Biosorption Mechanism of Aqueous Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Ni<sup>2+</sup> Ions on Extracellular Polymeric Substances (EPS)

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Heavy metals</td><td class="align_center">Temperature (°C)</td><td class="align_center"><i>q<sub>m</sub></i> (mg g<sup>-1</sup>)</td><td class="align_center"><span style="width: 91.1231ptpx;"><svg height="14.7729pt" id="M42" style="vertical-align:-3.181499pt" version="1.1" viewbox="-0.0498162 -11.5914 91.1231 14.7729" width="91.1231pt" 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="M480 416C480 431 465 448 438 448C388 448 312 383 252 330C217 299 188 273 155 237H153L257 680C262 700 263 712 253 712C240 712 183 684 97 674L92 648L126 647C166 646 172 645 163 606L23 -6L29 -12C51 -5 77 2 107 8C115 62 130 128 142 180C153 193 179 220 204 241C231 170 259 106 288 54C317 0 336 -12 358 -12C381 -12 423 2 477 80L460 100C434 74 408 54 398 54C385 54 374 65 351 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transform="matrix(.0091,0,0,-0.0091,44.976,-5.741)"><path d="M389 0V32C297 38 291 46 291 118V635C234 613 175 595 109 583V556L161 554C203 552 207 547 207 497V118C207 46 201 38 110 32V0H389Z"></path></g><g transform="matrix(.013,0,0,-0.013,49.943,0)"><path d="M275 270C275 450 212 609 64 710L45 686C145 604 203 442 203 270S147 -63 45 -147L64 -170C213 -68 275 89 275 270Z"></path></g><g transform="matrix(.013,0,0,-0.013,57.346,0)"><path d="M528 54L331 254L528 455L492 493L294 291L96 493L60 455L257 254L60 54L96 16L294 217L492 16L528 54Z"></path></g><g transform="matrix(.013,0,0,-0.013,67.883,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.013,0,0,-0.013,74.123,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,80.41,-5.741)"><path d="M556 236V289H56V236H556Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,85.97,-5.741)"><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"></path></g></svg></span></td><td class="align_center"><span style="width: 13.2276ptpx;"><svg height="11.7978pt" id="M43" style="vertical-align:-0.2063999pt" version="1.1" viewbox="-0.0498162 -11.5914 13.2276 11.7978" width="13.2276pt" 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="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"></path></g><g transform="matrix(.0091,0,0,-0.0091,8.151,-5.741)"><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"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left" rowspan="3">Pb<sup>2+</sup></td><td class="align_center">20</td><td class="align_center">105.26</td><td class="align_center">1.04</td><td class="align_center">0.99</td></tr><tr><td class="align_center">30</td><td class="align_center">103.09</td><td class="align_center">1.57</td><td class="align_center">0.99</td></tr><tr><td class="align_center">40</td><td class="align_center">101.01</td><td class="align_center">3.77</td><td class="align_center">0.99</td></tr><tr><td class="align_left" rowspan="3">Cd<sup>2+</sup></td><td class="align_center">20</td><td class="align_center">31.55</td><td class="align_center">1.33</td><td class="align_center">0.99</td></tr><tr><td class="align_center">30</td><td class="align_center">30.86</td><td class="align_center">2.09</td><td class="align_center">0.99</td></tr><tr><td class="align_center">40</td><td class="align_center">29.85</td><td class="align_center">4.40</td><td class="align_center">0.99</td></tr><tr><td class="align_left" rowspan="3">Ni<sup>2+</sup></td><td class="align_center">20</td><td class="align_center">23.42</td><td class="align_center">2.74</td><td class="align_center">0.99</td></tr><tr><td class="align_center">30</td><td class="align_center">22.42</td><td class="align_center">4.00</td><td class="align_center">0.99</td></tr><tr><td class="align_center">40</td><td class="align_center">21.65</td><td class="align_center">6.45</td><td class="align_center">0.99</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Parameters of pseudo-second-order kinetics model.</div>

Archaea

tab5

Table 5

Table 5: Biosorption Mechanism of Aqueous Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Ni<sup>2+</sup> Ions on Extracellular Polymeric Substances (EPS) 

Archaea

Biosorption Mechanism of Aqueous Pb2+, Cd2+, and Ni2+ Ions on Extracellular Polymeric Substances (EPS)

Table 5

Biosorption Mechanism of Aqueous Pb²⁺, Cd²⁺, and Ni²⁺ Ions on Extracellular Polymeric Substances (EPS)