Journal Article

Effects of biochar content on gas diffusion coefficient of soil with different compactness and air contents

Zhao, Neng Kai, Liu, Hong Wei, Chen, Fu Quan, Feng, Song, Liu, Yu Chuan

2020

Overview

Biochar has been found to be a potentially suitable amendment for landfill cover material and agricultural soil. The addition of biochar can improve the physical (e.g., adsorption capacity) and hydrological properties (e.g., water/gas permeability) of soil. However, no experimental study is available about the effect of biochar content (BC) on the gas diffusion coefficient ( D P ) of soil. The present study investigated the effect of BC on D P under different degree of compaction (DOC; 85%, 90%, and 95%) and soil air contents (SAC; 5%, 10%, and 15%). It was found that DOC and BC had negligible effects on D P when SAC was low (~ 5%). In contrast, when the SAC was relatively high (~ 15%), soil with DOC of 85% had the largest D P for BC ranging from 0 to 15% (w/w). Only when the SAC was large (~ 15%), the addition of biochar generally increased D P .

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: adsorption / Agricultural land / agricultural soils / air / Aquatic Pollution / Atmospheric Protection/Air Quality Control/Air Pollution / biochar / Charcoal / Civil engineering / Diffusion coefficient / diffusivity / Dissolved organic carbon / Earth and Environmental Science / Ecotoxicology / Environment / Environmental Chemistry / Environmental Health / Environmental science / Gaseous diffusion / Hydrology / Landfill / Landfills / Oxidation / Particle size / Permeability / Porous materials / Research Article / soil air / Soil compaction / Soil investigations / Soil permeability / Soils / Waste disposal sites / Waste Water Technology / Water Management / Water Pollution Control