Enhanced phosphorus removal and recovery by metallic nanoparticles-modified biochar
- PDF / 1,187,052 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 44 Downloads / 252 Views
(2020) 5:26
CRITICAL REVIEWS
Enhanced phosphorus removal and recovery by metallic nanoparticles‑modified biochar Jieming Yuan1 · Yinghao Wen1 · Gloria Ruiz2 · Wenjie Sun2 · Xingmao Ma1 Received: 24 July 2020 / Accepted: 17 September 2020 © Springer Nature Switzerland AG 2020
Abstract Phosphorous (P) is a major water and wastewater pollutant and at the same time an essential crop nutrient facing a global shortage. Technologies that can remove and recover P from wastewater are pressingly needed. Even though chemical and biological P treatment technologies have been commonly used in wastewater treatment processes, effective and selective removal of P by adsorption has attracted increasing attention recently. Biochar is a carbon-rich material exhibiting high adsorption capacity for a variety of environmental pollutants. Unfortunately, its adsorption capacity for P is not impressive. However, the adsorption capacity of biochar for P can be markedly increased by modifying it with different metallic nanoparticles. This review summarizes recent progresses in the modification methods of biochar by different metallic nanoparticles and discusses the enhanced adsorption of P by modified biochar with different metals and the underlying mechanisms. Larger specific surface area provided by metal-induced morphology change, enhanced ligand exchange and surface complexation, hydrogen bonding and co-precipitation all contribute to the improved P removal by metallic nanoparticles-enhanced biochar. Among all the discussed materials, biochar decorated with magnesium (Mg)-containing nanoparticles appears to be the most promising for P removal and recovery. Keywords Biochar · Metal-enhanced biochar · Phosphorous · Metallic nanoparticles · Removal and recovery
Introduction Phosphorus in environment Phosphorus (P) is an essential element for most living organisms [1]. However, it becomes a significant environmental concern at relatively high concentrations. Dissolved phosphate at 0.02 mg/L or higher can cause eutrophication [2], which deteriorates the health of ecosystems and hinders economic development. Eutrophication is estimated to cause an annual loss of $2.2 billion in the USA alone [3]. Anthropogenic processes contribute a substantial amount of P into * Wenjie Sun [email protected] * Xingmao Ma [email protected] 1
Zachry Department of Civil and Environmental Engineering, Texas A&M University, 3136 TAMU, College Station, TX 77843‑3136, USA
Department of Civil and Environmental Engineering, Southern Methodist University, Dallas, TX 75205, USA
2
water bodies. Domestic and industrial wastewater effluents typically contain 1 to 20 mg/L of phosphorus in the USA [4]. Wastewater from industrial activities was estimated to contribute about 10% of P load to sewage treatment works, and food industry effluent was considered as the major P source [4]. The P load from wastewater discharge accounts for around 93% of total phosphorus (TP) in the river in Warwickshire Avon, UK [5]. Runoff from phosphorus-rich fertilized land is the major n
Data Loading...