Palygorskite was applied in complexation-ultrafiltration treatment of heavy metals in wastewater under different pH and ionic strength. The results indicated that the rejection of heavy metals increased significantly with pH value, and decreased slightly with an increase of ionic strength of Na~(+)and Cl~(–). A certain concentration of NaCl significantly reduced the rejection rate of Cu~(2+). The rejection of Cu~(2+), Zn~(2+)and Cd~(2+)could reach over 86.8%, 93.6% and 93.7% at pH of 7 and 0.1 mol/L NaCl. The rejection of heavy metals was severely affected by low molecular weight competing complexing agents and the effect of sodium tartrate was greater than triethanolamine. In the presence of sodium tartrate, the rejection of Cu~(2+), Zn~(2+)and Cd~(2+)could arrive over 81.4%, 57.6% and 60.5% at pH of 7 in 20 min. Palygorskite was offered a potential complexing agent for the removal of heavy metals in wastewater at the complexation-ultrafiltration process.
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机译：在不同pH和离子强度下，帕莱戈斯斯基酯用于络合 - 超滤处理废水中的重金属。结果表明，重质金属的排斥随着pH值显着增加，并随着Na〜（+）和Cl〜（ - ）的离子强度而略微降低。一定浓度的NaCl显着降低了Cu〜（2+）的排斥率。抑制Cu〜（2+），Zn〜（2+）和Cd〜（2+）的抑制率可以在7和0.1mol / L NaCl的pH下达到超过86.8％，93.6％和93.7％。通过低分子量竞争络合剂的重质金属的排斥受到低分子量竞争络合剂的影响，并且酒石酸钠的作用大于三乙醇胺。在酒石酸钠的存在下，抑制Cu〜（2+），Zn〜（2+）和Cd〜（2+）可以在20分钟内以7的pH值达到81.4％，57.6％和60.5％。在络合超滤过程中提供普利尔斯斯基酯的潜在络合剂，用于去除废水中的重金属。
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