

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Figure 8

Figure 8: Adsorption of Cr(VI) in Aqueous Solution Using a Surfactant-Modified Bentonite 