TY - JOUR

T1 - Land application of microsized basalt particles

T2 - A perspective on their mobility in the soil environment

AU - Dinh, Van M.

AU - Pham, Anh M.

AU - Duong, Linh H.

AU - Nguyen, Anh M.

AU - Trinh, Kieu Trang

AU - Nguyen, Thanh Lan

AU - Tsubota, Toshiki

AU - Dultz, Stefan

AU - Nguyen, Minh N.

N1 - Publisher Copyright: © 2025 British Society of Soil Science.

PY - 2025/3/20

Y1 - 2025/3/20

N2 - Application of basalt powder (BP) for agricultural soils has been increasingly encouraged owing to its positive effects on soil fertility and carbon sequestration capability. However, the onsite positive effects can be reduced if BP or its components are prone to dispersion and losses by surface run-off or downward leaching. In this study, surface charge (SC), colloidal properties together with dispersion/aggregation phenomena of BP were determined in a systematic approach, considering co-effects of pH and ionic strength, presence and variation of various common mono-, di- and trivalent cations and anions. Possible scavenging abilities of BP for common environmental heavy metal pollutants such as Cu2+, Pb2+, Zn2+ and AsO43− were also elucidated. We found that BP possesses negative SC; hence, it is prone to dispersion in the environment with the predominantly negatively charged soil compounds. Cations tended to reduce negative charges of BP; hence, they facilitated BP aggregation. In contrast, anions showed opposite tendencies in which BP was favoured to disperse. We also found strong adsorption capabilities of BP for Pb2+, Cu2+ and Zn2+ as well as anionic AsO43−, inferring that BP can act as a sink or interfere with the transport route of heavy metals in soil-aquatic environments. In general, the findings suggest that our ambition to use engineered BP for boosting soil fertility and carbon sequestration also needs to consider the dispersibility of BP upon soil application since this process can enhance nutrient losses or heavy metal widespreads through co-transports with BP.

AB - Application of basalt powder (BP) for agricultural soils has been increasingly encouraged owing to its positive effects on soil fertility and carbon sequestration capability. However, the onsite positive effects can be reduced if BP or its components are prone to dispersion and losses by surface run-off or downward leaching. In this study, surface charge (SC), colloidal properties together with dispersion/aggregation phenomena of BP were determined in a systematic approach, considering co-effects of pH and ionic strength, presence and variation of various common mono-, di- and trivalent cations and anions. Possible scavenging abilities of BP for common environmental heavy metal pollutants such as Cu2+, Pb2+, Zn2+ and AsO43− were also elucidated. We found that BP possesses negative SC; hence, it is prone to dispersion in the environment with the predominantly negatively charged soil compounds. Cations tended to reduce negative charges of BP; hence, they facilitated BP aggregation. In contrast, anions showed opposite tendencies in which BP was favoured to disperse. We also found strong adsorption capabilities of BP for Pb2+, Cu2+ and Zn2+ as well as anionic AsO43−, inferring that BP can act as a sink or interfere with the transport route of heavy metals in soil-aquatic environments. In general, the findings suggest that our ambition to use engineered BP for boosting soil fertility and carbon sequestration also needs to consider the dispersibility of BP upon soil application since this process can enhance nutrient losses or heavy metal widespreads through co-transports with BP.

KW - basalt powder

KW - dispersibility

KW - heavy metal

KW - ionic effect

KW - surface charge

UR - http://www.scopus.com/inward/record.url?scp=105000924361&partnerID=8YFLogxK

U2 - 10.1111/sum.70059

DO - 10.1111/sum.70059

M3 - Article

AN - SCOPUS:105000924361

VL - 41

JO - Soil use and management

JF - Soil use and management

SN - 0266-0032

IS - 1

M1 - e70059

ER -