Enhanced removal of phosphate using pomegranate peel-modified nickel‑lanthanum hydroxide

Muhammad Akram; Baoyu Gao; Jingwen Pan; Rizwan Khan; Muhammad Ali Inam; Xing Xu; Kangying Guo; Qinyan Yue

doi:10.1016/j.scitotenv.2021.151181

Enhanced removal of phosphate using pomegranate peel-modified nickel‑lanthanum hydroxide

Sci Total Environ. 2022 Feb 25:809:151181. doi: 10.1016/j.scitotenv.2021.151181. Epub 2021 Oct 24.

Authors

Muhammad Akram¹, Baoyu Gao², Jingwen Pan³, Rizwan Khan⁴, Muhammad Ali Inam⁵, Xing Xu³, Kangying Guo³, Qinyan Yue³

Affiliations

¹ Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China; State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
² Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China. Electronic address: bygao@sdu.edu.cn.
³ Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China.
⁴ Department of Chemical Engineering, Quaid-e-Awam University of Engineering, Science and Technology (QUEST), Nawabshah 67480, Sindh, Pakistan.
⁵ Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST) H-12 Campus, Islamabad 44000, Pakistan.

PMID: 34699822
DOI: 10.1016/j.scitotenv.2021.151181

Abstract

In this work, a bimetallic Ni/La nanoparticle-laded biosorbent was fabricated from pomegranate fibers by solvothermal synthesis method. The material exhibited a high-efficient phosphate removal capability. The results of the characterization analysis showed that the surface of pomegranate fibers was rough and evenly coated with Ni and La after modification, and the specific surface area of Ni-La@Peel increased to 50.20 m²/g, providing a large number of adsorption sites for phosphate removal. The maximum phosphate removal rate of adsorbent was higher than 97% in a wide pH range (3.7-10.8). The maximum adsorption capacities of Ni-La@Peel were 226.55 mg-P/g and 220.31 mg-P/g under alkaline and acidic conditions, respectively, as calculated using the Langmuir model. Meanwhile, all the results were consistent with the Langmuir isothermal (R² = 0.99) and kinetic pseudo-second order models (R² = 0.99), indicating that the phosphate removal mechanism of Ni-La@Peel was mainly related to homogeneous chemisorption. Experimental results showed that in the presence of other anions, such as chloride, sulfate, nitrate, bromide and fluoride, the adsorption capacity of phosphate was only reduced by about 10% compared to the blank sample individually. In addition, the phosphate removal efficiency of Ni-La@Peel remained 82.05% at 7th adsorption-desorption cycle. These findings show that Ni-La@Peel is a promising material for purification of phosphate-containing wastewater.

Keywords: Adsorption; Agriculture waste; Lanthanum; Nickel; Phosphate.

MeSH terms

Adsorption
Hydrogen-Ion Concentration
Kinetics
Lanthanum
Nickel
Phosphates
Pomegranate*
Water Pollutants, Chemical* / analysis
Water Purification*

Substances

Phosphates
Water Pollutants, Chemical
lanthanum hydroxide
Lanthanum
Nickel