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Characteristics of conocarpus wastes and common reed biochars as a predictor of potential environmental and agronomic applications
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ( IF 2.9 ) Pub Date : 2020-06-24 , DOI: 10.1080/15567036.2020.1783396
Shila Khajavi-Shojaei 1 , Abdolamir Moezzi 1 , Mojtaba Norouzi Masir 1 , Mehdi Taghavi 2
Affiliation  

In current study physicochemical, elemental and nutriental properties of biochars produced from two types of municipal residues including conocarpus waste (CW) and common reed (CR) at three pyrolysis temperature (200, 350, and 500 °C) was to evaluate and that exploit the potentail of them as predictors of their suitability for soil and environmental amelioration purposes. The results indicated that pyrolysis temperature and feedstock types strongly influenced biochar properties. Comparison of CR and CW biochars indicated that CR biochar had greater volatile matter (10–45%), carbon contents (15–83%), anion exchange capacity (33–41%), specific surface area (15–38%), and total concentration of phosphorous (85–188%) and potassium (16–70%), while CW biochar had greater ash content (33–37%), nitrogen content (36–109%), and sulfur content (65–215%) as well as micronutrient concentration. Regardless of feedstock type, with raising pyrolysis temperature, the ash content, fixed carbon, pH, electrical conductivity, anion exchange capacity, aromatic compounds, and nutrient concentration increased. A great amount of nitrogen (0.88–1.74%), phosphorus (0.09–0.47 g kg−1), and potassium (0.43–1.50 g kg−1) concentration in biochars can be considered as a suitable source of nutrient for plants in less fertile soils. Therefore, according to the requirement, variety of biochars with different properties can be produced by selecting suitable feedstock and charring condition for agronomic and environmental uses. Application of external source of waste energy is also beneficial both financially and technologically alongside with alleviating nutrient leaching and improving soil quality and fertility state.

Abbreviations

CW: conocarpus waste; CR: common reed; MT: million tons; EC: electrical conductivity; CEC: cation exchange capacity; AEC: anion exchange capacity; C: carbon; O: oxygen; H: Hydrogen; Na: sodium; K: potassium; P: phosphorous; Fe: iron; Cu: copper; Zn: zinc; Mn: manganese; SSA: specific surface area BET: Brunauer–Emmett–Teller; SEM: scanning electron microscope; FT-IR: Fourier transform infrared spectroscopy



中文翻译:

果皮废弃物和常见芦苇生物炭的特征可预测潜在的环境和农学应用

在当前的研究中,要评估在三种热解温度(200、350和500°C)下由果皮废弃物(CW)和芦苇(CR)这两种市政残留物产生的生物炭的理化,元素和营养特性,并对其进行开发它们的潜力可以预测它们是否适合土壤和改善环境。结果表明热解温度和原料类型强烈影响生物炭的性质。CR和CW生物炭的比较表明,CR生物炭具有较大的挥发性物质(10–45%),碳含量(15–83%),阴离子交换容量(33–41%),比表面积(15–38%),磷(85-188%)和钾(16-70%)的总浓度,而连续生物炭的灰分(33-37%),氮含量(36-109%),硫含量(65–215%)以及微量营养素浓度。不管原料类型如何,随着热解温度的升高,灰分含量,固定碳,pH,电导率,阴离子交换容量,芳香族化合物和营养物浓度都会增加。大量的氮(0.88–1.74%),磷(0.09–0.47 g千克-1)和生物炭中的钾(0.43-1.50 g kg -1)浓度可以认为是肥沃土壤中植物的合适养分来源。因此,根据需要,可以通过选择适合农业和环境用途的原料和炭化条件来生产具有不同性质的各种生物炭。外部废物能源的应用在经济上和技术上都将受益,同时减少了养分的淋失并改善了土壤质量和肥力状态。

缩略语

CW:果皮废物;CR:普通芦苇;MT:百万吨;EC:电导率;CEC:阳离子交换能力;AEC:阴离子交换容量;C:碳;O:氧气;H:氢;Na:钠 K:钾;P:磷;铁:铁;铜:铜;锌:锌;Mn:锰;SSA:比表面积BET:Brunauer–Emmett–Teller;SEM:扫描电子显微镜;FT-IR:傅立叶变换红外光谱

更新日期:2020-06-24
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