Removal of Ni~(2+) from wastewater by 13X molecular sieve

13X molecular sieve was used to remove Ni2+ in wastewater.To obtain the optimum conditions of Ni2+ sorption on the 13X molecular sieve,the influence of experimental conditions(solution pH,adsorbent dose,contact time and Ni2+ ion concentration) was investigated.The results showed that more than 98% of Ni2+ could be removed by the 13X molecular sieve from the wastewater with initial Ni2+ concentration of 50 mg/L~250 mg/L at 25 ℃,pH=5.9,sorbent dose of 10 g/L and contact time of 30 min.13X molecular sieve exhibits good regenerability and its removal efficiency for Ni2+ does not decrease within five recycles.