Removal of Lead Ions from Water by Struvite Natural Zeolite Composite

• Published in: Huanjing kexue Vol. 40; no. 3; p. 1310
• Main Authors: Dend, Man-Jun, Wang, Xue-Jiang, Cheng, Xue-Jun, Jing, Huan-Ping, Zhao, Jian-Fu
• Format: Journal Article
• Language: Chinese
• Published: China 08.03.2019
• Subjects: struvite; natural zeolite; absorb; lead
• DOI: 10.13227/j.hjkx.201808098
• ISSN: 0250-3301

A nitrogen and phosphorus recovery product (NZ-MAP) containing struvite was applied to remove heavy metal ions and lead from water. NZ-MAP was characterized using XRD, FTIR, and SEM/EDS. The effects of dosage, initial pH, and reaction time on the removal process were investigated. The results show that the main component of NZ-MAP is a natural zeolite loaded with struvite. When the dosage is 0.4 g·L , the maximum adsorption amount is 749.74 mg·g , and the adsorption of Pb in the solution increases first and then tends to reach a balance with increase of the pH. Its removal mechanism is mainly Pb (PO ) (OH) precipitation, and the effect is best when pH is 5.0. The removal process of Pb from water is more in line with the quasi-two stage kinetic model. In an investigation of the effect of coexisting heavy metal ions on the removal of lead ions in water by NZ-MAP, it was found that coexisting Ni and Cu have little effect on NZ-MAP adsorption on Pb . Coexisting Zn and Al obviously inhibit the adsorption of Pb by