Waste-derived compost and biochar amendments for stormwater treatment in bioretention column: Co-transport of metals and colloids

Yuqing Sun, Season S. Chen, Abbe Y.T. Lau, Daniel C.W. Tsang, Sanjay K. Mohanty, Amit Bhatnagar, Jörg Rinklebe, Kun Yi Andrew Lin, Yong Sik Ok

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Bioretention systems, as one of the most practical management operations for low impact development of water recovery, utilize different soil amendments to remove contaminants from stormwater. For the sake of urban sustainability, the utilization of amendments derived from waste materials has a potential to reduce waste disposal at landfill while improving the quality of stormwater discharge. This study investigated the efficiency of food waste compost and wood waste biochar for metal removal from synthetic stormwater runoff under intermittent flow and co-presence of colloids. Throughout intermittent infiltration of 84 pore volumes of stormwater, columns amended with compost and biochar removed more than 50–70% of influent metals, whereas iron-oxide coated sand was much less effective. Only a small portion of metals adsorbed on the compost (< 0.74%) was reactivated during the drainage of urban pipelines that do not flow frequently, owing to abundant oxygen-containing functional groups in compost. In comparison, co-existing kaolinite enhanced metal removal by biochar owing to the abundance of active sites, whereas co-existing humic acid facilitated mobilization via metal-humate complexation. The results suggest that both waste-derived compost and biochar show promising potential for stormwater harvesting, while biochar is expected to be more recalcitrant and desirable in field-scale bioretention systems.

Original languageEnglish
Article number121243
JournalJournal of hazardous materials
Volume383
DOIs
Publication statusPublished - 2020 Feb 5

Fingerprint

Colloids
colloid
stormwater
compost
Soil
Metals
metal
Wood wastes
Kaolin
Therapeutics
Humic Substances
Kaolinite
Waste Disposal Facilities
soil amendment
Land fill
Complexation
Runoff
Iron oxides
Infiltration
Waste disposal

Keywords

  • Bioretention systems
  • Engineered biochar
  • Metal/metalloid immobilization
  • Stormwater treatment
  • Sustainable waste management

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Waste-derived compost and biochar amendments for stormwater treatment in bioretention column : Co-transport of metals and colloids. / Sun, Yuqing; Chen, Season S.; Lau, Abbe Y.T.; Tsang, Daniel C.W.; Mohanty, Sanjay K.; Bhatnagar, Amit; Rinklebe, Jörg; Lin, Kun Yi Andrew; Ok, Yong Sik.

In: Journal of hazardous materials, Vol. 383, 121243, 05.02.2020.

Research output: Contribution to journalArticle

Sun, Yuqing ; Chen, Season S. ; Lau, Abbe Y.T. ; Tsang, Daniel C.W. ; Mohanty, Sanjay K. ; Bhatnagar, Amit ; Rinklebe, Jörg ; Lin, Kun Yi Andrew ; Ok, Yong Sik. / Waste-derived compost and biochar amendments for stormwater treatment in bioretention column : Co-transport of metals and colloids. In: Journal of hazardous materials. 2020 ; Vol. 383.
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