Synthesis of Poly(Ortho-Phenylenediamine) Fluffy Microspheres and Application for the Removal of Cr(VI)

<table>Freundlich adsorption isotherm for Cr(VI) ions adsorption on the PoPD. Freundlich equation: <svg height="14.825" id="M61" style="vertical-align:-3.2316pt" version="1.1" viewbox="0 0 194.0125 14.825" width="194.0125" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.825)">
<g transform="translate(72,-60.14)">
<text transform="matrix(1,0,0,-1,-71.95,63.41)">
<tspan style="font-size: 12.50px; " x="0" y="0">l</tspan>
<tspan style="font-size: 12.50px; " x="3.4758339" y="0">o</tspan>
<tspan style="font-size: 12.50px; " x="9.727334" y="0">g</tspan>
<tspan style="font-size: 12.50px; " x="22.217831" y="0">𝑞</tspan>
</text>
<text transform="matrix(1,0,0,-1,-43.99,60.28)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑒</tspan>
</text>
<text transform="matrix(1,0,0,-1,-36.13,63.41)">
<tspan style="font-size: 12.50px; " x="0" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="12.027886" y="0">l</tspan>
<tspan style="font-size: 12.50px; " x="15.50372" y="0">o</tspan>
<tspan style="font-size: 12.50px; " x="21.75522" y="0">g</tspan>
<tspan style="font-size: 12.50px; " x="34.258221" y="0">𝐾</tspan>
<tspan style="font-size: 12.50px; " x="46.573673" y="0">+</tspan>
<tspan style="font-size: 12.50px; " x="57.913895" y="0">(</tspan>
<tspan style="font-size: 12.50px; " x="62.077396" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="68.328896" y="0">/</tspan>
<tspan style="font-size: 12.50px; " x="71.804726" y="0">𝑛</tspan>
<tspan style="font-size: 12.50px; " x="78.018723" y="0">)</tspan>
<tspan style="font-size: 12.50px; " x="84.270218" y="0">l</tspan>
<tspan style="font-size: 12.50px; " x="87.746056" y="0">o</tspan>
<tspan style="font-size: 12.50px; " x="93.997551" y="0">g</tspan>
<tspan style="font-size: 12.50px; " x="106.50056" y="0">𝐶</tspan>
</text>
<text transform="matrix(1,0,0,-1,78.76,60.28)">
<tspan style="font-size: 8.75px; " x="0" y="0">𝑒</tspan>
</text>
</g>
</g>
</svg>.</table>

Journal of Nanomaterials

fig7

Figure 7

Figure 7: Synthesis of Poly(Ortho-Phenylenediamine) Fluffy Microspheres and Application for the Removal of Cr(VI) 