Towards effective recovery of humate as green fertilizer from landfill leachate concentrate by electro-neutral nanofiltration membrane

Wenyuan Ye, Mingqiu Hong, Xuan Huang, Tianci Chen, Ailiang Gu, Xiaocheng Lin, Xuewei Li, Xiangrong Chen, Dong Han Seo, Shuaifei Zhao, Xueming Chen, Bart Van der Bruggen, Ming Xie, Jiuyang Lin

Research output: Contribution to journalArticlepeer-review

6 Citations (SciVal)

Abstract

Under the environmental sustainability concept, landfill leachate concentrate can be up-cycled as a useful resource. Practical strategy for effective management of landfill leachate concentrate is to recover the existing humate as fertilizer purpose for plant growth. Herein, we designed an electro-neutral nanofiltration membrane to separate the humate and inorganic salts for achieving a sufficient humate recovery from leachate concentrate. The electro-neutral nanofiltration membrane yielded a high retention of humate (96.54 %) with an extremely low salt rejection (3.47 %), tremendously outperforming the state-of-the-art nanofiltration membranes and exhibiting superior promise in fractionation of humate and inorganic salts. With implementation of the pressure-driven concentration process, the electro-neutral nanofiltration membrane enriched the humate from 1756 to 51,466 mg∙L−1 at a fold of 32.6, enabling 90.0 % humate recovery and 96.4 % desalination efficiency from landfill leachate concentrate. Furthermore, the recovered humate not only exerted no phytotoxicity, but also significantly promoted the metabolism of red bean plants, serving as an effective green fertilizer. The study provides a conceptual and technical platform using high-performance electro-neutral nanofiltration membranes to extract the humate as a promising nutrient for fertilizer application, in view of sustainable landfill leachate concentrate treatment.

Original languageEnglish
Article number165335
Number of pages9
JournalScience of the Total Environment
Volume896
Early online date5 Jul 2023
DOIs
Publication statusPublished - 20 Oct 2023

Bibliographical note

Funding Information:
J. Lin would like to thank the funding support from the National Key Research and Development Program of China ( 2021YFC3201400 ) and the Natural Science Foundation of Fujian Province (Grant No.: 2021J01628 ). X. Huang and A. Gu would like to thank the funding support from the National Key Research and Development Program of China (Grant No. 2018YFC1802400 ). M. Xie would like to thank the funding support from the Royal Society ( IEC\NSFC\211021 ). D.H. Seo would like to acknowledge the research support from the Korea Institute of Energy Technology (KENTECH) .

Keywords

  • Desalination
  • Electro-neutral nanofiltration membranes
  • Green fertilizer
  • Humate extraction
  • Landfill leachate concentrate

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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