不同農業廢棄物特性及其施用對土壤中砷鎘植物有效性之影響

Effects of Different Agricultural Waste Characteristics and Application on the Availability of Arsenic and Cadmium Plants in Soil

張文千(WEN-CHIEN CHANG)

指導教授 ： 程淑芬

朝陽科技大學/理工學院/環境工程與管理系/碩士(2020年)

摘要

砷、鎘污染在現今是毒性強也難處理的重金屬，在國內這兩種重金屬皆因為自然風化而導致環境污染，但在人為污染的情況也佔了一大部分。目前台灣在整治農田重金屬土壤以翻轉稀釋法整治，雖說翻轉稀釋法能讓重金屬濃度迅速降低，但實質上是治標不治本，甚至整治後，土壤仍高於管制標準，間接影響農作物，出現食安問題。
台灣農業發達，出口量越來越大，同時農業廢棄物也逐漸增加，多數農人因農業廢棄物無法妥善處理而進行燃燒露天燃燒，導致環境污染。
近年來有多篇國外文獻指出，生物炭可作為土壤改良劑，增加土壤保水能力，甚至有固炭此優點，可降低地球暖化的速度。
本研究欲解決農田重金屬整治及過多農業廢棄物兩大問題，因此選用農業廢棄物製備生物炭添入重金屬土壤，進行土壤改質，使農作物重金屬含量達到食用標準。

關鍵字

生物炭 ； 鎘 ； 砷

並列摘要

Arsenic and cadmium pollution are nowadays toxic and difficult to deal with heavy metals, both of which are caused by natural weathering in China. The pollution, however, also accounts for a large part of the anthropogenic pollution. Currently, Taiwan is remediating its farmland heavy metal soils by means of the reversal dilution method, although it is said that the reversal dilution method can rapidly reduce the concentration of heavy metals. Even after remediation, the soil is still higher than the regulated standard, which indirectly affects crops and causes food safety problems.
Taiwan's agricultural industry has developed and exported more and more, while agricultural waste has also increased gradually. The company has also been handling open burning, which leads to environmental pollution.
In recent years, a number of foreign papers have pointed out that biochar can be used as a soil conditioner to increase the soil's water-holding capacity, and even has the advantage of carbon fixation. It can reduce the rate of global warming.
This study aims to solve the two major problems of heavy metal remediation and excessive agricultural wastes. To improve the quality of heavy metal soils so that the heavy metal content of crops meets food standards.

並列關鍵字

biochar ； cadmium ； arsenic

參考文獻

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