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Abstract：
Biochar has gained an attention in reducing the bio-availability of toxic heavy metals and minimize threat of entering into food chain from contaminated soil. This study was aimed at evaluating the potential use of brewery sludge biochar (BSB) as a soil amendment for reducing cadmium bio-availability and uptake by Brassica carinata in a pot experiment. In this pot experiment, artificially cadmium spiked, moderately fertile, and slightly basic silty-loam soil was used. The biochar was produced by pyrolyzing of the brewery sludge at 500 °C. The obtained biochar was sieved with 0.5 mm mesh size and applied at the rate of 4 % (w/w) on the Brassica carinata grown cadmium spiked soil. The additions of BSB to the soil contributed a significant reduction of the bio-availability of cadmium in the soil and its accumulation in the shoot of Brassica carinata by 86% and 93%, respectively. Besides, it remarkably increased the dry weight of the edible part of Brassica carinata by 228%. The results revealed that BSB is very effective additive in cadmium immobilization, in turn, significantly (p-value = 0.00) promoting vegetable (Brassica carinata) growth. Therefore, BSB can be used as agricultural soil remedy for cadmium contamination and as safe disposal of brewery sludge.
摘要：
生物炭在减少有毒重金属的生物利用度和最大程度地减少从污染土壤进入食物链的威胁方面获得了关注。这项研究的目的是评估啤酒污泥生物炭（BSB）作为土壤改良剂的潜在用途，以减少镉的生物有效性和甘蓝型油菜在盆栽实验中的吸收。在这个锅实验中，人工添加镉，适度肥沃，并使用了微碱性粉质壤土。生物炭是通过在500°C下热解啤酒厂污泥而产生的。将获得的生物炭用0.5mm的筛目尺寸筛分,并以4%(w/w)的比率施用在芸苔属植物生长的掺镉土壤上。向土壤中添加BSB可以显着降低土壤中镉的生物有效性及其在甘蓝型油菜茎中的积累，分别降低86％和93％，分别。此外,它使甘蓝型油菜可食部分的干重显着增加了228％。结果表明，BSB是镉固定化中非常有效的添加剂，反过来,显着（p值=0.00）促进蔬菜（甘蓝型油菜）生长。因此,BSB可用作镉污染的农业土壤补救措施和啤酒污泥的安全处置。
