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以黄原胶为接枝骨架,丙烯酸为单体,羟基磷灰石为无机组分,通过氧化还原聚合反应,制备了高分子改性黄原胶/羟基磷灰石复合水凝胶(XG-g-PAA/HAP).红外光谱和扫描电镜表征发现,在低温条件下(50℃)成功制备了XG-g-PAA/HAP.将XG-g-PAA/HAP用作水体重金属离子吸附剂,结果表明:当pH<1时,XG-g-PAA/HAP吸附容量较小,随着pH增大,吸附容量快速增大,当pH>4时,吸附容量达到平衡;90%以上的金属离子在30 min内可被清除.当[Cu~(2+)]=300 mg·L~(-1)和[Pb~(2+)]=600 mg·L~(-1)时,XG-g-PAA/HAP吸附容量达到最大值.重复吸附-脱吸附5次后,吸附容量仍可保持初始的80%,所制备的XG-g-PAA/HAP有望成为一种有效的水体重金属离子吸附剂.
Using xanthan gum as the graft skeleton, acrylic acid as the monomer and hydroxyapatite as the inorganic component, a polymer-modified xanthan gum / hydroxyapatite composite hydrogel (XG- The results showed that XG-g-PAA / HAP was successfully prepared at low temperature (50 ℃) by X-ray fluorescence spectroscopy and scanning electron microscopy. XG-g-PAA / HAP was used as a heavy metal ion adsorbent for water, The results showed that the adsorption capacity of XG-g-PAA / HAP was small at pH <1, and the adsorption capacity increased rapidly with the increase of pH. When pH> 4, the adsorption capacity of XG- Can be removed within 30 min. When [Cu ~ (2 +)] = 300 mg · L -1 and [Pb ~ (2 +)] = 600 mg · L -1, The adsorption capacity of g-PAA / HAP reaches the maximum value.After repeated adsorption-desorption for 5 times, the adsorption capacity can still maintain the initial 80%, and the prepared XG-g-PAA / HAP is expected to be an effective adsorption of heavy metal ions Agent.