Legacy Effects of Sorption Determine the Formation Efficiency of Mineral-Associated Soil Organic Matter

Chen, Shuling1,3,4; Klotzbuecher, Thimo1; Lechtenfeld, Oliver J.2; Hong, Hanlie3; Liu, Chongxuan4; Kaiser, Klaus1; Mikutta, Christian5; Mikutta, Robert1

2022

10.1021/acs.est.1c06880

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

Sorption of dissolved organic matter (DOM) is one major pathway in the formation of mineral-associated organic matter (MOM), but there is little information on how previous sorption events feedback to later ones by leaving their imprint on mineral surfaces and solutions ("legacy effect"). In order to conceptualize the role of legacy effects in MOM formation, we conducted sequential sorption experiments with kaolinite and gibbsite as minerals and DOM derived from forest floor materials. The MOM formation efficiency leveled off upon repeated addition of identical DOM solutions to minerals due to the retention of highly sorptive organic molecules (primarily aromatic, nitrogen-poor, hydrogen-poor, and oxygen-rich molecules), which decreased the sorption site availability and simultaneously modified the mineral surface charge. Organic-organic interactions as postulated in multilayer models played a negligible role in MOM formation. Continued exchange between DOM and MOM molecules upon repeated sorption altered the DOM composition but not the MOM formation efficiencies. Sorption-induced depletion of high-affinity compounds from solutions further decreased the MOM formation efficiencies to pristine minerals. Overall, the interplay between the differential sorptivities of DOM components and the mineral surface chemistry explains the legacy effects that contribute to the regulation of fluxes and the distribution of organic matter in the soil.

soil organic matter mineral-associated organic matter sorption carbon sequestration Fourier-transform ion cyclotron resonance mass spectrometry legacy effects

SCI ; EI

英语

NI论文

通讯

German Research Foundation (DFG)[MI 1377/13-1] ; Program for Guangdong Introducing Innovative and Entrepreneurial Teams[2017ZT07Z479] ; Natural Science Foundation of China[41772032,42172045]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000743188200001

AMER CHEMICAL SOC

20220511580845

Biogeochemistry ; Carbon ; Efficiency ; Kaolinite ; Mass spectrometry ; Molecules ; Soils ; Surface chemistry

Geochemistry:481.2 ; Minerals:482.2 ; Soils and Soil Mechanics:483.1 ; Chemistry:801 ; Biochemistry:801.2 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Production Engineering:913.1 ; Atomic and Molecular Physics:931.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Martin Luther Univ Halle Wittenberg, Soil Sci & Soil Protect, Seckendorff Pl 3, D-06120 Halle, Saale, Germany
2.UFZ Helmholtz Ctr Environm Res, Dept Analyt Chem, Res Grp BioGeo, D-04318 Leipzig, Germany
3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
4.Southern Univ Sci & Technol, China State Environm Protect Key Lab Integrated S, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
5.Leibniz Univ Hannover, Soil Mineral, D-30167 Hannover, Germany

Chen, Shuling,Klotzbuecher, Thimo,Lechtenfeld, Oliver J.,et al. Legacy Effects of Sorption Determine the Formation Efficiency of Mineral-Associated Soil Organic Matter[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(3):2044-2053.

Chen, Shuling.,Klotzbuecher, Thimo.,Lechtenfeld, Oliver J..,Hong, Hanlie.,Liu, Chongxuan.,...&Mikutta, Robert.(2022).Legacy Effects of Sorption Determine the Formation Efficiency of Mineral-Associated Soil Organic Matter.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(3),2044-2053.

Chen, Shuling,et al."Legacy Effects of Sorption Determine the Formation Efficiency of Mineral-Associated Soil Organic Matter".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.3(2022):2044-2053.