Characterization and modification of biochar from a combined heat and power (CHP) plant for amending sandy soils collected from wild blueberry fields

IF 1.3 4区农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD

Bioresources Pub Date : 2023-11-14 DOI:10.15376/biores.19.1.228-244

Abigayl Novak, Ling Li, Jay Wason, Jinwu Wang, Yong-Jiang Zhang

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Abstract

Wild (or lowbush) blueberries (Vaccinium angustifolium Ait.) undergo severe drought impacts due to climate warming because they grow in sandy soils with poor water retention. The feasibility was studied for using biochar in a forest biomass-fueled combined heat and power (CHP) plant to amend the sandy soils. The chemico-physical properties (e.g., bulk density, moisture content, porosity, pH) of the biochar were measured. An acid treatment method (1% to 3% acidic or citric acid solution) was developed to decrease the biochar pH from 11.4 to neutral or lower, aiming to aid in weed control in wild blueberry fields. The water holding capacity (WHC) of sandy soils (S) mixed with biochar (B) (Type I) and sandy soils mixed with both biochar and fertilizer (Type II) at four ratios of 100S:0B (control), 50S:50B, 30S:70B, and 10S:90B were measured. The biochar generated from the CHP plant had comparable physical properties (such as bulk density, porosity, pH, and surface area) with woody biochar made from pyrolysis. The acid treatment method significantly lowered the pH to a range of 5.0 to 6.5. The 50:50 mixing ratio for both Type I and Type II increased the water holding capacity by about 20% compared with control groups.

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热电联产（CHP）厂生物炭的特性和改良，用于改良从野生蓝莓田收集的沙质土壤

野生（或低丛）蓝莓（Vaccinium angustifolium Ait.）由于生长在保水性差的沙质土壤中，会受到气候变暖带来的严重干旱影响。我们研究了在以森林生物质为燃料的热电联产（CHP）工厂中使用生物炭来改良沙质土壤的可行性。对生物炭的化学物理特性（如体积密度、含水量、孔隙度、pH 值）进行了测量。开发了一种酸处理方法（1% 至 3% 的酸性或柠檬酸溶液），将生物炭的 pH 值从 11.4 降至中性或更低，旨在帮助野生蓝莓田控制杂草。测量了沙质土壤（S）与生物炭（B）混合（类型 I）以及沙质土壤与生物炭和肥料混合（类型 II）的持水量（WHC），四种比例分别为 100S:0B（对照）、50S:50B、30S:70B 和 10S:90B。热电厂产生的生物炭的物理特性（如体积密度、孔隙率、pH 值和表面积）与热解产生的木质生物炭相当。酸处理方法大大降低了 pH 值，使其在 5.0 至 6.5 之间。与对照组相比，I 型和 II 型的 50:50 混合比例使持水能力提高了约 20%。

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来源期刊

Bioresources 工程技术-材料科学：纸与木材

CiteScore

2.90

自引率

13.30%

发文量

397

审稿时长

2.3 months

期刊介绍： The purpose of BioResources is to promote scientific discourse and to foster scientific developments related to sustainable manufacture involving lignocellulosic or woody biomass resources, including wood and agricultural residues. BioResources will focus on advances in science and technology. Emphasis will be placed on bioproducts, bioenergy, papermaking technology, wood products, new manufacturing materials, composite structures, and chemicals derived from lignocellulosic biomass.