湖北农业科学
湖北農業科學
호북농업과학
2014年
7期
1539-1542
,共4页
核桃壳%吸附%Ni2+%吸附动力学%吸附等温线
覈桃殼%吸附%Ni2+%吸附動力學%吸附等溫線
핵도각%흡부%Ni2+%흡부동역학%흡부등온선
walnut shell%biosorption%Ni2+%sorption kinetics model%adsorption isotherm
采用核桃壳吸附模拟废水中的Ni2+离子。结果表明，在25℃下，采用粒径为1.6~2.5 mm吸附剂2.0 g， pH 6.0，处理浓度为10 mg/L的含Ni2+模拟废水100 mL，吸附时间360 min，Ni2+的去除率达最大。吸附剂对Ni2+的吸附行为满足拟二级动力学方程和Langmuir等温方程，Ni2+浓度为10、20、30、50 mg/L时，吸附速率常数分别为0.170、0.165、0.196、0.225 g/（mg·min)，最大吸附量为0.687 mg/g。
採用覈桃殼吸附模擬廢水中的Ni2+離子。結果錶明，在25℃下，採用粒徑為1.6~2.5 mm吸附劑2.0 g， pH 6.0，處理濃度為10 mg/L的含Ni2+模擬廢水100 mL，吸附時間360 min，Ni2+的去除率達最大。吸附劑對Ni2+的吸附行為滿足擬二級動力學方程和Langmuir等溫方程，Ni2+濃度為10、20、30、50 mg/L時，吸附速率常數分彆為0.170、0.165、0.196、0.225 g/（mg·min)，最大吸附量為0.687 mg/g。
채용핵도각흡부모의폐수중적Ni2+리자。결과표명，재25℃하，채용립경위1.6~2.5 mm흡부제2.0 g， pH 6.0，처리농도위10 mg/L적함Ni2+모의폐수100 mL，흡부시간360 min，Ni2+적거제솔체최대。흡부제대Ni2+적흡부행위만족의이급동역학방정화Langmuir등온방정，Ni2+농도위10、20、30、50 mg/L시，흡부속솔상수분별위0.170、0.165、0.196、0.225 g/（mg·min)，최대흡부량위0.687 mg/g。
Walnut shell was used as biosorbent to remove Ni2+ metallic ions from simulated aqueous solutions. The results showed that the optimal initial solution pH values for adsorption were 6.0, the diameter walnut shell was 1.6~2.5mm,the adsorbent dosage was 2.0 g, adsorption time was about 360 minutes, leading to the removal rate of Ni2+ reached the peak under 25℃. Sorption kinetics of Ni2+ onto walnut shell followed pseudo second order kinetic model and adsorption isotherm was fitted well with Langmuir equation. The sorption rates were 0.170、0.165、0.196、0.225 g/(mg?min﹚ for 10、20、30、50 mg/L of the metallic ion solutions. The individual maximum sorption capacity was 0.687 mg/g.
